Overall Green Tropical Cyclone for ISELLE-26
Off-shore

Global Telecommunication Service

GTS (Global Telecommunication Service) is the official Warning and Alerting channel by the World Meteorological Organization (WMO) adopted by several Warning Organizations. As soon as a new GTS message regarding Tropical Cyclones(WT) or Tsunami(WE) the messages are processed and possibly assigned to the specific event. When a new GTS message is present an new tab in the specific event report page is present.The presence of a GTS message is shown in the homepage with a dedicated icon.

Click on the messages list to visualize on the right the detailed text.




Original Message :

WTPN33 PHNC 270400
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL DEPRESSION 09E (ISELLE) WARNING NR 015//
RMKS/
1. TROPICAL DEPRESSION 09E (ISELLE) WARNING NR 015
DOWNGRADED FROM TROPICAL STORM 09E
04 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
270000Z --- NEAR 22.8N 125.5W
MOVEMENT PAST SIX HOURS - 290 DEGREES AT 10 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
REPEAT POSIT: 22.8N 125.5W
---
FORECASTS:
12 HRS, VALID AT:
271200Z --- 23.6N 127.2W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 24 HR POSIT: 295 DEG/ 08 KTS
---
24 HRS, VALID AT:
280000Z --- 24.3N 128.8W
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 36 HR POSIT: 290 DEG/ 07 KTS
---
36 HRS, VALID AT:
281200Z --- 24.8N 130.2W
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 48 HR POSIT: 290 DEG/ 07 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
290000Z --- 25.3N 131.6W
MAX SUSTAINED WINDS - 020 KT, GUSTS 030 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
270400Z POSITION NEAR 23.1N 126.1W.
27AUG26. TROPICAL DEPRESSION 09E (ISELLE), LOCATED APPROXIMATELY
742 NM SOUTHWEST OF SAN DIEGO, HAS TRACKED WEST-NORTHWESTWARD AT
10 KNOTS OVER THE PAST SIX HOURS. THIS IS THE FINAL WARNING ON THIS
SYSTEM BY THE JOINT TYPHOON WRNCEN PEARL HARBOR HI. THE SYSTEM WILL
BE CLOSELY MONITORED FOR SIGNS OF REGENERATION. MINIMUM CENTRAL
PRESSURE AT 270000Z IS 1002 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT
270000Z IS 13 FEET. REFER TO TROPICAL STORM 01C (LALA) WARNINGS
(WTPN31 PHNC)FOR SIX-HOURLY UPDATES.//
NNNN


Original Message :

WTPZ44 KNHC 270233
TCDEP4

POST-TROPICAL CYCLONE ISELLE DISCUSSION NUMBER 15
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 PM PDT WED AUG 26 2026

ISELLE CONTINUES TO HAVE NO DEEP CONVECTIVE ORGANIZATION THIS
EVENING WITH THE LOW-LEVEL CENTER STILL FULLY EXPOSED DUE TO DRY AIR
AND MODERATE WIND SHEAR. WITH THE LACK OF CONVECTION OCCURING,
ISELLE IS NOW CONSIDERED TO HAVE BECOME A POST-TROPICAL CYCLONE. THE
MOST RECENT TAFB DVORAK FIX HAS 1.5/25 KT AND THE OBJECTIVE
SATELLITE INTENSITY ESTIMATES ARE IN THE RANGE OF 25-43 KT. BASED ON
THAT DATA, THE CURRENT NHC INITIAL INTENSITY HAS BEEN SET TO 30 KT.

ISELLE SHOULD CONTINUE TO MOVE WEST-NORTHWESTWARD OVER THE NEXT
COUPLE OF DAYS, STEERED BY A MID-LEVEL RIDGE TO THE NORTH OF THE
CYCLONE. INCREASING WIND SHEAR, COOLER SEA SURFACE TEMPERATURES, AND
A DRIER AIR MASS WILL CONTINUE TO WEAKEN THE SYSTEM. THE
POST-TROPICAL REMNANT LOW IS EXPECTED TO GRADUALLY SPIN DOWN
AND OPEN INTO A TROUGH IN ABOUT 2 TO 3 DAYS. HOWEVER, IT STILL
REMAINS POSSIBLE THAT THE CYCLONE COULD SPIN DOWN EVEN SOONER. VERY
MINOR ADJUSTMENTS WERE MADE TO THE PREVIOUS NHC TRACK AND INTENSITY
FORECASTS.

FOR ADDITIONAL INFORMATION ON THE REMNANT LOW PLEASE SEE HIGH SEAS
FORECASTS ISSUED BY THE NATIONAL WEATHER SERVICE, UNDER AWIPS
HEADER NFDHSFEPI, WMO HEADER FZPN01 KWBC, AND ON THE WEB AT
OCEAN.WEATHER.GOV/SHTML/NFDHSFEPI.PHP


FORECAST POSITIONS AND MAX WINDS

INIT 27/0300Z 23.0N 125.9W 30 KT 35 MPH...POST-TROP/REMNT LOW
12H 27/1200Z 23.6N 127.2W 25 KT 30 MPH...POST-TROP/REMNT LOW
24H 28/0000Z 24.3N 128.8W 20 KT 25 MPH...POST-TROP/REMNT LOW
36H 28/1200Z 24.8N 130.2W 20 KT 25 MPH...POST-TROP/REMNT LOW
48H 29/0000Z 25.3N 131.6W 20 KT 25 MPH...POST-TROP/REMNT LOW
60H 29/1200Z...DISSIPATED

$$
FORECASTER KATZ/HAGEN/PAPIN=


Original Message :

WTPZ34 KNHC 270232
TCPEP4

BULLETIN
Post-Tropical Cyclone Iselle Advisory Number 15
NWS National Hurricane Center Miami FL EP092026
800 PM PDT Wed Aug 26 2026

...ISELLE HAS BECOME A POST-TROPICAL CYCLONE...
...THIS IS THE FINAL NHC ADVISORY ON THE SYSTEM...


SUMMARY OF 800 PM PDT...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...23.0N 125.9W
ABOUT 1015 MI...1635 KM W OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...WNW OR 300 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...1002 MB...29.59 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 800 PM PDT (0300 UTC), the center of Post-Tropical Cyclone Iselle
was located near latitude 23.0 North, longitude 125.9 West. The
post-tropical cyclone is moving toward the west-northwest near 9 mph
(15 km/h) and this motion is expected to continue over the next few
days.

Maximum sustained winds are near 35 mph (55 km/h) with higher gusts.
Iselle has become a Post-Tropical Cyclone and is expected to
continue to weaken until it dissipates in a couple of days or less.

The estimated minimum central pressure is 1002 mb (29.59 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle will continue to affect the west
coast of the Baja California Peninsula for a couple more days. These
swells are likely to cause life-threatening surf and rip current
conditions. Please consult products from your local weather office.


NEXT ADVISORY
-------------
This is the last public advisory issued by the National Hurricane
Center on this system. For additional information on the remnant low
please see High Seas Forecasts issued by the National Weather
Service, under AWIPS header NFDHSFEPI, WMO header FZPN01 KWBC, and
on the web at ocean.weather.gov/shtml/NFDHSFEPI.php


$$
Forecaster Katz/Hagen/Papin


Original Message :

WTPZ24 KNHC 270232
TCMEP4

POST-TROPICAL CYCLONE ISELLE FORECAST/ADVISORY NUMBER 15
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
0300 UTC THU AUG 27 2026

POST-TROPICAL CYCLONE CENTER LOCATED NEAR 23.0N 125.9W AT 27/0300Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 300 DEGREES AT 8 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1002 MB
MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT.
4 M SEAS....180NE 90SE 90SW 150NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 23.0N 125.9W AT 27/0300Z
AT 27/0000Z CENTER WAS LOCATED NEAR 22.8N 125.5W

FORECAST VALID 27/1200Z 23.6N 127.2W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

FORECAST VALID 28/0000Z 24.3N 128.8W...POST-TROP/REMNT LOW
MAX WIND 20 KT...GUSTS 30 KT.

FORECAST VALID 28/1200Z 24.8N 130.2W...POST-TROP/REMNT LOW
MAX WIND 20 KT...GUSTS 30 KT.

FORECAST VALID 29/0000Z 25.3N 131.6W...POST-TROP/REMNT LOW
MAX WIND 20 KT...GUSTS 30 KT.

FORECAST VALID 29/1200Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 23.0N 125.9W

THIS IS THE LAST FORECAST/ADVISORY ISSUED BY THE NATIONAL HURRICANE
CENTER ON THIS SYSTEM. FOR ADDITIONAL INFORMATION ON THE REMNANT LOW
PLEASE SEE HIGH SEAS FORECASTS ISSUED BY THE NATIONAL WEATHER
SERVICE...UNDER AWIPS HEADER NFDHSFEPI AND WMO HEADER FZPN01 KWBC.


$$
FORECASTER KATZ/HAGEN/PAPIN=


Original Message :

WTPN33 PHNC 262200
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 014//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 014
04 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
261800Z --- NEAR 22.5N 124.5W
MOVEMENT PAST SIX HOURS - 305 DEGREES AT 10 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROPICAL
RADIUS OF 034 KT WINDS - 160 NM NORTHEAST QUADRANT
130 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
100 NM NORTHWEST QUADRANT
REPEAT POSIT: 22.5N 124.5W
---
FORECASTS:
12 HRS, VALID AT:
270600Z --- 23.2N 126.2W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 295 DEG/ 09 KTS
---
24 HRS, VALID AT:
271800Z --- 23.9N 127.9W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 36 HR POSIT: 295 DEG/ 09 KTS
---
36 HRS, VALID AT:
280600Z --- 24.6N 129.6W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 48 HR POSIT: 300 DEG/ 08 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
281800Z --- 25.3N 131.1W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATING AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
262200Z POSITION NEAR 22.7N 125.1W.
26AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 727
NM SOUTHWEST OF SAN DIEGO, HAS TRACKED NORTHWESTWARD AT 10 KNOTS
OVER THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 261800Z IS 1000
MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT 261800Z IS 20 FEET. NEXT
WARNINGS AT 270400Z, 271000Z, 271600Z AND 272200Z. REFER TO TROPICAL
DEPRESSION 01C (LALA) WARNINGS (WTPN31 PHNC) FOR SIX-HOURLY UPDATES.
//
NNNN


Original Message :

WTPZ34 KNHC 262034
TCPEP4

BULLETIN
TROPICAL STORM ISELLE ADVISORY NUMBER 14
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
200 PM PDT WED AUG 26 2026

...ISELLE CONTINUES TO WEAKEN...
...FORECAST TO BECOME A POST-TROPICAL CYCLONE TONIGHT...


SUMMARY OF 200 PM PDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...22.7N 124.9W
ABOUT 955 MI...1535 KM W OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...40 MPH...65 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES


WATCHES AND WARNINGS
--------------------
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.


DISCUSSION AND OUTLOOK
----------------------
AT 200 PM PDT (2100 UTC), THE CENTER OF TROPICAL STORM ISELLE WAS
LOCATED NEAR LATITUDE 22.7 NORTH, LONGITUDE 124.9 WEST. ISELLE IS
MOVING TOWARD THE WEST-NORTHWEST NEAR 10 MPH (17 KM/H) AND THIS
GENERAL MOTION IS EXPECTED TO CONTINUE OVER THE NEXT FEW DAYS.

MAXIMUM SUSTAINED WINDS ARE NEAR 40 MPH (65 KM/H) WITH HIGHER GUSTS.
STEADY WEAKENING IS EXPECTED, AND ISELLE IS FORECAST TO BECOME A
POST-TROPICAL REMNANT LOW BY TONIGHT.

TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 160 MILES (260 KM)
FROM THE CENTER.

THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 1003 MB (29.62 INCHES).


HAZARDS AFFECTING LAND
----------------------
SURF: SWELLS GENERATED BY ISELLE WILL CONTINUE TO AFFECT THE WEST
COAST OF THE BAJA CALIFORNIA PENINSULA FOR A COUPLE MORE DAYS. THESE
SWELLS ARE LIKELY TO CAUSE LIFE-THREATENING SURF AND RIP CURRENT
CONDITIONS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.


NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY AT 800 PM PDT.

$$
FORECASTER KELLY=


Original Message :

WTPZ44 KNHC 262035
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 14
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
200 PM PDT WED AUG 26 2026

DEEP CONVECTION REMAINS LIMITED THIS AFTERNOON WITH ISELLE, AND ITS
TIME AS A TROPICAL CYCLONE IS LIMITED. THE LOW-LEVEL CENTER REMAINS
FULLY EXPOSED AS THE SYSTEM DEALS WITH DRY AIR AND MODERATE WIND
SHEAR. A RECENT SCATTEROMETER PASS, WHICH SHOWED A PEAK WIND OF 34
KT, WAS HELPFUL IN ADJUSTING THE WIND RADII AS THE SYSTEM CONTINUES
TO WEAKEN. SUBJECTIVE AND OBJECTIVE SATELLITE INTENSITY ESTIMATES
ALSO CONTINUE TO TREND DOWNWARD. BASED ON THE SCATTEROMETER DATA AND
THE DETERIORATING SATELLITE APPEARANCE, THE INITIAL INTENSITY IS
LOWERED TO 35 KT.

ISELLE IS EXPECTED TO CONTINUE MOVING WEST-NORTHWESTWARD OVER THE
NEXT FEW DAYS, STEERED BY A MID-LEVEL RIDGE TO THE NORTH. INCREASING
WIND SHEAR, COOLER SEA SURFACE TEMPERATURES, AND A DRIER AIR MASS
WILL CONTINUE TO WEAKEN THE CYCLONE. THE LATEST NHC FORECAST FOLLOWS
THESE TRENDS AND INDICATES ISELLE WILL LIKELY BECOME A POST-TROPICAL
CYCLONE TONIGHT. THE POST-TROPICAL/REMNANT LOW IS THEN EXPECTED TO
GRADUALLY SPIN DOWN AND OPEN INTO A TROUGH IN ABOUT 2 TO 3 DAYS.
VERY MINOR ADJUSTMENTS WERE MADE TO THE PREVIOUS NHC TRACK AND
INTENSITY FORECASTS.


FORECAST POSITIONS AND MAX WINDS

INIT 26/2100Z 22.7N 124.9W 35 KT 40 MPH
12H 27/0600Z 23.2N 126.2W 35 KT 40 MPH...POST-TROPICAL
24H 27/1800Z 23.9N 127.9W 30 KT 35 MPH...POST-TROP/REMNT LOW
36H 28/0600Z 24.6N 129.6W 30 KT 35 MPH...POST-TROP/REMNT LOW
48H 28/1800Z 25.3N 131.1W 25 KT 30 MPH...POST-TROP/REMNT LOW
60H 29/0600Z...DISSIPATED

$$
FORECASTER KELLY=


Original Message :

WTPZ24 KNHC 262033
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 14
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
2100 UTC WED AUG 26 2026

TROPICAL STORM CENTER LOCATED NEAR 22.7N 124.9W AT 26/2100Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 295 DEGREES AT 9 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1003 MB
MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT.
34 KT.......140NE 0SE 0SW 90NW.
4 M SEAS....180NE 90SE 90SW 150NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 22.7N 124.9W AT 26/2100Z
AT 26/1800Z CENTER WAS LOCATED NEAR 22.5N 124.5W

FORECAST VALID 27/0600Z 23.2N 126.2W...POST-TROPICAL
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 80NE 0SE 0SW 40NW.

FORECAST VALID 27/1800Z 23.9N 127.9W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/0600Z 24.6N 129.6W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/1800Z 25.3N 131.1W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

FORECAST VALID 29/0600Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 22.7N 124.9W

NEXT ADVISORY AT 27/0300Z

$$
FORECASTER KELLY=


Original Message :

WTPN33 PHNC 261600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 013//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 013
01 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
261200Z --- NEAR 21.9N 123.6W
MOVEMENT PAST SIX HOURS - 300 DEGREES AT 08 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 200 NM NORTHEAST QUADRANT
170 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
120 NM NORTHWEST QUADRANT
REPEAT POSIT: 21.9N 123.6W
---
FORECASTS:
12 HRS, VALID AT:
270000Z --- 22.5N 125.3W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROPICAL
RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 295 DEG/ 09 KTS
---
24 HRS, VALID AT:
271200Z --- 23.2N 127.0W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 36 HR POSIT: 295 DEG/ 09 KTS
---
36 HRS, VALID AT:
280000Z --- 23.9N 128.8W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 48 HR POSIT: 290 DEG/ 09 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
281200Z --- 24.5N 130.7W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 60 HR POSIT: 290 DEG/ 08 KTS
---
60 HRS, VALID AT:
290000Z --- 25.0N 132.4W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
---
REMARKS:
261600Z POSITION NEAR 22.1N 124.2W.
26AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 734
NM SOUTH-SOUTHWEST OF SAN DIEGO, HAS TRACKED WEST-NORTHWESTWARD
AT 08 KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 261200Z IS 999 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 261200Z IS 15 FEET. NEXT WARNINGS AT
262200Z, 270400Z, 271000Z AND 271600Z.//
NNNN


Original Message :

WTPZ34 KNHC 261433
TCPEP4

BULLETIN
TROPICAL STORM ISELLE ADVISORY NUMBER 13
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 AM PDT WED AUG 26 2026

...ISELLE WEAKENS...
...FORECAST TO BECOME A POST-TROPICAL CYCLONE TONIGHT...


SUMMARY OF 800 AM PDT...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...22.2N 124.0W
ABOUT 900 MI...1450 KM W OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES


WATCHES AND WARNINGS
--------------------
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.


DISCUSSION AND OUTLOOK
----------------------
AT 800 AM PDT (1500 UTC), THE CENTER OF TROPICAL STORM ISELLE WAS
LOCATED NEAR LATITUDE 22.2 NORTH, LONGITUDE 124.0 WEST. ISELLE IS
MOVING TOWARD THE WEST-NORTHWEST NEAR 9 MPH (15 KM/H) AND THIS
GENERAL MOTION IS EXPECTED TO CONTINUE OVER THE NEXT FEW DAYS.

MAXIMUM SUSTAINED WINDS ARE NEAR 45 MPH (75 KM/H) WITH HIGHER GUSTS.
STEADY WEAKENING IS EXPECTED, AND ISELLE IS FORECAST TO BECOME A
POST-TROPICAL REMNANT LOW BY TONIGHT.

TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 230 MILES (370 KM)
FROM THE CENTER.

THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 999 MB (29.50 INCHES).


HAZARDS AFFECTING LAND
----------------------
SURF: SWELLS GENERATED BY ISELLE WILL CONTINUE TO AFFECT THE WEST
COAST OF THE BAJA CALIFORNIA PENINSULA FOR A COUPLE MORE DAYS. THESE
SWELLS ARE LIKELY TO CAUSE LIFE-THREATENING SURF AND RIP CURRENT
CONDITIONS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.


NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY AT 200 PM PDT.

$$
FORECASTER KELLY=


Original Message :

WTPZ44 KNHC 261434
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 13
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 AM PDT WED AUG 26 2026

WIND SHEAR AND DRY AIR CONTINUE TO TAKE A TOLL ON ISELLE THIS
MORNING. THE LOW-LEVEL CENTER IS FULLY EXPOSED, WITH WHAT LITTLE
DEEP CONVECTION REMAINS DISPLACED OVER 100 N MI TO THE NORTHEAST.
EARLIER SCATTEROMETER DATA INDICATED WINDS WERE STILL AROUND 40 TO
45 KT. HOWEVER, GIVEN THE RECENT DEGRADATION IN SATELLITE APPEARANCE
AND DECREASING SUBJECTIVE AND OBJECTIVE INTENSITY ESTIMATES, THE
INITIAL INTENSITY IS LOWERED TO 40 KT FOR THIS ADVISORY.

ISELLE IS EXPECTED TO CONTINUE MOVING WEST-NORTHWESTWARD OVER THE
NEXT FEW DAYS, STEERED BY A MID-LEVEL RIDGE TO THE NORTH. INCREASING
WIND SHEAR, COOLER SEA SURFACE TEMPERATURES, AND A DRIER AIR MASS
WILL CONTINUE TO WEAKEN THE CYCLONE, AND IT IS LIKELY TO BECOME
DEVOID OF DEEP CONVECTION BY TONIGHT. THE LATEST NHC FORECAST
FOLLOWS THESE TRENDS AND INDICATES ISELLE WILL BECOME A
POST-TROPICAL CYCLONE TONIGHT. THE REMNANT LOW IS THEN EXPECTED TO
GRADUALLY SPIN DOWN AND OPEN INTO A TROUGH BY DAY 3. THE TRACK AND
INTENSITY FORECASTS ARE SIMILAR TO THE PREVIOUS ADVISORY, WITH ONLY
MINOR ADJUSTMENTS MADE TOWARD THE CONSENSUS AIDS.


FORECAST POSITIONS AND MAX WINDS

INIT 26/1500Z 22.2N 124.0W 40 KT 45 MPH
12H 27/0000Z 22.5N 125.3W 35 KT 40 MPH...POST-TROPICAL
24H 27/1200Z 23.2N 127.0W 30 KT 35 MPH...POST-TROP/REMNT LOW
36H 28/0000Z 23.9N 128.8W 30 KT 35 MPH...POST-TROP/REMNT LOW
48H 28/1200Z 24.5N 130.7W 25 KT 30 MPH...POST-TROP/REMNT LOW
60H 29/0000Z 25.0N 132.4W 25 KT 30 MPH...POST-TROP/REMNT LOW
72H 29/1200Z...DISSIPATED

$$
FORECASTER KELLY=


Original Message :

WTPZ24 KNHC 261433
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 13
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
1500 UTC WED AUG 26 2026

TROPICAL STORM CENTER LOCATED NEAR 22.2N 124.0W AT 26/1500Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 295 DEGREES AT 8 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 999 MB
MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT.
34 KT.......200NE 170SE 60SW 120NW.
4 M SEAS....180NE 90SE 90SW 150NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 22.2N 124.0W AT 26/1500Z
AT 26/1200Z CENTER WAS LOCATED NEAR 21.9N 123.6W

FORECAST VALID 27/0000Z 22.5N 125.3W...POST-TROPICAL
MAX WIND 35 KT...GUSTS 45 KT.
34 KT...110NE 80SE 30SW 70NW.

FORECAST VALID 27/1200Z 23.2N 127.0W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/0000Z 23.9N 128.8W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/1200Z 24.5N 130.7W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

FORECAST VALID 29/0000Z 25.0N 132.4W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

FORECAST VALID 29/1200Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 22.2N 124.0W

NEXT ADVISORY AT 26/2100Z

$$
FORECASTER KELLY=


Original Message :

WTPN33 PHNC 261000
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 012//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 012
01 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
260600Z --- NEAR 21.5N 122.9W
MOVEMENT PAST SIX HOURS - 300 DEGREES AT 08 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 200 NM NORTHEAST QUADRANT
170 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
120 NM NORTHWEST QUADRANT
REPEAT POSIT: 21.5N 122.9W
---
FORECASTS:
12 HRS, VALID AT:
261800Z --- 22.2N 124.6W
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 290 DEG/ 09 KTS
---
24 HRS, VALID AT:
270600Z --- 22.8N 126.4W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROPICAL
RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
050 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 290 DEG/ 09 KTS
---
36 HRS, VALID AT:
271800Z --- 23.5N 128.3W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 48 HR POSIT: 280 DEG/ 09 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
280600Z --- 23.8N 130.2W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 60 HR POSIT: 285 DEG/ 09 KTS
---
60 HRS, VALID AT:
281800Z --- 24.3N 132.1W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
---
REMARKS:
261000Z POSITION NEAR 21.7N 123.5W.
26AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 740
NM SOUTH-SOUTHWEST OF SAN DIEGO, HAS TRACKED WEST-NORTHWESTWARD
AT 08 KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 260600Z IS 996 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 260600Z IS 18 FEET. NEXT WARNINGS AT
261600Z, 262200Z, 270400Z AND 271000Z.//
NNNN


0000400500
00001


Original Message :

WTPZ44 KNHC 260838
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 12
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
200 AM PDT WED AUG 26 2026

MODERATE NORTHERLY WIND SHEAR AND DRY AIR ENTRAINMENT ARE AFFECTING
ISELLE THIS MORNING. AN EARLIER GPM MICROWAVE PASS INDICATED THAT
THE CIRCULATION IS BETTER ESTABLISHED TO THE NORTH AND EAST OF THE
CENTER, WITH LESS DEFINITION ON THE SOUTHERN AND WESTERN SIDES. THIS
STRUCTURE IS CONSISTENT WITH INFRARED SATELLITE IMAGERY, WHICH SHOWS
SHOWER AND THUNDERSTORM ACTIVITY CONCENTRATED PRIMARILY NORTHEAST OF
THE CENTER. HOWEVER, A RECENT ASCAT SCATTEROMETER PASS INDICATED
THAT WINDS OF 40-45 KT REMAIN PRESENT IN THE NORTHEASTERN QUADRANT.
THE 0600 UTC DVORAK INTENSITY ESTIMATE FROM TAFB WAS 3.0/45 KT,
WHILE OBJECTIVE INTENSITY ESTIMATES FROM UW-CIMSS RANGE FROM 26-44
KT. GIVEN THE SCATTEROMETER DATA AND SUBJECTIVE DVORAK ESTIMATE,
THE INTENSITY IS SET AT 45 KT FOR THIS ADVISORY.

ISELLE WILL CONTINUE ON A WEST-NORTHWESTWARD HEADING OVER THE NEXT
COUPLE OF DAYS AS A RIDGE BUILDS TO THE NORTH OF THE CYCLONE.
INCREASING WIND SHEAR, COOLER SEA SURFACE TEMPERATURES AND DRIER
MID-LEVEL AIR WILL PROMOTE GRADUAL WEAKENING THROUGH LATE THIS WEEK,
AND ISELLE MAY STRUGGLE TO MAINTAIN ORGANIZED CONVECTION AS EARLY AS
TONIGHT. THE LATEST NHC FORECAST CALLS FOR ISELLE TO BECOME
POST-TROPICAL BY 24 H AND DEGENERATE TO A REMNANT LOW BY 36 H. ONLY
MINOR ADJUSTMENTS WERE MADE TO THE TRACK AND INTENSITY FORECASTS FOR
THIS ADVISORY CYCLE.


FORECAST POSITIONS AND MAX WINDS

INIT 26/0900Z 21.8N 123.5W 45 KT 50 MPH
12H 26/1800Z 22.2N 124.6W 40 KT 45 MPH
24H 27/0600Z 22.8N 126.4W 35 KT 40 MPH...POST-TROPICAL
36H 27/1800Z 23.5N 128.3W 30 KT 35 MPH...POST-TROP/REMNT LOW
48H 28/0600Z 23.8N 130.2W 25 KT 30 MPH...POST-TROP/REMNT LOW
60H 28/1800Z 24.3N 132.1W 25 KT 30 MPH...POST-TROP/REMNT LOW
72H 29/0600Z...DISSIPATED

$$
FORECASTER ADAMS=


Original Message :

WTPZ34 KNHC 260836
TCPEP4

BULLETIN
Tropical Storm Iselle Advisory Number 12
NWS National Hurricane Center Miami FL EP092026
200 AM PDT Wed Aug 26 2026

...ISELLE DRIFTING WEST-NORTHWESTWARD...


SUMMARY OF 200 AM PDT...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...21.8N 123.5W
ABOUT 870 MI...1405 KM W OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...996 MB...29.42 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 200 AM PDT (0900 UTC), the center of Tropical Storm Iselle was
located near latitude 21.8 North, longitude 123.5 West. Iselle is
moving toward the west-northwest near 9 mph (15 km/h), and this
general motion is expected to continue over the next few days.

Maximum sustained winds are near 50 mph (85 km/h) with higher gusts.
Steady weakening is expected, and Iselle is forecast to become a
post-tropical remnant low by early Thursday.

Tropical-storm-force winds extend outward up to 230 miles (370 km)
from the center.

The estimated minimum central pressure is 996 mb (29.42 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle will continue to affect the west
coast of the Baja California Peninsula for a couple more days. These
swells are likely to cause life-threatening surf and rip current
conditions. Please consult products from your local weather office.


NEXT ADVISORY
-------------
Next complete advisory at 800 AM PDT.

$$
Forecaster Adams


Original Message :

WTPZ24 KNHC 260836
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 12
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
0900 UTC WED AUG 26 2026

TROPICAL STORM CENTER LOCATED NEAR 21.8N 123.5W AT 26/0900Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 295 DEGREES AT 8 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 996 MB
MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT.
34 KT.......200NE 170SE 60SW 120NW.
4 M SEAS....180NE 180SE 120SW 180NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 21.8N 123.5W AT 26/0900Z
AT 26/0600Z CENTER WAS LOCATED NEAR 21.5N 122.9W

FORECAST VALID 26/1800Z 22.2N 124.6W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT...130NE 100SE 40SW 70NW.

FORECAST VALID 27/0600Z 22.8N 126.4W...POST-TROPICAL
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 70NE 60SE 0SW 50NW.

FORECAST VALID 27/1800Z 23.5N 128.3W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/0600Z 23.8N 130.2W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

FORECAST VALID 28/1800Z 24.3N 132.1W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

FORECAST VALID 29/0600Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.8N 123.5W

NEXT ADVISORY AT 26/1500Z

$$
FORECASTER ADAMS=


Original Message :

WTPN33 PHNC 260400
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 011//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 011
02 ACTIVE TROPICAL CYCLONES IN CENTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
260000Z --- NEAR 21.1N 122.1W
MOVEMENT PAST SIX HOURS - 285 DEGREES AT 07 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 200 NM NORTHEAST QUADRANT
170 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
120 NM NORTHWEST QUADRANT
REPEAT POSIT: 21.1N 122.1W
---
FORECASTS:
12 HRS, VALID AT:
261200Z --- 21.6N 123.7W
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 295 DEG/ 09 KTS
---
24 HRS, VALID AT:
270000Z --- 22.3N 125.5W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
020 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 290 DEG/ 09 KTS
---
36 HRS, VALID AT:
271200Z --- 22.9N 127.4W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 48 HR POSIT: 285 DEG/ 10 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
280000Z --- 23.4N 129.4W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 60 HR POSIT: 285 DEG/ 09 KTS
---
60 HRS, VALID AT:
281200Z --- 23.8N 131.4W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
---
REMARKS:
260400Z POSITION NEAR 21.3N 122.6W.
26AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 745
NM SOUTH-SOUTHWEST OF SAN DIEGO, HAS TRACKED WEST-NORTHWESTWARD
AT 07 KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 260000Z IS 996 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 260000Z IS 18 FEET. NEXT WARNINGS AT
261000Z, 261600Z, 262200Z AND 270400Z.
REFER TO TROPICAL CYCLONE 10E (JULIO) FINAL WARNING (WTPN31 PHNC)
//
NNNN


Original Message :

WTPZ34 KNHC 260231
TCPEP4

BULLETIN
TROPICAL STORM ISELLE ADVISORY NUMBER 11
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 PM PDT TUE AUG 25 2026

...ISELLE WEAKENS SLIGHTLY...


SUMMARY OF 800 PM PDT...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...21.3N 122.5W
ABOUT 815 MI...1310 KM W OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...996 MB...29.42 INCHES


WATCHES AND WARNINGS
--------------------
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.


DISCUSSION AND OUTLOOK
----------------------
AT 800 PM PDT (0300 UTC), THE CENTER OF TROPICAL STORM ISELLE WAS
LOCATED NEAR LATITUDE 21.3 NORTH, LONGITUDE 122.5 WEST. ISELLE IS
MOVING TOWARD THE WEST-NORTHWEST NEAR 9 MPH (15 KM/H), AND THIS
GENERAL MOTION IS EXPECTED FOR THE NEXT COUPLE OF DAYS, WITH A TURN
TOWARDS THE WEST POSSIBLE LATE ON WEDNESDAY.

MAXIMUM SUSTAINED WINDS HAVE DECREASED TO NEAR 50 MPH (85 KM/H) WITH
HIGHER GUSTS. WEAKENING IS FORECAST, AND ISELLE COULD BECOME A
POST-TROPICAL CYCLONE ON THURSDAY.

TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 230 MILES (370 KM)
FROM THE CENTER.

THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 996 MB (29.42 INCHES).


HAZARDS AFFECTING LAND
----------------------
SURF: SWELLS GENERATED BY ISELLE ARE AFFECTING THE WEST COAST OF THE
BAJA CALIFORNIA PENINSULA, AND WILL CONTINUE FOR A COUPLE MORE DAYS.
THESE SWELLS ARE LIKELY TO CAUSE LIFE-THREATENING SURF AND RIP
CURRENT CONDITIONS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER
OFFICE.


NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY AT 200 AM PDT.

$$
FORECASTER KATZ/PAPIN=


Original Message :

WTPZ44 KNHC 260232
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 11
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 PM PDT TUE AUG 25 2026

SATELLITE IMAGERY INDICATES THAT ISELLE CONTINUES TO BE SHEARED AND
THAT THE LOW-LEVEL CIRCULATION IS BECOMING MORE DETACHED FROM THE
MID-LEVEL CENTER. AS SUCH, THE DEEP CONVECTION IS STILL LOCATED AWAY
FROM THE CENTER OF THE STORM, WHICH IS A STRONG INDICATION THAT THE
CYCLONE IS CONTINUING TO WEAKEN. WATER VAPOR IMAGERY ALSO SHOWS THAT
DRY AIR IS INTRUDING FAR INTO THE CORE OF THE CYCLONE AS WELL. WHILE
THE MOST RECENT SUBJECTIVE DVORAK INTENSITY ESTIMATE FROM TAFB WAS
AT CI 3.5/55 KT, THE OBJECTIVE UW-CMISS ESTIMATES ARE LOWER AND
RANGE FROM 33-45 KT. THUS, BASED ON THE AVAILABLE DATA, THE INITIAL
INTENSITY HAS BEEN SET TO 45 KT FOR THIS ADVISORY.

FURTHER WEAKENING IS ANTICIPATED DUE TO CONTINUED SHEAR,
PROGRESSIVELY COOLER WATER AND INCREASING DRY AIR ENTRAINMENT NEAR
THE CORE OF THE CYCLONE. THE GFS AND ECMWF SIMULATED SATELLITE
IMAGERY SHOW THE CYCLONE BECOMING DEVOID OF ORGANIZED DEEP
CONVECTION IN 24 TO 36 H. GIVEN THE CURRENT APPEARANCE OF THE
STORM, IT IS POSSIBLE THAT ISELLE COULD BECOME A POST-TROPICAL
REMNANT LOW SOONER AND DISSIPATE FASTER THAN INDICATED IN THE
FORECAST. THE CURRENT NHC INTENSITY FORECAST IS VERY SIMILAR TO THE
PREVIOUS ONE, WITH MINOR ADJUSTMENTS TOWARDS THE END OF THE
FORECAST PERIOD.

TRENDS FROM THE MOST RECENT SATELLITE FIXES SHOW THAT THE ISELLE
CONTINUES TO MOVE TO THE WEST-NORTHWEST AROUND 7 KT. A RIDGE FROM
THE SOUTHERN UNITED STATES IS EXPECTED TO EXTEND WESTWARD AND SHOULD
KEEP THE SYSTEM MOVING TOWARDS THE WEST-NORTHWEST. AS THE STORM
WEAKENS, IT SHOULD TURN MORE WESTWARD DUE TO THE LOW-LEVEL FLOW
STEERING THE SHALLOW CYCLONE. THE CURRENT NHC TRACK IS VERY SIMILIAR
TO THE PREVIOUS TRACK, WITH ONLY SLIGHT ADJUSTMENTS TO THE PREVIOUS
FORECAST.

FORECAST POSITIONS AND MAX WINDS

INIT 26/0300Z 21.3N 122.5W 45 KT 50 MPH
12H 26/1200Z 21.6N 123.7W 40 KT 45 MPH
24H 27/0000Z 22.3N 125.5W 35 KT 40 MPH
36H 27/1200Z 22.9N 127.4W 30 KT 35 MPH...POST-TROP/REMNT LOW
48H 28/0000Z 23.4N 129.4W 25 KT 30 MPH...POST-TROP/REMNT LOW
60H 28/1200Z 23.8N 131.4W 25 KT 30 MPH...POST-TROP/REMNT LOW
72H 29/0000Z...DISSIPATED

$$
FORECASTER KATZ/PAPIN=


Original Message :

WTPZ24 KNHC 260231
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 11
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
0300 UTC WED AUG 26 2026

TROPICAL STORM CENTER LOCATED NEAR 21.3N 122.5W AT 26/0300Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 8 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 996 MB
MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT.
34 KT.......200NE 170SE 60SW 120NW.
4 M SEAS....210NE 270SE 120SW 210NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 21.3N 122.5W AT 26/0300Z
AT 26/0000Z CENTER WAS LOCATED NEAR 21.1N 122.1W

FORECAST VALID 26/1200Z 21.6N 123.7W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT...140NE 60SE 40SW 80NW.

FORECAST VALID 27/0000Z 22.3N 125.5W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 80NE 20SE 0SW 70NW.

FORECAST VALID 27/1200Z 22.9N 127.4W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/0000Z 23.4N 129.4W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

FORECAST VALID 28/1200Z 23.8N 131.4W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

FORECAST VALID 29/0000Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.3N 122.5W

NEXT ADVISORY AT 26/0900Z

$$
FORECASTER KATZ/PAPIN=


Original Message :

WTPN33 PHNC 252200
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 010//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 010
02 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
251800Z --- NEAR 20.9N 121.4W
MOVEMENT PAST SIX HOURS - 285 DEGREES AT 08 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 090 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 200 NM NORTHEAST QUADRANT
170 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
120 NM NORTHWEST QUADRANT
REPEAT POSIT: 20.9N 121.4W
---
FORECASTS:
12 HRS, VALID AT:
260600Z --- 21.3N 123.0W
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 170 NM NORTHEAST QUADRANT
140 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 290 DEG/ 08 KTS
---
24 HRS, VALID AT:
261800Z --- 21.8N 124.7W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
020 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 290 DEG/ 09 KTS
---
36 HRS, VALID AT:
270600Z --- 22.4N 126.6W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 48 HR POSIT: 290 DEG/ 10 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
271800Z --- 23.0N 128.7W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 60 HR POSIT: 285 DEG/ 09 KTS
---
60 HRS, VALID AT:
280600Z --- 23.5N 130.6W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
252200Z POSITION NEAR 21.0N 121.9W.
25AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 744
NM SOUTH-SOUTHWEST OF SAN DIEGO, HAS TRACKED WEST-NORTHWESTWARD
AT 08 KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 251800Z IS 994 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 251800Z IS 18 FEET. NEXT WARNINGS AT
260400Z, 261000Z, 261600Z AND 262200Z.
REFER TO TROPICAL DEPRESSION 01C (LALA) WARNINGS (WTPN31 PHNC)
FOR SIX-HOURLY UPDATES.
REFER TO TROPICAL CYCLONE 10E (JULIO) FINAL WARNING (WTPN31 PHNC).
//
NNNN


Original Message :

WTPZ44 KNHC 252041
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 10
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
200 PM PDT TUE AUG 25 2026

THE STRUCTURE OF ISELLE HAS SIGNIFICANTLY DEGRADED DURING THE PAST
SEVERAL HOURS, WITH THE LOW-LEVEL CIRCULATION FURTHER DETACHING
FROM THE MID-LEVEL CENTER LOCATED WELL TO THE NORTHEAST. THIS
CHANGE HAS CAUSED ANY DEEP CONVECTION TO BE LOCATED WELL AWAY FROM
THE CENTER NEAR THE OLD MID-LEVEL CENTER AND IS REPRESENTATIVE OF
A WEAKENING CYCLONE. A RECENT ASCAT SCATTEROMETER PASS SHOWED PEAK
WINDS OF ABOUT 45 KT, SO THE INITIAL INTENSITY IS SET TO 50 KT,
CONSISTENT WITH THE LOW BIAS OF THE INSTRUMENT.

FURTHER WEAKENING IS ANTICIPATED DUE TO CONTINUED SHEAR,
PROGRESSIVELY COOLER WATER AND DRY AIR ENTRAINMENT NEAR THE CORE OF
THE CYCLONE. PERHAPS BECAUSE OF THE POOR INITIAL STRUCTURE,
ISELLE ISN'T EXPECTED TO BE A PARTICULARLY RESILIENT CYCLONE, AND
NO MODEL SHOWS ORGANIZED DEEP CONVECTION BEYOND 36 HOURS. THE NEW
NHC INTENSITY FORECAST IS LOWER THAN THE LAST ONE, KEEPING THE SAME
GENERAL RATE OF WEAKENING, BUT IT SHOWS A MUCH EARLIER TRANSITION
INTO A REMNANT LOW.

SATELLITE FIXES SHOW THAT THE STORM CONTINUES TO MOVE TO THE
WEST-NORTHWEST, AND LITTLE CHANGE IN TRACK IS ANTICIPATED FOR THE
NEXT COUPLE OF DAYS DUE TO RIDGING EXTENDING FROM THE SOUTHERN
UNITED STATES. AS THE STORM WEAKENS, IT SHOULD TURN MORE WESTWARD
BY THURSDAY DUE TO THE CYCLONE BECOMING STEERED MORE BY THE
LOW-LEVEL FLOW. THE GUIDANCE IS SHIFTING SOUTHWARD, CONSISTENT
WITH A DECAYING SYSTEM, SO THE NEW FORECAST IS SHIFTED EQUATORWARD,
CLOSEST TO THE GOOGLE DEEPMIND ENSEMBLE MEAN.


FORECAST POSITIONS AND MAX WINDS

INIT 25/2100Z 21.0N 121.8W 50 KT 60 MPH
12H 26/0600Z 21.3N 123.0W 40 KT 45 MPH
24H 26/1800Z 21.8N 124.7W 35 KT 40 MPH
36H 27/0600Z 22.4N 126.6W 30 KT 35 MPH...POST-TROP/REMNT LOW
48H 27/1800Z 23.0N 128.7W 30 KT 35 MPH...POST-TROP/REMNT LOW
60H 28/0600Z 23.5N 130.6W 25 KT 30 MPH...POST-TROP/REMNT LOW
72H 28/1800Z...DISSIPATED

$$
FORECASTER BLAKE/EVANS=


Original Message :

WTPZ34 KNHC 252040
TCPEP4

BULLETIN
Tropical Storm Iselle Advisory Number 10
NWS National Hurricane Center Miami FL EP092026
200 PM PDT Tue Aug 25 2026

...ISELLE LIKELY TO FURTHER WEAKEN THIS WEEK...


SUMMARY OF 200 PM PDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...21.0N 121.8W
ABOUT 775 MI...1245 KM W OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 9 MPH...15 KM/H
MINIMUM CENTRAL PRESSURE...994 MB...29.36 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 200 PM PDT (2100 UTC), the center of Tropical Storm Iselle was
located near latitude 21.0 North, longitude 121.8 West. Iselle is
moving toward the west-northwest near 9 mph (15 km/h), and this
general motion is expected for the next couple of days, with a turn
towards the west possible late on Wednesday.

Maximum sustained winds are near 60 mph (95 km/h) with higher gusts.
Weakening is forecast, and Iselle could become a post-tropical
cyclone on Wednesday.

Tropical-storm-force winds extend outward up to 230 miles (370 km)
from the center.

The estimated minimum central pressure is 994 mb (29.36 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle are affecting the west coast of the
Baja California Peninsula, and will continue for a couple more days.
These swells are likely to cause life-threatening surf and rip
current conditions. Please consult products from your local weather
office.


NEXT ADVISORY
-------------
Next complete advisory at 800 PM PDT.

$$
Forecaster Blake/Evans


Original Message :

WTPZ24 KNHC 252040
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 10
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
2100 UTC TUE AUG 25 2026

TROPICAL STORM CENTER LOCATED NEAR 21.0N 121.8W AT 25/2100Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 285 DEGREES AT 8 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 994 MB
MAX SUSTAINED WINDS 50 KT WITH GUSTS TO 60 KT.
50 KT....... 90NE 0SE 0SW 90NW.
34 KT.......200NE 170SE 60SW 120NW.
4 M SEAS....210NE 200SE 120SW 180NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 21.0N 121.8W AT 25/2100Z
AT 25/1800Z CENTER WAS LOCATED NEAR 20.9N 121.4W

FORECAST VALID 26/0600Z 21.3N 123.0W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT...170NE 140SE 40SW 90NW.

FORECAST VALID 26/1800Z 21.8N 124.7W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT...100NE 60SE 20SW 70NW.

FORECAST VALID 27/0600Z 22.4N 126.6W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 27/1800Z 23.0N 128.7W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/0600Z 23.5N 130.6W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

FORECAST VALID 28/1800Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.0N 121.8W

NEXT ADVISORY AT 26/0300Z

$$
FORECASTER BLAKE/EVANS=


Original Message :

WTPN33 PHNC 251600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 009//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 009
02 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
251200Z --- NEAR 20.8N 120.7W
MOVEMENT PAST SIX HOURS - 295 DEGREES AT 11 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 080 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
050 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
180 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
REPEAT POSIT: 20.8N 120.7W
---
FORECASTS:
12 HRS, VALID AT:
260000Z --- 21.4N 122.5W
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
150 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 290 DEG/ 08 KTS
---
24 HRS, VALID AT:
261200Z --- 22.0N 124.1W
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
110 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 290 DEG/ 09 KTS
---
36 HRS, VALID AT:
270000Z --- 22.7N 126.0W
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
020 NM SOUTHWEST QUADRANT
050 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 290 DEG/ 09 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
271200Z --- 23.3N 127.9W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
VECTOR TO 60 HR POSIT: 285 DEG/ 09 KTS
---
60 HRS, VALID AT:
280000Z --- 23.8N 129.8W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
VECTOR TO 72 HR POSIT: 285 DEG/ 08 KTS
---
72 HRS, VALID AT:
281200Z --- 24.2N 131.6W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
251600Z POSITION NEAR 21.0N 121.3W.
25AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 739
NM SOUTH-SOUTHWEST OF SAN DIEGO, HAS TRACKED WEST-NORTHWESTWARD
AT 11 KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 251200Z IS 988 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 251200Z IS 19 FEET. NEXT WARNINGS AT
252200Z, 260400Z, 261000Z AND 261600Z.
REFER TO TROPICAL STORM 10E (JULIO) WARNINGS (WTPN34 PHNC)
FOR SIX-HOURLY UPDATES.//
NNNN


Original Message :

WTPZ44 KNHC 251444
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 9
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 AM PDT TUE AUG 25 2026

ISELLE CONTINUES TO PRODUCE A LARGE AREA OF DEEP CONVECTION NEAR
AND WELL NORTHEAST OF THE CENTER. A GCOM-AMSR2 MICROWAVE
PASS FROM A FEW HOURS AGO SHOWED THAT THE SYSTEM IS ON THE EDGE OF
THE CONVECTIVE MASS, AND THE LOW-LEVEL CENTER IS DISPLACED TO THE
SOUTHWEST OF THE MID-LEVEL CIRCULATION. SATELLITE ESTIMATES SUPPORT
KEEPING ISELLE A 60-KT TROPICAL STORM FOR THIS ADVISORY. GRADUAL
WEAKENING IS ANTICIPATED DURING THE NEXT FEW DAYS DUE TO PERSISTENT
WESTERLY SHEAR, COOLING WATERS AND A DRY MID-LEVEL ATMOSPHERE.
ISELLE SHOULD LOSE ALL DEEP CONVECTION IN ABOUT 2 DAYS DUE TO A
HOSTILE ENVIRONMENT, AND POST-TROPICAL STATUS IS ANTICIPATED AFTER
THAT TIME. MODEL GUIDANCE IS IN VERY GOOD AGREEMENT ON THE SLOW
DECAY, AND NO SIGNIFICANT CHANGES WERE MADE TO THE LAST NHC
FORECAST.

MICROWAVE FIXES INDICATE THAT ISELLE HAS TURNED, AND IS NOW MOVING
WEST-NORTHWESTWARD AT ABOUT 9 KT. THIS GENERAL HEADING SHOULD
CONTINUE FOR THE NEXT COUPLE OF DAYS DUE TO RIDGING EXTENDING FROM
THE SOUTHERN UNITED STATES. AS THE STORM WEAKENS, IT SHOULD TURN
MORE WESTWARD BY DAY 3 DUE TO THE CYCLONE BECOMING STEERED MORE BY
THE LOW-LEVEL FLOW. THERE HAS BEEN A MODEST LEFTWARD SHIFT IN THE
GUIDANCE, CONSISTENT WITH A WEAKENING SYSTEM, SO THE NEW FORECAST IS
SHIFTED TO THE LEFT, LYING BETWEEN THE NOAA CORRECTED-CONSENSUS
MODEL HCCA AND THE GOOGLE DEEPMIND ENSEMBLE MEAN.


FORECAST POSITIONS AND MAX WINDS

INIT 25/1500Z 20.9N 121.1W 60 KT 70 MPH
12H 26/0000Z 21.4N 122.5W 55 KT 65 MPH
24H 26/1200Z 22.0N 124.1W 45 KT 50 MPH
36H 27/0000Z 22.7N 126.0W 40 KT 45 MPH
48H 27/1200Z 23.3N 127.9W 35 KT 40 MPH
60H 28/0000Z 23.8N 129.8W 30 KT 35 MPH...POST-TROP/REMNT LOW
72H 28/1200Z 24.2N 131.6W 25 KT 30 MPH...POST-TROP/REMNT LOW
96H 29/1200Z...DISSIPATED

$$
FORECASTER BLAKE=


Original Message :

WTPZ34 KNHC 251442
TCPEP4

BULLETIN
Tropical Storm Iselle Advisory Number 9
NWS National Hurricane Center Miami FL EP092026
800 AM PDT Tue Aug 25 2026

...LARGE ISELLE FORECAST TO SLOWLY WEAKEN DURING THE NEXT FEW
DAYS...


SUMMARY OF 800 AM PDT...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...20.9N 121.1W
ABOUT 730 MI...1175 KM W OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...WNW OR 295 DEGREES AT 10 MPH...17 KM/H
MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 800 AM PDT (1500 UTC), the center of Tropical Storm Iselle was
located near latitude 20.9 North, longitude 121.1 West. Iselle is
moving toward the west-northwest near 10 mph (17 km/h), and this
general motion is expected for the next couple of days, with a turn
towards the west possible on Thursday.

Maximum sustained winds remain near 70 mph (110 km/h) with higher
gusts. Slow weakening is forecast during the next few days.

Tropical-storm-force winds extend outward up to 205 miles (335 km)
from the center.

The estimated minimum central pressure is 988 mb (29.18 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle are affecting the west coast of the
Baja California Peninsula, and will continue for a couple more days.
These swells are likely to cause life-threatening surf and rip
current conditions. Please consult products from your local weather
office.


NEXT ADVISORY
-------------
Next complete advisory at 200 PM PDT.

$$
Forecaster Blake


Original Message :

WTPZ24 KNHC 251442
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 9
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
1500 UTC TUE AUG 25 2026

TROPICAL STORM CENTER LOCATED NEAR 20.9N 121.1W AT 25/1500Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 295 DEGREES AT 9 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 988 MB
MAX SUSTAINED WINDS 60 KT WITH GUSTS TO 75 KT.
50 KT....... 80NE 40SE 0SW 50NW.
34 KT.......140NE 180SE 60SW 90NW.
4 M SEAS....240NE 210SE 180SW 180NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 20.9N 121.1W AT 25/1500Z
AT 25/1200Z CENTER WAS LOCATED NEAR 20.8N 120.7W

FORECAST VALID 26/0000Z 21.4N 122.5W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 60NE 30SE 0SW 40NW.
34 KT...140NE 150SE 50SW 90NW.

FORECAST VALID 26/1200Z 22.0N 124.1W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT...120NE 110SE 40SW 90NW.

FORECAST VALID 27/0000Z 22.7N 126.0W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 70NE 50SE 20SW 50NW.

FORECAST VALID 27/1200Z 23.3N 127.9W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 40NE 0SE 0SW 30NW.

FORECAST VALID 28/0000Z 23.8N 129.8W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/1200Z 24.2N 131.6W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 29/1200Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 20.9N 121.1W

NEXT ADVISORY AT 25/2100Z

$$
FORECASTER BLAKE=


Original Message :

WTPN33 PHNC 251000
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 008//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 008
02 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
250600Z --- NEAR 20.4N 119.6W
MOVEMENT PAST SIX HOURS - 300 DEGREES AT 15 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 080 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
050 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
180 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
REPEAT POSIT: 20.4N 119.6W
---
FORECASTS:
12 HRS, VALID AT:
251800Z --- 21.3N 121.4W
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
160 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
100 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 290 DEG/ 09 KTS
---
24 HRS, VALID AT:
260600Z --- 21.9N 123.2W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
020 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT
120 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 295 DEG/ 09 KTS
---
36 HRS, VALID AT:
261800Z --- 22.7N 124.9W
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 290 DEG/ 09 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
270600Z --- 23.4N 126.8W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 60 HR POSIT: 285 DEG/ 09 KTS
---
60 HRS, VALID AT:
271800Z --- 23.9N 128.8W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
VECTOR TO 72 HR POSIT: 285 DEG/ 09 KTS
---
72 HRS, VALID AT:
280600Z --- 24.3N 130.7W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
251000Z POSITION NEAR 20.7N 120.2W.
25AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 750
NM SOUTH OF SAN DIEGO, HAS TRACKED WEST-NORTHWESTWARD AT 15 KNOTS
OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 250600Z IS 988 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 250600Z IS 17 FEET. NEXT WARNINGS AT
251600Z, 252200Z, 260400Z AND 261000Z. REFER TO TROPICAL STORM 10E
(JULIO) WARNINGS (WTPN34 PHNC) FOR SIX-HOURLY UPDATES.//
NNNN


Original Message :

WTPZ34 KNHC 250842
TCPEP4

BULLETIN
Tropical Storm Iselle Advisory Number 8
NWS National Hurricane Center Miami FL EP092026
200 AM PDT Tue Aug 25 2026

...ISELLE MOVING NORTHWESTWARD AS A STRONG TROPICAL STORM...


SUMMARY OF 200 AM PDT...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...20.7N 119.9W
ABOUT 660 MI...1060 KM W OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...NW OR 305 DEGREES AT 15 MPH...24 KM/H
MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 200 AM PDT (0900 UTC), the center of Tropical Storm Iselle was
located near latitude 20.7 North, longitude 119.9 West. Iselle is
moving toward the northwest near 15 mph (24 km/h). A turn toward the
west-northwest and a slower forward speed is expected later today.

Maximum sustained winds are near 70 mph (110 km/h) with higher
gusts. Gradual weakening is expected over the next few days, and
Iselle is forecast to become a post-tropical remnant low by early
Friday.

Tropical-storm-force winds extend outward up to 205 miles (335 km)
from the center.

The estimated minimum central pressure is 988 mb (29.18 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle are affecting the west coast of the
Baja California Peninsula, and will continue for a couple more days.
These swells are likely to cause life-threatening surf and rip
current conditions. Please consult products from your local weather
office.


NEXT ADVISORY
-------------
Next complete advisory at 800 AM PDT.

$$
Forecaster Adams


Original Message :

WTPZ44 KNHC 250843
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 8
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
200 AM PDT TUE AUG 25 2026

THE INFRARED SATELLITE PRESENTATION OF ISELLE REMAINS STEADY EARLY
THIS MORNING, FEATURING AN ESTABLISHED CURVED BAND WITH VERY COLD
CLOUD TOPS OF -75C TO -80C THAT WRAPS ABOUT HALFWAY AROUND THE
STORM. MODERATE WESTERLY WIND SHEAR CONTINUES TO IMPACT THE SYSTEM.
EARLIER MICROWAVE IMAGERY SHOWED AN ESTABLISHED CORE NORTH AND EAST
OF THE CENTER, ALTHOUGH THE WESTERN PORTION OF THE CIRCULATION WAS
LESS DEFINED. AN ASCAT-B PASS FROM EARLIER TONIGHT INDICATED MAXIMUM
WINDS OF 53-56 KT, ALONG WITH SLIGHTLY LARGER 34-KT WIND RADII IN
THE NORTHEAST, SOUTHEAST AND NORTHWEST QUADRANTS. RECENT OBJECTIVE
AND SUBJECTIVE DVORAK INTENSITY ESTIMATES RANGE FROM 51-63 KT. GIVEN
THE STEADY SATELLITE PRESENTATION AND ASCAT DATA, AND AFTER BLENDING
THE SUBJECTIVE AND OBJECTIVE INTENSITY ESTIMATES, THE INITIAL
INTENSITY IS MAINTAINED AT 60 KT FOR THIS ADVISORY. THE ASCAT DATA
ALSO INDICATED THAT ISELLE IS LOCATED FARTHER NORTHWEST AND MOVING
SLIGHTLY FASTER THAN PREVIOUSLY ESTIMATED.

THE TROPICAL STORM IS MOVING NORTHWESTWARD AROUND 13 KT. A TURN
TOWARD THE WEST-NORTHWEST, ACCOMPANIED BY A SLIGHT DECREASE IN
FORWARD SPEED, IS EXPECTED LATER TODAY AS MID-LEVEL RIDGING
CURRENTLY CENTERED OVER THE SOUTHERN UNITED STATES STRENGTHENS AND
EXPANDS WESTWARD INTO THE EASTERN PACIFIC. THIS GENERAL HEADING IS
EXPECTED TO CONTINUE OVER THE NEXT SEVERAL DAYS. THE LATEST NHC
TRACK FORECAST HAS BEEN SHIFTED SLIGHTLY TO THE LEFT AND IS FASTER
THAN THE PREVIOUS ADVISORY TO ACCOUNT FOR THE ADJUSTMENT TO THE
INITIAL POSITION. THE FORECAST REMAINS NEAR THE MIDDLE OF THE TRACK
GUIDANCE ENVELOPE AND IS CLOSEST TO THE GOOGLE DEEPMIND ENSEMBLE
MEAN (GDMI).

ISELLE IS CURRENTLY MOVING OVER WARM WATERS NEAR 28 C AND REMAINS
WITHIN A RELATIVELY MOIST MID-LEVEL ENVIRONMENT, AND HAS LIKELY
REACHED ITS PEAK INTENSITY. AS THE STORM MOVES WEST-NORTHWESTWARD,
PROGRESSIVELY COOLER WATERS, INCREASING DRY MID-LEVEL AIR, CONTINUED
WESTERLY WIND SHEAR AND INCREASINGLY UNFAVORABLE UPPER-LEVEL WINDS
ARE EXPECTED TO CAUSE GRADUAL WEAKENING OVER THE NEXT SEVERAL
DAYS. THE LATEST NHC INTENSITY FORECAST CALLS FOR ISELLE TO WEAKEN
TO A TROPICAL DEPRESSION BY 60 H, AND A POST-TROPICAL REMNANT LOW BY
72 H. HOWEVER, THE ECMWF AND GFS SIMULATED SATELLITE IMAGERY SUGGEST
THAT ISELLE COULD STRUGGLE TO MAINTAIN ORGANIZED DEEP CONVECTION
BEFORE THAT TIME, RAISING THE POSSIBILITY THAT THE CYCLONE COULD
BECOME POST-TROPICAL EARLIER THAN CURRENTLY FORECAST.


FORECAST POSITIONS AND MAX WINDS

INIT 25/0900Z 20.7N 119.9W 60 KT 70 MPH
12H 25/1800Z 21.3N 121.4W 55 KT 65 MPH
24H 26/0600Z 21.9N 123.2W 50 KT 60 MPH
36H 26/1800Z 22.7N 124.9W 45 KT 50 MPH
48H 27/0600Z 23.4N 126.8W 35 KT 40 MPH
60H 27/1800Z 23.9N 128.8W 30 KT 35 MPH
72H 28/0600Z 24.3N 130.7W 25 KT 30 MPH...POST-TROP/REMNT LOW
96H 29/0600Z...DISSIPATED

$$
FORECASTER ADAMS=


Original Message :

WTPZ24 KNHC 250842
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 8
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
0900 UTC TUE AUG 25 2026

TROPICAL STORM CENTER LOCATED NEAR 20.7N 119.9W AT 25/0900Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 305 DEGREES AT 13 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 988 MB
MAX SUSTAINED WINDS 60 KT WITH GUSTS TO 75 KT.
50 KT....... 80NE 40SE 0SW 50NW.
34 KT.......140NE 180SE 60SW 90NW.
4 M SEAS....210NE 210SE 105SW 180NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 20.7N 119.9W AT 25/0900Z
AT 25/0600Z CENTER WAS LOCATED NEAR 20.4N 119.6W

FORECAST VALID 25/1800Z 21.3N 121.4W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 60NE 30SE 0SW 40NW.
34 KT...140NE 160SE 50SW 100NW.

FORECAST VALID 26/0600Z 21.9N 123.2W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 30NE 0SE 0SW 20NW.
34 KT...130NE 120SE 40SW 90NW.

FORECAST VALID 26/1800Z 22.7N 124.9W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 90NE 60SE 30SW 70NW.

FORECAST VALID 27/0600Z 23.4N 126.8W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 50NE 0SE 0SW 40NW.

FORECAST VALID 27/1800Z 23.9N 128.8W
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/0600Z 24.3N 130.7W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 29/0600Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 20.7N 119.9W

NEXT ADVISORY AT 25/1500Z

$$
FORECASTER ADAMS=


Original Message :

WTPN33 PHNC 250400
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 007//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 007
02 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
250000Z --- NEAR 19.6N 118.2W
MOVEMENT PAST SIX HOURS - 320 DEGREES AT 09 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT
170 NM SOUTHEAST QUADRANT
110 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
REPEAT POSIT: 19.6N 118.2W
---
FORECASTS:
12 HRS, VALID AT:
251200Z --- 20.7N 119.9W
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 050 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
190 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 290 DEG/ 09 KTS
---
24 HRS, VALID AT:
260000Z --- 21.3N 121.7W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 020 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
010 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
180 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 285 DEG/ 10 KTS
---
36 HRS, VALID AT:
261200Z --- 21.8N 123.7W
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 090 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 300 DEG/ 08 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
270000Z --- 22.6N 125.1W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
050 NM NORTHWEST QUADRANT
VECTOR TO 60 HR POSIT: 290 DEG/ 09 KTS
---
60 HRS, VALID AT:
271200Z --- 23.2N 127.0W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 72 HR POSIT: 280 DEG/ 10 KTS
---
72 HRS, VALID AT:
280000Z --- 23.6N 129.1W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
---
REMARKS:
250400Z POSITION NEAR 20.0N 118.8W.
25AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 788
NM SOUTH OF SAN DIEGO, HAS TRACKED NORTHWESTWARD AT 09 KNOTS OVER
THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 250000Z IS 988 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 250000Z IS 16 FEET. NEXT WARNINGS AT
251000Z, 251600Z, 252200Z AND 260400Z.
REFER TO TROPICAL CYCLONE 10E (TEN) WARNINGS (WTPN34 PHNC)
FOR SIX-HOURLY UPDATES.
//
NNNN


Original Message :

WTPZ34 KNHC 250236
TCPEP4

BULLETIN
Tropical Storm Iselle Advisory Number 7
NWS National Hurricane Center Miami FL EP092026
800 PM PDT Mon Aug 24 2026

...ISELLE REMAINS JUST BELOW HURRICANE STRENGTH...


SUMMARY OF 800 PM PDT...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...20.1N 118.6W
ABOUT 590 MI...950 KM WSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...NW OR 325 DEGREES AT 15 MPH...24 KM/H
MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 800 PM PDT (0300 UTC), the center of Tropical Storm Iselle was
located near latitude 20.1 North, longitude 118.6 West. Iselle is
moving toward the northwest near 15 mph (24 km/h), and this motion
is expected to continue through tonight, followed by a turn toward
the west-northwest on Tuesday.

Maximum sustained winds remain near 70 mph (110 km/h) with higher
gusts. A short amount of time remains for additional strengthening,
and Iselle could briefly become a hurricane. Gradual weakening is
then forecast starting later on Tuesday.

Tropical-storm-force winds extend outward up to 195 miles (315 km)
from the center.

The estimated minimum central pressure is 988 mb (29.18 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle are affecting the west coast of the
Baja California Peninsula, and will continue for a couple more days.
These swells are likely to cause life-threatening surf and rip
current conditions. Please consult products from your local weather
office.


NEXT ADVISORY
-------------
Next complete advisory at 200 AM PDT.

$$
Forecaster Katz/Cangialosi


Original Message :

WTPZ44 KNHC 250237
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 7
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 PM PDT MON AUG 24 2026

BASED ON THE MOST RECENT SATELLITE IMAGERY, IT APPEARS THAT THE
MODERATE WEST-NORTHWESTERLY SHEAR COULD BE STARTING TO IMPACT
ISELLE, AS THE BULK OF THE CONVECTION IS BEING PUSHED AWAY FROM THE
CENTER. THE CYCLONE STILL HAS A TRAINING CURVED BAND THAT EXTENDS
PRETTY FAR SOUTH ON THE EAST SIDE. THE MOST RECENT SUBJECTIVE DVORAK
CLASSIFICATION FROM TAFB IS T3.5/55 KT, AND THE OBJECTIVE SATELLITE
INTENSITY ESTIMATES RANGE FROM 50 TO 67 KT. BASED ON THE GIVEN DATA,
THE INITIAL INTENSITY IS BEING KEPT AT 60 KT FOR THIS ADVISORY.

THE INITIAL MOTION ESTIMATE IS UNCHANGED FROM THE PREVIOUS ADVISORY,
NORTHWESTWARD, OR 315/10 KT. A MID-LEVEL RIDGE NORTH OF ISELLE IS
FORECAST TO STRENGTHEN, CAUSING ISELLE TO TURN WEST-NORTHWESTWARD ON
TUESDAY, AND THAT MOTION SHOULD THEN CONTINUE THROUGH THE END OF THE
WEEK. THE LATEST NHC TRACK FORECAST IS QUITE SIMILAR TO THE
PREVIOUS ONE, AND LIES VERY CLOSE TO THE HFIP CORRECTED CONSENSUS
(HCCA) AND THE GOOGLE DEEPMIND ENSEMBLE MEAN (GDMI).

THE STORM IS STILL OVER WARM WATERS AND WITHIN A MOIST ENVIRONMENT,
BUT WITH MODERATE WEST-NORTHWESTERLY VERTICAL WIND SHEAR, THERE IS
LIKELY A LIMIT TO HOW MUCH STRENGTH ISELLE COULD GAIN. IT IS STILL
POSSIBLE THAT ISELLE COULD GET TO HURRICANE INTENSITY, HOWEVER, THE
TIME TO DO SO IS LIMITED. AFTER THE NEXT 12 H, THE ENVIRONMENT IS
EXPECTED TO BECOME MORE HOSTILE AS THE WIND SHEAR, DRY AIR, AND
COOLER SEA-SURFACE TEMPERATURES WILL HAVE A NEGATIVE IMPACT ON THE
CYCLONE'S INTENSITY. THE SIMULATED ECMWF AND GFS SATELLITE IMAGERY
SUGGEST THAT ISELLE COULD BECOME A A REMNANT LOW AS EARLY AS
WEDNESDAY NIGHT AND THEN COULD BE DISSIPATE AROUND DAY 4. IT IS
POSSIBLE THAT THIS SYSTEM COULD DISSIPATE EVEN SOONER THAN WHAT IS
CURRENTLY FORECASTED.

FORECAST POSITIONS AND MAX WINDS

INIT 25/0300Z 20.1N 118.6W 60 KT 70 MPH
12H 25/1200Z 20.7N 119.9W 55 KT 65 MPH
24H 26/0000Z 21.3N 121.7W 50 KT 60 MPH
36H 26/1200Z 21.8N 123.7W 45 KT 50 MPH
48H 27/0000Z 22.6N 125.1W 35 KT 40 MPH
60H 27/1200Z 23.2N 127.0W 30 KT 35 MPH
72H 28/0000Z 23.6N 129.1W 25 KT 30 MPH...POST-TROP/REMNT LOW
96H 29/0000Z...DISSIPATED

$$
FORECASTER KATZ/CANGIALOSI=


Original Message :

WTPZ24 KNHC 250235
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 7
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
0300 UTC TUE AUG 25 2026

TROPICAL STORM CENTER LOCATED NEAR 20.1N 118.6W AT 25/0300Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 325 DEGREES AT 13 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 988 MB
MAX SUSTAINED WINDS 60 KT WITH GUSTS TO 75 KT.
50 KT....... 60NE 60SE 0SW 0NW.
34 KT.......130NE 170SE 110SW 60NW.
4 M SEAS....210NE 180SE 90SW 150NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 20.1N 118.6W AT 25/0300Z
AT 25/0000Z CENTER WAS LOCATED NEAR 19.6N 118.2W

FORECAST VALID 25/1200Z 20.7N 119.9W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 50NE 50SE 0SW 30NW.
34 KT...140NE 190SE 90SW 80NW.

FORECAST VALID 26/0000Z 21.3N 121.7W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 20NE 0SE 0SW 10NW.
34 KT...140NE 180SE 80SW 80NW.

FORECAST VALID 26/1200Z 21.8N 123.7W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 90NE 40SE 40SW 60NW.

FORECAST VALID 27/0000Z 22.6N 125.1W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 50NE 0SE 0SW 50NW.

FORECAST VALID 27/1200Z 23.2N 127.0W
MAX WIND 30 KT...GUSTS 40 KT.

FORECAST VALID 28/0000Z 23.6N 129.1W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 29/0000Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 20.1N 118.6W

NEXT ADVISORY AT 25/0900Z

$$
FORECASTER KATZ/CANGIALOSI=


Original Message :

WTPN33 PHNC 242200
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 006//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 006
02 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
241800Z --- NEAR 18.9N 117.6W
MOVEMENT PAST SIX HOURS - 310 DEGREES AT 11 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT
170 NM SOUTHEAST QUADRANT
110 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
REPEAT POSIT: 18.9N 117.6W
---
FORECASTS:
12 HRS, VALID AT:
250600Z --- 20.1N 119.4W
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 020 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
190 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 295 DEG/ 10 KTS
---
24 HRS, VALID AT:
251800Z --- 20.9N 121.3W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 050 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
180 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 285 DEG/ 09 KTS
---
36 HRS, VALID AT:
260600Z --- 21.4N 123.2W
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
120 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 290 DEG/ 08 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
261800Z --- 21.9N 124.9W
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 60 HR POSIT: 285 DEG/ 09 KTS
---
60 HRS, VALID AT:
270600Z --- 22.4N 126.8W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 050 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 285 DEG/ 10 KTS
---
72 HRS, VALID AT:
271800Z --- 22.9N 128.9W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
VECTOR TO 96 HR POSIT: 280 DEG/ 10 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
281800Z --- 23.5N 133.3W
MAX SUSTAINED WINDS - 025 KT, GUSTS 035 KT
WIND RADII VALID OVER OPEN WATER ONLY
---
REMARKS:
242200Z POSITION NEAR 19.3N 118.2W.
24AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 828
NM SOUTH OF SAN DIEGO, HAS TRACKED NORTHWESTWARD AT 11 KNOTS OVER
THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 241800Z IS 988 MB. MAXIMUM
SIGNIFICANT WAVE HEIGHT AT 241800Z IS 16 FEET. NEXT WARNINGS AT
250400Z, 251000Z, 251600Z AND 252200Z.
REFER TO TROPICAL DEPRESSION 10E (TEN) WARNINGS (WTPN34 PHNC)
FOR SIX-HOURLY UPDATES.
//
NNNN


Original Message :

WTPZ34 KNHC 242031
TCPEP4

BULLETIN
Tropical Storm Iselle Advisory Number 6
NWS National Hurricane Center Miami FL EP092026
200 PM PDT Mon Aug 24 2026

...ISELLE NEAR HURRICANE STRENGTH...


SUMMARY OF 200 PM PDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...19.2N 118.0W
ABOUT 580 MI...935 KM WSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...70 MPH...110 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...988 MB...29.18 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 200 PM PDT (2100 UTC), the center of Tropical Storm Iselle was
located near latitude 19.2 North, longitude 118.0 West. Iselle is
moving toward the northwest near 13 mph (20 km/h), and this motion
is expected to continue through tonight, followed by a turn toward
the west-northwest on Tuesday.

Maximum sustained winds have increased to near 70 mph (110 km/h)
with higher gusts. Additional strengthening is likely through this
evening, and Iselle could becoming a hurricane during that time.
Gradual weakening is then forecast starting later on Tuesday.

Tropical-storm-force winds extend outward up to 195 miles (315 km)
from the center.

The estimated minimum central pressure is 988 mb (29.18 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle are affecting the west coast of the
Baja California Peninsula, and will continue for a couple more days.
These swells are likely to cause life-threatening surf and rip
current conditions. Please consult products from your local weather
office.


NEXT ADVISORY
-------------
Next complete advisory at 800 PM PDT.

$$
Forecaster Hagen


Original Message :

WTPZ44 KNHC 242032
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 6
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
200 PM PDT MON AUG 24 2026

ISELLE'S CLOUD PATTERN CONTINUES TO GRADUALLY IMPROVE IN
GEOSTATIONARY SATELLITE IMAGERY DESPITE THE MODERATE
WEST-NORTHWESTERLY SHEAR IN THE ENVIRONMENT. THE CYCLONE CONTAINS A
CORE OF DEEP CONVECTION WITH AN IMPRESSIVE TRAILING CURVED BAND
EXTENDING SOUTHWARD ON THE EAST SIDE OF ISELLE. SOME RECENT
MICROWAVE SATELLITE OVERPASSES SHOW A SIMILAR STRUCTURE. THE LATEST
SUBJECTIVE DVORAK CLASSIFICATION FROM TAFB IS T3.5/55 KT, AND
OBJECTIVE SATELLITE INTENSITY ESTIMATES RANGE FROM 55 TO 59 KT.
BASED ON THE IMPROVING STRUCTURE, THE INITIAL INTENSITY IS INCREASED
TO 60 KT FOR THIS ADVISORY.

THE INITIAL MOTION ESTIMATE IS UNCHANGED FROM THE PREVIOUS ADVISORY,
NORTHWESTWARD, OR 310/11 KT. A MID-LEVEL RIDGE NORTH OF ISELLE IS
FORECAST TO STRENGTHEN, CAUSING ISELLE TO TURN WEST-NORTHWESTWARD ON
TUESDAY, AND THAT MOTION SHOULD THEN CONTINUE THROUGH THE END OF THE
WEEK. THE LATEST NHC TRACK FORECAST IS QUITE SIMILAR TO THE
PREVIOUS ONE, AND LIES VERY CLOSE TO THE HFIP CORRECTED CONSENSUS
(HCCA) AND THE GOOGLE DEEPMIND ENSEMBLE MEAN (GDMI).

ISELLE REMAINS OVER WARM WATERS AND WITHIN A MOIST ENVIRONMENT.
HOWEVER, THE CYCLONE IS EXPERIENCING MODERATE WEST-NORTHWESTERLY
VERTICAL WIND SHEAR. WATER TEMPERATURES AND MOISTURE WILL REMAIN
QUITE FAVORABLE FOR ANOTHER 12 TO 24 H, BUT THE SHEAR IS FORECAST TO
INCREASE SLIGHTLY TO ABOUT 20 KT IN ABOUT 12 H. GIVEN THE RECENTLY
IMPROVING STRUCTURE, THE NHC FORECAST CONTINUES TO CALL FOR THE
SYSTEM TO STRENGTHEN TO A HURRICANE IN 12 H. THE NHC INTENSITY
FORECAST IS NEAR THE HIGH END OF THE GUIDANCE SUITE FOR THE FIRST 36
H OF THE FORECAST. BEYOND 24 H, GRADUALLY DECREASING OCEAN
TEMPERATURES AND MOISTURE WILL LEAD TO STEADY WEAKENING, AND THE NHC
INTENSITY FORECAST LIES IN THE MIDDLE OF THE GUIDANCE ENVELOPE FROM
HOUR 48 ONWARD. THE LATEST ECMWF AND GFS SIMULATED SATELLITE IMAGERY
SUGGEST THAT ISELLE COULD BECOME A REMNANT LOW AS EARLY AS THURSDAY.
THE TIME OF WHEN ISELLE BECOMES A POST-TROPICAL CYCLONE HAS BEEN
MOVED FORWARD TO 72 HOURS. AFTER THAT, THE MODELS INDICATE THE
REMNANT LOW OPENING UP INTO A TROUGH BETWEEN DAY 4 AND 5.


FORECAST POSITIONS AND MAX WINDS

INIT 24/2100Z 19.2N 118.0W 60 KT 70 MPH
12H 25/0600Z 20.1N 119.4W 65 KT 75 MPH
24H 25/1800Z 20.9N 121.3W 60 KT 70 MPH
36H 26/0600Z 21.4N 123.2W 55 KT 65 MPH
48H 26/1800Z 21.9N 124.9W 45 KT 50 MPH
60H 27/0600Z 22.4N 126.8W 35 KT 40 MPH
72H 27/1800Z 22.9N 128.9W 30 KT 35 MPH...POST-TROP/REMNT LOW
96H 28/1800Z 23.5N 133.3W 25 KT 30 MPH...POST-TROP/REMNT LOW
120H 29/1800Z...DISSIPATED

$$
FORECASTER HAGEN=


Original Message :

WTPZ24 KNHC 242030
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 6
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
2100 UTC MON AUG 24 2026

TROPICAL STORM CENTER LOCATED NEAR 19.2N 118.0W AT 24/2100Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 310 DEGREES AT 11 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 988 MB
MAX SUSTAINED WINDS 60 KT WITH GUSTS TO 75 KT.
50 KT....... 60NE 60SE 0SW 0NW.
34 KT.......130NE 170SE 110SW 60NW.
4 M SEAS....210NE 180SE 90SW 150NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 19.2N 118.0W AT 24/2100Z
AT 24/1800Z CENTER WAS LOCATED NEAR 18.9N 117.6W

FORECAST VALID 25/0600Z 20.1N 119.4W
MAX WIND 65 KT...GUSTS 80 KT.
64 KT... 20NE 0SE 0SW 0NW.
50 KT... 60NE 50SE 0SW 30NW.
34 KT...140NE 190SE 90SW 70NW.

FORECAST VALID 25/1800Z 20.9N 121.3W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 50NE 30SE 0SW 30NW.
34 KT...140NE 180SE 80SW 80NW.

FORECAST VALID 26/0600Z 21.4N 123.2W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 40NE 30SE 0SW 0NW.
34 KT...120NE 120SE 60SW 70NW.

FORECAST VALID 26/1800Z 21.9N 124.9W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 80NE 60SE 40SW 60NW.

FORECAST VALID 27/0600Z 22.4N 126.8W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 50NE 0SE 0SW 40NW.

FORECAST VALID 27/1800Z 22.9N 128.9W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 28/1800Z 23.5N 133.3W...POST-TROP/REMNT LOW
MAX WIND 25 KT...GUSTS 35 KT.

OUTLOOK VALID 29/1800Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 19.2N 118.0W

NEXT ADVISORY AT 25/0300Z

$$
FORECASTER HAGEN=


Original Message :

WTPN33 PHNC 241600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 005//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 005
01 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
241200Z --- NEAR 18.2N 116.7W
MOVEMENT PAST SIX HOURS - 305 DEGREES AT 10 KTS
POSITION ACCURATE TO WITHIN 030 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 050 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
110 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
REPEAT POSIT: 18.2N 116.7W
---
FORECASTS:
12 HRS, VALID AT:
250000Z --- 19.4N 118.3W
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 020 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
020 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT
120 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 300 DEG/ 10 KTS
---
24 HRS, VALID AT:
251200Z --- 20.5N 120.2W
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 020 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 060 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
130 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 290 DEG/ 09 KTS
---
36 HRS, VALID AT:
260000Z --- 21.1N 122.1W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 050 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 140 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
070 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 285 DEG/ 08 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
261200Z --- 21.5N 123.8W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT
070 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 60 HR POSIT: 285 DEG/ 09 KTS
---
60 HRS, VALID AT:
270000Z --- 22.0N 125.6W
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 070 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 285 DEG/ 10 KTS
---
72 HRS, VALID AT:
271200Z --- 22.5N 127.6W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
RADIUS OF 034 KT WINDS - 040 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 280 DEG/ 10 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
281200Z --- 23.1N 131.9W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
241600Z POSITION NEAR 18.6N 117.2W. 24AUG26. TROPICAL STORM 09E
(ISELLE), LOCATED APPROXIMATELY 870 NM SOUTH OF SAN DIEGO, HAS TRACKED
NORTHWESTWARD AT 10 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL
PRESSURE AT 241200Z IS 992 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT
241200Z IS 15 FEET. NEXT WARNINGS AT 242200Z, 250400Z, 251000Z AND
251600Z.//
NNNN


Original Message :

WTPZ34 KNHC 241433
TCPEP4

BULLETIN
TROPICAL STORM ISELLE ADVISORY NUMBER 5
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 AM PDT MON AUG 24 2026

...ISELLE CONTINUES TO STRENGTHEN...


SUMMARY OF 800 AM PDT...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...18.5N 117.1W
ABOUT 555 MI...895 KM WSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...65 MPH...100 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 13 MPH...20 KM/H
MINIMUM CENTRAL PRESSURE...992 MB...29.30 INCHES


WATCHES AND WARNINGS
--------------------
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.


DISCUSSION AND OUTLOOK
----------------------
AT 800 AM PDT (1500 UTC), THE CENTER OF TROPICAL STORM ISELLE WAS
LOCATED NEAR LATITUDE 18.5 NORTH, LONGITUDE 117.1 WEST. ISELLE IS
MOVING TOWARD THE NORTHWEST NEAR 13 MPH (20 KM/H) AND THIS MOTION IS
EXPECTED TO CONTINUE THROUGH TONIGHT, FOLLOWED BY A TURN TOWARD THE
WEST-NORTHWEST ON TUESDAY.

MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR 65 MPH (100 KM/H)
WITH HIGHER GUSTS. SOME STRENGTHENING IS EXPECTED OVER THE NEXT 12
TO 24 HOURS, AND ISELLE COULD BECOME A HURRICANE BY TONIGHT. GRADUAL
WEAKENING IS THEN FORECAST STARTING LATER ON TUESDAY.

TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 140 MILES (220 KM)
FROM THE CENTER.

THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 992 MB (29.30 INCHES).


HAZARDS AFFECTING LAND
----------------------
SURF: SWELLS GENERATED BY ISELLE ARE AFFECTING THE WEST COAST OF THE
BAJA CALIFORNIA PENINSULA, AND WILL CONTINUE FOR A COUPLE MORE DAYS.
THESE SWELLS ARE LIKELY TO CAUSE LIFE-THREATENING SURF AND RIP
CURRENT CONDITIONS. PLEASE CONSULT PRODUCTS FROM YOUR LOCAL WEATHER
OFFICE.


NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY AT 200 PM PDT.

$$
FORECASTER HAGEN=


Original Message :

WTPZ44 KNHC 241433
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 5
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 AM PDT MON AUG 24 2026

DESPITE BEING AFFECTED BY MODERATE WEST-NORTHWESTERLY SHEAR,
ISELLE'S CLOUD PATTERN HAS CONTINUED TO IMPROVE, WITH A CORE OF VERY
DEEP CONVECTION THAT HAS NOW ROTATED OVER AND NORTH OF THE CENTER,
AND A DEEP CONVECTIVE BAND EXTENDING SOUTHWARD ON THE EAST SIDE OF
THE CYCLONE. A 24/0903 UTC AMSR-2 PASS ALSO SHOWS THE IMPROVING
STRUCTURE OF THE INNER CORE. THE LATEST SUBJECTIVE DVORAK
CLASSIFICATION FROM TAFB IS T3.5/55 KT, AND OBJECTIVE SATELLITE
INTENSITY ESTIMATES RANGE FROM 50 TO 59 KT. THE INITIAL INTENSITY
HAS BEEN SET AT 55 KT FOR THIS ADVISORY, IN AGREEMENT WITH THE
ESTIMATES.

THE INITIAL MOTION ESTIMATE IS NORTHWESTWARD, OR 310/11 KT. A
MID-LEVEL RIDGE NORTH OF ISELLE IS FORECAST TO STRENGTHEN, CAUSING
ISELLE TO TURN WEST-NORTHWESTWARD ON TUESDAY, AND THAT MOTION SHOULD
THEN CONTINUE THROUGH THE END OF THE WEEK. THE LATEST NHC TRACK
FORECAST IS A LITTLE FASTER AND TO THE LEFT OF THE PREVIOUS
FORECAST, AND LIES VERY CLOSE TO THE HFIP CORRECTED CONSENSUS (HCCA)
AND THE GOOGLE DEEPMIND ENSEMBLE MEAN (GDMI).

ISELLE REMAINS OVER WARM WATERS AND WITHIN A MOIST ENVIRONMENT.
HOWEVER, SHIPS AND UW-CIMSS BOTH CURRENTLY ANALYZE 17 KT OF VERTICAL
WIND SHEAR. WATER TEMPERATURES AND MOISTURE WILL REMAIN QUITE
FAVORABLE FOR ANOTHER 24 H, BUT THE SHEAR IS FORECAST TO INCREASE TO
AT LEAST 20 KT BETWEEN THE 12 TO 24 H PERIOD. GIVEN THE RECENTLY
IMPROVING STRUCTURE, THE NHC FORECAST CONTINUES TO CALL FOR
STRENGTHENING AND SYSTEM TO BECOME A HURRICANE IN 12 TO 24 H, WHICH
IS AT THE HIGH END OF THE INTENSITY MODEL GUIDANCE SUITE. HOWEVER,
GIVEN THE INCREASING SHEAR, THERE IS SOME UNCERTAINTY AS TO WHETHER
ISELLE WILL BECOME A HURRICANE. BEYOND 24 H, GRADUALLY DECREASING
OCEAN TEMPERATURES AND MOISTURE WILL LEAD TO STEADY WEAKENING, AND
THE NHC INTENSITY FORECAST LIES IN THE MIDDLE OF THE GUIDANCE
ENVELOPE FROM HOUR 48 ONWARD. THE LATEST ECMWF AND GFS SIMULATED
SATELLITE IMAGERY SUGGEST THAT ISELLE COULD BECOME A REMNANT LOW AS
EARLY AS THURSDAY. I HAVE MOVED FORWARD THE FORECAST TIME FOR
ISELLE BECOMING POST-TROPICAL TO HOUR 96, BUT IT'S POSSIBLE THE
CYCLONE COULD LOSE ITS CONVECTION SOONER THAN FORECAST. AFTER THAT,
THE MODELS INDICATE THE REMNANT LOW OPENING UP INTO A TROUGH BY DAY
5.


FORECAST POSITIONS AND MAX WINDS

INIT 24/1500Z 18.5N 117.1W 55 KT 65 MPH
12H 25/0000Z 19.4N 118.3W 65 KT 75 MPH
24H 25/1200Z 20.5N 120.2W 65 KT 75 MPH
36H 26/0000Z 21.1N 122.1W 60 KT 70 MPH
48H 26/1200Z 21.5N 123.8W 50 KT 60 MPH
60H 27/0000Z 22.0N 125.6W 40 KT 45 MPH
72H 27/1200Z 22.5N 127.6W 35 KT 40 MPH
96H 28/1200Z 23.1N 131.9W 30 KT 35 MPH...POST-TROP/REMNT LOW
120H 29/1200Z...DISSIPATED

$$
FORECASTER HAGEN=


Original Message :

WTPZ24 KNHC 241432
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 5
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
1500 UTC MON AUG 24 2026

TROPICAL STORM CENTER LOCATED NEAR 18.5N 117.1W AT 24/1500Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 310 DEGREES AT 11 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 992 MB
MAX SUSTAINED WINDS 55 KT WITH GUSTS TO 65 KT.
50 KT....... 50NE 50SE 0SW 0NW.
34 KT.......120NE 100SE 110SW 60NW.
4 M SEAS....210NE 150SE 90SW 150NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 18.5N 117.1W AT 24/1500Z
AT 24/1200Z CENTER WAS LOCATED NEAR 18.2N 116.7W

FORECAST VALID 25/0000Z 19.4N 118.3W
MAX WIND 65 KT...GUSTS 80 KT.
64 KT... 20NE 0SE 0SW 0NW.
50 KT... 60NE 50SE 0SW 20NW.
34 KT...130NE 120SE 90SW 70NW.

FORECAST VALID 25/1200Z 20.5N 120.2W
MAX WIND 65 KT...GUSTS 80 KT.
64 KT... 20NE 0SE 0SW 0NW.
50 KT... 60NE 40SE 0SW 30NW.
34 KT...140NE 130SE 90SW 80NW.

FORECAST VALID 26/0000Z 21.1N 122.1W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 50NE 40SE 0SW 30NW.
34 KT...140NE 100SE 70SW 90NW.

FORECAST VALID 26/1200Z 21.5N 123.8W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 40NE 0SE 0SW 0NW.
34 KT...110NE 70SE 60SW 80NW.

FORECAST VALID 27/0000Z 22.0N 125.6W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 70NE 40SE 40SW 60NW.

FORECAST VALID 27/1200Z 22.5N 127.6W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 40NE 0SE 0SW 40NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 28/1200Z 23.1N 131.9W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

OUTLOOK VALID 29/1200Z...DISSIPATED

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 18.5N 117.1W

NEXT ADVISORY AT 24/2100Z

$$
FORECASTER HAGEN=


Original Message :

WTPN33 PHNC 241000
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 004//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 004
01 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
240600Z --- NEAR 17.6N 115.8W
MOVEMENT PAST SIX HOURS - 315 DEGREES AT 12 KTS
POSITION ACCURATE TO WITHIN 040 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
110 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
REPEAT POSIT: 17.6N 115.8W
---
FORECASTS:
12 HRS, VALID AT:
241800Z --- 19.0N 117.4W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 050 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
020 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 310 DEG/ 09 KTS
---
24 HRS, VALID AT:
250600Z --- 20.1N 118.9W
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 020 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 050 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT
110 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 295 DEG/ 09 KTS
---
36 HRS, VALID AT:
251800Z --- 20.9N 120.7W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 050 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
100 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 290 DEG/ 09 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
260600Z --- 21.5N 122.5W
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
100 NM NORTHWEST QUADRANT
VECTOR TO 60 HR POSIT: 285 DEG/ 09 KTS
---
60 HRS, VALID AT:
261800Z --- 21.9N 124.4W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 285 DEG/ 09 KTS
---
72 HRS, VALID AT:
270600Z --- 22.4N 126.3W
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 280 DEG/ 09 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
280600Z --- 23.1N 130.1W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 120 HR POSIT: 285 DEG/ 09 KTS
---
120 HRS, VALID AT:
290600Z --- 23.9N 134.1W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
---
REMARKS:
241000Z POSITION NEAR 18.1N 116.3W. 24AUG26. TROPICAL STORM 09E
(ISELLE), LOCATED APPROXIMATELY 909 NM SOUTH OF SAN DIEGO, HAS TRACKED
NORTHWESTWARD AT 12 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL
PRESSURE AT 240600Z IS 996 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT
240600Z IS 20 FEET. NEXT WARNINGS AT 241600Z, 242200Z, 250400Z AND
251000Z.//
NNNN


Original Message :

WTPZ34 KNHC 240850
TCPEP4

BULLETIN
TROPICAL STORM ISELLE ADVISORY NUMBER 4
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
200 AM PDT MON AUG 24 2026

...ISELLE STRENGTHENS SLIGHTLY...


SUMMARY OF 200 AM PDT...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...17.8N 116.2W
ABOUT 540 MI...865 KM SW OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...60 MPH...95 KM/H
PRESENT MOVEMENT...NW OR 315 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...996 MB...29.42 INCHES


WATCHES AND WARNINGS
--------------------
THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.


DISCUSSION AND OUTLOOK
----------------------
AT 200 AM PDT (0900 UTC), THE CENTER OF TROPICAL STORM ISELLE WAS
LOCATED NEAR LATITUDE 17.8 NORTH, LONGITUDE 116.2 WEST. ISELLE IS
MOVING TOWARD THE NORTHWEST NEAR 12 MPH (19 KM/H) AND THIS MOTION IS
EXPECTED TO CONTINUE THROUGH TONIGHT, FOLLOWED BY A GRADUAL TURN
TOWARD THE WEST-NORTHWEST ON TUESDAY.

MAXIMUM SUSTAINED WINDS HAVE INCREASED TO NEAR 60 MPH (95 KM/H) WITH
HIGHER GUSTS. SOME STRENGTHENING IS EXPECTED OVER THE NEXT DAY OR
SO, AND ISELLE COULD BECOME A SHORT-LIVED HURRICANE BY LATE TONIGHT.
GRADUAL WEAKENING IS THEN FORECAST STARTING ON TUESDAY.

TROPICAL-STORM-FORCE WINDS EXTEND OUTWARD UP TO 125 MILES (205 KM)
FROM THE CENTER.

THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 996 MB (29.42 INCHES).


HAZARDS AFFECTING LAND
----------------------
SURF: SWELLS GENERATED BY ISELLE WILL AFFECT THE WEST COAST OF THE
BAJA CALIFORNIA PENINSULA BEGINNING TODAY. THESE SWELLS ARE LIKELY
TO CAUSE LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. PLEASE
CONSULT PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.


NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY AT 800 AM PDT.

$$
FORECASTER ADAMS=


Original Message :

WTPZ44 KNHC 240851
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 4
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
200 AM PDT MON AUG 24 2026

ISELLE IS BEING AFFECTED BY NORTHWESTERLY SHEAR, WITH MUCH OF THE
DEEP CONVECTION DISPLACED TO THE SOUTH AND EAST OF THE CENTER. OVER
THE PAST SEVERAL HOURS, THE CONVECTIVE STRUCTURE HAS EVOLVED, WITH
CURVED BANDING BECOMING INCREASINGLY ESTABLISHED AROUND THE CENTER.
THE LATEST DVORAK INTENSITY ESTIMATE FROM TAFB AT 0600 UTC WAS
3.0/45 KT; HOWEVER, RECENT OBJECTIVE INTENSITY ESTIMATES FROM
UW-CIMSS HAVE INCREASED AND RANGE FROM 43-59 KT. GIVEN THE IMPROVED
BANDING EVIDENT ON SATELLITE IMAGERY AND THE UPWARD TREND IN
OBJECTIVE INTENSITY ESTIMATES, THE INITIAL INTENSITY IS SET AT 50 KT
FOR THIS ADVISORY.

THE TROPICAL STORM IS MOVING NORTHWESTWARD AROUND 10 KT, STEERED BY
A MID-LEVEL RIDGE CENTERED OVER THE SOUTHWESTERN UNITED STATES.
ISELLE IS FORECAST TO TURN TOWARD THE WEST-NORTHWEST AS THE RIDGE
EXPANDS WESTWARD INTO THE EASTERN PACIFIC, AND THIS GENERAL MOTION
IS EXPECTED THROUGH MUCH OF THIS WEEK. THE LATEST NHC FORECAST IS
VERY SIMILAR TO THE PREVIOUS ADVISORY AND LIES NEAR THE MIDDLE OF
THE TRACK GUIDANCE ENVELOPE, CLOSEST TO THE HFIP CORRECTED CONSENSUS
(HCCA) AND THE GOOGLE DEEPMIND (GDMI) MODEL. THERE IS CONSIDERABLE
SPREAD AMONG THE GUIDANCE DURING THE LATTER PORTION OF THE FORECAST
PERIOD, RESULTING IN SLIGHTLY BELOW-AVERAGE CONFIDENCE IN THE TRACK
FORECAST.

ISELLE IS MOVING OVER WARM WATERS AROUND 29-30 C AND REMAINS WITHIN
A FAIRLY MOIST MID-LEVEL ENVIRONMENT, WHICH SHOULD SUPPORT GRADUAL
STRENGTHENING DURING THE NEXT 12-24 H. THE LATEST NHC FORECAST
BRINGS ISELLE TO HURRICANE STRENGTH DURING THIS PERIOD, NEAR THE
UPPER END OF THE INTENSITY GUIDANCE, AND IS CONSISTENT WITH HCCA AND
GDM. BEYOND 24 H, INCREASING WIND SHEAR, COOLER WATERS AND
PROGRESSIVELY DRIER MID-LEVEL AIR ARE EXPECTED TO LEAD TO GRADUAL
WEAKENING FROM TUESDAY THROUGH THE REMAINDER OF THE WEEK. THE ECMWF
AND GFS SIMULATED SATELLITE IMAGERY SUGGEST THAT ISELLE MAY STRUGGLE
TO MAINTAIN ORGANIZED CONVECTION BY LATE THIS WEEK, RAISING THE
POSSIBILITY THAT THE CYCLONE COULD BECOME POST-TROPICAL EARLIER THAN
CURRENTLY FORECAST.


FORECAST POSITIONS AND MAX WINDS

INIT 24/0900Z 17.8N 116.2W 50 KT 60 MPH
12H 24/1800Z 19.0N 117.4W 60 KT 70 MPH
24H 25/0600Z 20.1N 118.9W 65 KT 75 MPH
36H 25/1800Z 20.9N 120.7W 60 KT 70 MPH
48H 26/0600Z 21.5N 122.5W 55 KT 65 MPH
60H 26/1800Z 21.9N 124.4W 50 KT 60 MPH
72H 27/0600Z 22.4N 126.3W 45 KT 50 MPH
96H 28/0600Z 23.1N 130.1W 35 KT 40 MPH
120H 29/0600Z 23.9N 134.1W 30 KT 35 MPH...POST-TROP/REMNT LOW

$$
FORECASTER ADAMS=


Original Message :

WTPZ24 KNHC 240849
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 4
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
0900 UTC MON AUG 24 2026

TROPICAL STORM CENTER LOCATED NEAR 17.8N 116.2W AT 24/0900Z
POSITION ACCURATE WITHIN 40 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 315 DEGREES AT 10 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 996 MB
MAX SUSTAINED WINDS 50 KT WITH GUSTS TO 60 KT.
50 KT....... 40NE 40SE 0SW 0NW.
34 KT.......100NE 100SE 110SW 60NW.
4 M SEAS....210NE 150SE 75SW 120NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 17.8N 116.2W AT 24/0900Z
AT 24/0600Z CENTER WAS LOCATED NEAR 17.6N 115.8W

FORECAST VALID 24/1800Z 19.0N 117.4W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 50NE 40SE 0SW 20NW.
34 KT...100NE 100SE 90SW 80NW.

FORECAST VALID 25/0600Z 20.1N 118.9W
MAX WIND 65 KT...GUSTS 80 KT.
64 KT... 20NE 0SE 0SW 0NW.
50 KT... 50NE 40SE 0SW 30NW.
34 KT...110NE 110SE 80SW 90NW.

FORECAST VALID 25/1800Z 20.9N 120.7W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 50NE 30SE 0SW 30NW.
34 KT...120NE 100SE 80SW 100NW.

FORECAST VALID 26/0600Z 21.5N 122.5W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 40NE 30SE 0SW 30NW.
34 KT...100NE 80SE 60SW 100NW.

FORECAST VALID 26/1800Z 21.9N 124.4W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 30NE 0SE 0SW 30NW.
34 KT... 80NE 60SE 50SW 80NW.

FORECAST VALID 27/0600Z 22.4N 126.3W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 60NE 40SE 30SW 60NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 28/0600Z 23.1N 130.1W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 30NE 0SE 0SW 40NW.

OUTLOOK VALID 29/0600Z 23.9N 134.1W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 17.8N 116.2W

NEXT ADVISORY AT 24/1500Z

$$
FORECASTER ADAMS=


Original Message :

WTPN33 PHNC 240400
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 004//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 004
01 ACTIVE TROPICAL CYCLONE IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
240000Z --- NEAR 16.8N 114.9W
MOVEMENT PAST SIX HOURS - 305 DEGREES AT 04 KTS
POSITION ACCURATE TO WITHIN 040 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
110 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
REPEAT POSIT: 16.8N 114.9W
---
FORECASTS:
12 HRS, VALID AT:
241200Z --- 18.1N 116.4W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 025 NM NORTHEAST QUADRANT
020 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 315 DEG/ 09 KTS
---
24 HRS, VALID AT:
250000Z --- 19.4N 117.8W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT
130 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 300 DEG/ 10 KTS
---
36 HRS, VALID AT:
251200Z --- 20.4N 119.6W
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
120 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 290 DEG/ 09 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
260000Z --- 21.0N 121.4W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 60 HR POSIT: 290 DEG/ 08 KTS
---
60 HRS, VALID AT:
261200Z --- 21.5N 123.1W
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
060 NM SOUTHEAST QUADRANT
040 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 285 DEG/ 10 KTS
---
72 HRS, VALID AT:
270000Z --- 21.9N 125.1W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 285 DEG/ 09 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
280000Z --- 22.8N 128.8W
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 030 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 120 HR POSIT: 285 DEG/ 09 KTS
---
120 HRS, VALID AT:
290000Z --- 23.6N 132.5W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
---
REMARKS:
240400Z POSITION NEAR 17.2N 115.4W.
24AUG26. TROPICAL STORM 09E (ISELLE), LOCATED APPROXIMATELY 961
NM SOUTH OF SAN DIEGO, HAS TRACKED NORTHWESTWARD AT 04 KNOTS OVER
THE PAST SIX HOURS. MINIMUM CENTRAL PRESSURE AT 240000Z IS 999 MB.
MAXIMUM SIGNIFICANT WAVE HEIGHT AT 240000Z IS 21 FEET. NEXT WARNINGS
AT 241000Z, 241600Z, 242200Z AND 250400Z. REFER TO TROPICAL STORM 01C
(LALA) WARNINGS (WTPN31 PHNC) FOR SIX-HOURLY UPDATES. REFER TO
TROPICAL DEPRESSION 02C (MOKE) WARNINGS (WTPN32 PHNC) FOR SIX-HOURLY
UPDATES.//
NNNN


Original Message :

WTPZ34 KNHC 240244
TCPEP4

BULLETIN
Tropical Storm Iselle Advisory Number 3
NWS National Hurricane Center Miami FL EP092026
800 PM PDT Sun Aug 23 2026

...ISELLE CONTINUES TO MOVE NORTHWESTWARD WELL OFFSHORE OF
MEXICO...


SUMMARY OF 800 PM PDT...0300 UTC...INFORMATION
----------------------------------------------
LOCATION...17.1N 115.3W
ABOUT 530 MI...855 KM SW OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...NW OR 310 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...999 MB...29.50 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 800 PM PDT (0300 UTC), the center of Tropical Storm Iselle was
located near latitude 17.1 North, longitude 115.3 West. Iselle is
moving toward the northwest near 12 mph (19 km/h) and this motion is
expected to continue through Monday, followed by a gradual turn
toward the west-northwest on Tuesday.

Maximum sustained winds are near 50 mph (85 km/h) with higher gusts.
Some strengthening is forecast during the next day or two, and
Iselle could become a strong tropical storm Monday night or early
Tuesday.

Tropical-storm-force winds extend outward up to 125 miles (205 km)
from the center.

The estimated minimum central pressure is 999 mb (29.50 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle will affect the west coast of the
Baja California Peninsula beginning Monday. These swells are
likely to cause life-threatening surf and rip current conditions.
Please consult products from your local weather office.


NEXT ADVISORY
-------------
Next complete advisory at 200 AM PDT.

$$
Forecaster Katz/Cangialosi


Original Message :

WTPZ44 KNHC 240245
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 3
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 PM PDT SUN AUG 23 2026

THE MOST RECENT ASCAT AND OSCAT PASSES HAVE SHOWN THAT THE STRONGEST
WINDS WITH ISELLE ARE AROUND 40 TO 45 KT. UW-CIMSS OBJECTIVE
ESTIMATES ARE IN THE 35-55 KT RANGE, AND THE MOST RECENT TAFB
SUBJECTIVE DVORAK ESTIMATE IS T3.0/45 KT. WITH ALL OF THAT DATA IN
CONSIDERATION, THE INTENSITY HAS BEEN HELD AT 45 KT FOR THIS
ADVISORY. HOWEVER, RECENT OBSERVATIONS AT ISLA CLARION HAVE RECORDED
SUSTAINED WINDS AROUND 30 TO 35 KT, GUSTING UP TO AROUND 40 KT AND
A SURFACE PRESSURE OF 1002 MB. THUS IN LIGHT OF THAT DATA, THE
CENTRAL PRESSURE FOR ISELLE HAS BEEN LOWERED TO 999 MB.

THE INITIAL MOTION ESTIMATE IS NORTHWESTWARD, OR 310 DEGREES AT 8
KT. A CONTINUED NORTHWESTWARD MOTION IS EXPECTED THROUGH MONDAY
WHILE ISELLE IS STEERED BY RIDGING OVER THE SOUTHWESTERN UNITED
STATES AND NORTHWESTERN MEXICO. AS THE RIDGE BUILDS IN SOME MORE TO
THE NORTH OF THE CYCLONE, A GRADUAL TURN TOWARD THE WEST-NORTHWEST
IS EXPECTED ON TUESDAY AND WEDNESDAY. THE CURRENT NHC TRACK IS VERY
SIMILAR TO THE PREVIOUS TRACK, ONLY MINOR ADJUSTMENTS IN SPEED AND
LOCATION HAVE BEEN MADE. THE TRACK REMAINS VERY CLOSE TO THE LASTEST
HFIP CORRECTED CONSENSUS (HCCA) MODEL AND THE GOOGLE DEEPMIND
(GDMI). THERE IS A GOOD AMOUNT OF SPREAD IN THE TRACK FORECAST
TOWARDS THE LATER PORTION OF THE FORECAST, THUS THE CONFIDENCE IS
SLIGHTLY BELOW AVERAGE.

ISELLE WILL BE TRAVELING OVER WARM WATER AND WITHIN A MOIST
ENVIRONMENT WITH WEAK TO MODERATE VERTICAL WIND SHEAR FOR THE NEXT
DAY OR SO, BUT WESTERLY VERTICAL WIND SHEAR SHOULD INCREASE TO THE
15-20 KT RANGE BY TUESDAY OR SOONER. STRENGTHENING IS EXPECTED FOR
THE NEXT 36 H. THE CURRENT NHC INTENSITY FORECAST IS ON THE HIGHER
END OF THE GUIDANCE, THUS IT IS POSSIBLE THAT ISELLE MIGHT NOT QUITE
MAKE IT TO HURRICANE STATUS. AFTER THIS PERIOD, THE CYCLONE WILL
MOVE INTO A MORE HOSTILE ENVIRONMENT WITH STRONGER SHEAR, COLDER
SEA-SURFACE TEMPERATURES, AND SOME SLIGHTLY DRIER AIR. AS SUCH, THE
STORM SHOULD PROGRESSIVELY GET WEAKER BEYOND A COUPLE OF DAYS.


FORECAST POSITIONS AND MAX WINDS

INIT 24/0300Z 17.1N 115.3W 45 KT 50 MPH
12H 24/1200Z 18.1N 116.4W 50 KT 60 MPH
24H 25/0000Z 19.4N 117.8W 60 KT 70 MPH
36H 25/1200Z 20.4N 119.6W 65 KT 75 MPH
48H 26/0000Z 21.0N 121.4W 60 KT 70 MPH
60H 26/1200Z 21.5N 123.1W 55 KT 65 MPH
72H 27/0000Z 21.9N 125.1W 50 KT 60 MPH
96H 28/0000Z 22.8N 128.8W 40 KT 45 MPH
120H 29/0000Z 23.6N 132.5W 30 KT 35 MPH...POST-TROP/REMNT LOW

$$
FORECASTER KATZ/CANGIALOSI=


Original Message :

WTPZ24 KNHC 240243
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 3
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
0300 UTC MON AUG 24 2026

TROPICAL STORM CENTER LOCATED NEAR 17.1N 115.3W AT 24/0300Z
POSITION ACCURATE WITHIN 40 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 310 DEGREES AT 10 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 999 MB
MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT.
34 KT.......100NE 100SE 110SW 0NW.
4 M SEAS....210NE 150SE 75SW 90NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 17.1N 115.3W AT 24/0300Z
AT 24/0000Z CENTER WAS LOCATED NEAR 16.8N 114.9W

FORECAST VALID 24/1200Z 18.1N 116.4W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 25NE 20SE 0SW 0NW.
34 KT...110NE 100SE 90SW 40NW.

FORECAST VALID 25/0000Z 19.4N 117.8W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 40NE 30SE 0SW 0NW.
34 KT...110NE 130SE 90SW 60NW.

FORECAST VALID 25/1200Z 20.4N 119.6W
MAX WIND 65 KT...GUSTS 80 KT.
50 KT... 40NE 30SE 0SW 30NW.
34 KT...120NE 120SE 80SW 70NW.

FORECAST VALID 26/0000Z 21.0N 121.4W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 40NE 30SE 0SW 40NW.
34 KT...120NE 100SE 60SW 70NW.

FORECAST VALID 26/1200Z 21.5N 123.1W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 40NE 30SE 0SW 30NW.
34 KT... 80NE 60SE 40SW 60NW.

FORECAST VALID 27/0000Z 21.9N 125.1W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 30NE 0SE 0SW 30NW.
34 KT... 80NE 30SE 30SW 60NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 28/0000Z 22.8N 128.8W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 30NE 0SE 0SW 40NW.

OUTLOOK VALID 29/0000Z 23.6N 132.5W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 17.1N 115.3W

NEXT ADVISORY AT 24/0900Z

$$
FORECASTER KATZ/CANGIALOSI=


Original Message :

WTPN33 PHNC 232200
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 002//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 002
01 ACTIVE TROPICAL CYCLONE IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
231800Z --- NEAR 16.6N 114.6W
MOVEMENT PAST SIX HOURS - 325 DEGREES AT 15 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
110 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
REPEAT POSIT: 16.6N 114.6W
---
FORECASTS:
12 HRS, VALID AT:
240600Z --- 18.2N 116.3W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 025 NM NORTHEAST QUADRANT
020 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT
110 NM SOUTHEAST QUADRANT
110 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 315 DEG/ 10 KTS
---
24 HRS, VALID AT:
241800Z --- 19.6N 117.8W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
130 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 310 DEG/ 10 KTS
---
36 HRS, VALID AT:
250600Z --- 20.8N 119.4W
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
140 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 290 DEG/ 08 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
251800Z --- 21.4N 121.1W
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT
110 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 60 HR POSIT: 290 DEG/ 08 KTS
---
60 HRS, VALID AT:
260600Z --- 21.9N 122.8W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 110 NM NORTHEAST QUADRANT
100 NM SOUTHEAST QUADRANT
060 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 285 DEG/ 09 KTS
---
72 HRS, VALID AT:
261800Z --- 22.4N 124.6W
MAX SUSTAINED WINDS - 050 KT, GUSTS 065 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
070 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 285 DEG/ 09 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
271800Z --- 23.3N 128.4W
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
POST-TROP/REMNT LOW
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
040 NM SOUTHEAST QUADRANT
030 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
VECTOR TO 120 HR POSIT: 285 DEG/ 09 KTS
---
120 HRS, VALID AT:
281800Z --- 24.2N 132.2W
MAX SUSTAINED WINDS - 030 KT, GUSTS 040 KT
WIND RADII VALID OVER OPEN WATER ONLY
DISSIPATED AS A SIGNIFICANT TROPICAL CYCLONE OVER WATER
---
REMARKS:
232200Z POSITION NEAR 17.1N 115.2W. 23AUG26. TROPICAL STORM 09E
(ISELLE), LOCATED APPROXIMATELY 975 NM SOUTH OF SAN DIEGO, HAS TRACKED
NORTHWESTWARD AT 15 KNOTS OVER THE PAST SIX HOURS. MINIMUM CENTRAL
PRESSURE AT 231800Z IS 1003 MB. MAXIMUM SIGNIFICANT WAVE HEIGHT AT
231800Z IS 23 FEET. NEXT WARNINGS AT 240400Z, 241000Z, 241600Z AND
242200Z.//
NNNN


Original Message :

WTPZ34 KNHC 232032
TCPEP4

BULLETIN
Tropical Storm Iselle Advisory Number 2
NWS National Hurricane Center Miami FL EP092026
200 PM PDT Sun Aug 23 2026

...ISELLE STRENGTHENS AS IT MOVES NORTHWESTWARD WELL OFFSHORE OF
MEXICO...


SUMMARY OF 200 PM PDT...2100 UTC...INFORMATION
----------------------------------------------
LOCATION...16.9N 115.1W
ABOUT 535 MI...860 KM SW OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...50 MPH...85 KM/H
PRESENT MOVEMENT...NW OR 315 DEGREES AT 16 MPH...26 KM/H
MINIMUM CENTRAL PRESSURE...1001 MB...29.56 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 200 PM PDT (2100 UTC), the center of Tropical Storm Iselle was
located near latitude 16.9 North, longitude 115.1 West. Iselle is
moving toward the northwest near 16 mph (26 km/h) and this motion is
expected to continue through Monday, followed by a gradual turn
toward the west-northwest on Tuesday.

Maximum sustained winds have increased to near 50 mph (85 km/h)
with higher gusts. Some strengthening is forecast during the next
day or two, and Iselle could become a hurricane Monday night or
early Tuesday.

Tropical-storm-force winds extend outward up to 125 miles (205 km)
from the center.

The estimated minimum central pressure is 1001 mb (29.56 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle will affect the west coast of the
Baja California Peninsula beginning Monday. These swells are
likely to cause life-threatening surf and rip current conditions.
Please consult products from your local weather office.


NEXT ADVISORY
-------------
Next complete advisory at 800 PM PDT.

$$
Forecaster Hagen


Original Message :

WTPZ44 KNHC 232032
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 2
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
200 PM PDT SUN AUG 23 2026

RECENT SATELLITE IMAGERY OVER ISELLE SHOWS A SHEAR PATTERN, WITH A
LARGE AREA OF VERY DEEP CONVECTION LOCATED IN THE SOUTHWEST
SEMICIRCLE OF ISELLE. VISIBLE IMAGERY SHOWS A PARTIALLY EXPOSED
LOW-LEVEL CENTER AT THE NORTHEAST EDGE OF THE CONVECTION. A RECENT
23/1748Z ASCAT-C OVERPASS SHOWS AN ELONGATED, BUT WELL-DEFINED
SURFACE CIRCULATION, WITH A RADIUS OF MAXIMUM WINDS (RMW) OF ABOUT
70 NAUTICAL MILES, WITH GALES IN THE NE, SE AND SW QUADRANTS. THERE
ARE SEVERAL 40-45 KT VECTORS ON THE SOUTH SIDE, AND THE INTENSITY IS
INCREASED TO 45 KT FOR THIS ADVISORY. THIS IS ABOVE THE LATEST
SUBJECTIVE DVORAK ESTIMATE FROM TAFB, WHICH IS T2.5/35 KT.

THE INITIAL MOTION ESTIMATE IS NORTHWESTWARD, OR 315 DEGREES AT 14
KT. A CONTINUED NORTHWEST MOTION IS EXPECTED THROUGH MONDAY WHILE
ISELLE IS STEERED BY RIDGING OVER THE SOUTHWESTERN UNITED STATES AND
NORTHWESTERN MEXICO. AS THE RIDGE BUILDS IN A BIT MORE TO THE NORTH
OF THE CYCLONE, A GRADUAL TURN TOWARD THE WEST-NORTHWEST IS EXPECTED
ON TUESDAY AND WEDNESDAY. THE NHC TRACK FORECAST HAS BEEN SHIFTED
WELL TO THE RIGHT (OR NORTHEAST) OF THE PREVIOUS FORECAST THROUGH 48
H, MAINLY DUE TO THE FARTHER NORTH INITIAL POSITION AND IS NEARLY ON
TOP OF THE PREVIOUS FORECAST THEREAFTER. THE NHC FORECAST IS VERY
CLOSE TO THE LATEST HFIP CORRECTED CONSENSUS (HCCA) MODEL AND THE
GOOGLE DEEPMIND (GDMI). THERE IS STILL A HEALTHY AMOUNT OF SPREAD
IN THE TRACK GUIDANCE, AND CONFIDENCE IN THE TRACK FORECAST IS
SLIGHTLY BELOW AVERAGE.

ISELLE WILL BE TRAVELING OVER WARM WATER AND WITHIN A MOIST
ENVIRONMENT WITH WEAK TO MODERATE VERTICAL WIND SHEAR FOR THE NEXT
DAY OR SO, BUT WESTERLY VERTICAL WIND SHEAR SHOULD INCREASE TO THE
15-20 KT RANGE BY TUESDAY OR SOONER. STRENGTHENING IS EXPECTED FOR
THE NEXT 36 H. THEREAFTER, ISELLE WILL BE MOVING INTO A MORE
STABLE ENVIRONMENT, WITH GRADUALLY DECREASING SEA-SURFACE
TEMPERATURES, SO WEAKENING IS EXPECTED TO BEGIN BY TUESDAY NIGHT
OR WEDNESDAY. ONLY SMALL CHANGES HAVE BEEN MADE TO THE NHC
INTENSITY FORECAST, WHICH LIES BETWEEN THE MIDDLE AND HIGH END OF
THE GUIDANCE ENVELOPE FOR MOST OF THE FORECAST PERIOD. RAPID
INTENSIFICATION IS BECOMING LESS LIKELY BECAUSE THE RMW IS STILL
LARGE, AND THE SYSTEM HAS AT MOST 36-48 H LEFT TO STRENGTHEN.


FORECAST POSITIONS AND MAX WINDS

INIT 23/2100Z 16.9N 115.1W 45 KT 50 MPH
12H 24/0600Z 18.2N 116.3W 50 KT 60 MPH
24H 24/1800Z 19.6N 117.8W 60 KT 70 MPH
36H 25/0600Z 20.8N 119.4W 65 KT 75 MPH
48H 25/1800Z 21.4N 121.1W 65 KT 75 MPH
60H 26/0600Z 21.9N 122.8W 60 KT 70 MPH
72H 26/1800Z 22.4N 124.6W 50 KT 60 MPH
96H 27/1800Z 23.3N 128.4W 45 KT 50 MPH
120H 28/1800Z 24.2N 132.2W 30 KT 35 MPH...POST-TROP/REMNT LOW

$$
FORECASTER HAGEN=


Original Message :

WTPZ24 KNHC 232031
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 2
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
2100 UTC SUN AUG 23 2026

TROPICAL STORM CENTER LOCATED NEAR 16.9N 115.1W AT 23/2100Z
POSITION ACCURATE WITHIN 40 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 315 DEGREES AT 14 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1001 MB
MAX SUSTAINED WINDS 45 KT WITH GUSTS TO 55 KT.
34 KT.......100NE 100SE 110SW 0NW.
4 M SEAS.... 90NE 90SE 45SW 0NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 16.9N 115.1W AT 23/2100Z
AT 23/1800Z CENTER WAS LOCATED NEAR 16.6N 114.6W

FORECAST VALID 24/0600Z 18.2N 116.3W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 25NE 20SE 0SW 0NW.
34 KT...110NE 110SE 110SW 40NW.

FORECAST VALID 24/1800Z 19.6N 117.8W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 40NE 30SE 0SW 0NW.
34 KT...120NE 130SE 90SW 60NW.

FORECAST VALID 25/0600Z 20.8N 119.4W
MAX WIND 65 KT...GUSTS 80 KT.
64 KT... 15NE 0SE 0SW 0NW.
50 KT... 40NE 30SE 0SW 30NW.
34 KT...120NE 140SE 80SW 70NW.

FORECAST VALID 25/1800Z 21.4N 121.1W
MAX WIND 65 KT...GUSTS 80 KT.
64 KT... 15NE 0SE 0SW 0NW.
50 KT... 40NE 30SE 0SW 40NW.
34 KT...130NE 110SE 60SW 90NW.

FORECAST VALID 26/0600Z 21.9N 122.8W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 40NE 30SE 0SW 30NW.
34 KT...110NE 100SE 60SW 90NW.

FORECAST VALID 26/1800Z 22.4N 124.6W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 30NE 0SE 0SW 30NW.
34 KT...100NE 70SE 50SW 80NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 27/1800Z 23.3N 128.4W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 60NE 40SE 30SW 60NW.

OUTLOOK VALID 28/1800Z 24.2N 132.2W...POST-TROP/REMNT LOW
MAX WIND 30 KT...GUSTS 40 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 16.9N 115.1W

NEXT ADVISORY AT 24/0300Z

$$
FORECASTER HAGEN=


Original Message :

WTPN33 PHNC 231600
MSGID/GENADMIN/JOINT TYPHOON WRNCEN PEARL HARBOR HI//
SUBJ/TROPICAL STORM 09E (ISELLE) WARNING NR 001//
REF/A/MSG/JOINT TYPHOON WRNCEN PEARL HARBOR HI/221251ZAUG2026//
AMPN/REF A IS A TROPICAL CYCLONE FORMATION ALERT.//
RMKS/
1. TROPICAL STORM 09E (ISELLE) WARNING NR 001
01 ACTIVE TROPICAL CYCLONES IN EASTPAC
MAX SUSTAINED WINDS BASED ON ONE-MINUTE AVERAGE
WIND RADII VALID OVER OPEN WATER ONLY
---
WARNING POSITION:
231200Z --- NEAR 14.9N 113.7W
MOVEMENT PAST SIX HOURS - 300 DEGREES AT 12 KTS
POSITION ACCURATE TO WITHIN 060 NM
POSITION BASED ON CENTER LOCATED BY SATELLITE
PRESENT WIND DISTRIBUTION:
MAX SUSTAINED WINDS - 040 KT, GUSTS 050 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
REPEAT POSIT: 14.9N 113.7W
---
FORECASTS:
12 HRS, VALID AT:
240000Z --- 16.5N 115.6W
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
110 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
VECTOR TO 24 HR POSIT: 315 DEG/ 10 KTS
---
24 HRS, VALID AT:
241200Z --- 17.9N 117.2W
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
020 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
130 NM SOUTHEAST QUADRANT
090 NM SOUTHWEST QUADRANT
070 NM NORTHWEST QUADRANT
VECTOR TO 36 HR POSIT: 315 DEG/ 10 KTS
---
36 HRS, VALID AT:
250000Z --- 19.3N 118.7W
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT
140 NM SOUTHEAST QUADRANT
080 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 48 HR POSIT: 310 DEG/ 10 KTS
---
EXTENDED OUTLOOK:
48 HRS, VALID AT:
251200Z --- 20.5N 120.3W
MAX SUSTAINED WINDS - 065 KT, GUSTS 080 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 064 KT WINDS - 015 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
000 NM NORTHWEST QUADRANT
RADIUS OF 050 KT WINDS - 050 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
040 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 130 NM NORTHEAST QUADRANT
120 NM SOUTHEAST QUADRANT
070 NM SOUTHWEST QUADRANT
100 NM NORTHWEST QUADRANT
VECTOR TO 60 HR POSIT: 300 DEG/ 09 KTS
---
60 HRS, VALID AT:
260000Z --- 21.4N 121.9W
MAX SUSTAINED WINDS - 060 KT, GUSTS 075 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 040 NM NORTHEAST QUADRANT
030 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 120 NM NORTHEAST QUADRANT
110 NM SOUTHEAST QUADRANT
070 NM SOUTHWEST QUADRANT
100 NM NORTHWEST QUADRANT
VECTOR TO 72 HR POSIT: 290 DEG/ 08 KTS
---
72 HRS, VALID AT:
261200Z --- 22.0N 123.6W
MAX SUSTAINED WINDS - 055 KT, GUSTS 070 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 050 KT WINDS - 030 NM NORTHEAST QUADRANT
020 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
030 NM NORTHWEST QUADRANT
RADIUS OF 034 KT WINDS - 100 NM NORTHEAST QUADRANT
080 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
090 NM NORTHWEST QUADRANT
VECTOR TO 96 HR POSIT: 285 DEG/ 09 KTS
---
LONG RANGE OUTLOOK:
---
96 HRS, VALID AT:
271200Z --- 23.0N 127.2W
MAX SUSTAINED WINDS - 045 KT, GUSTS 055 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 080 NM NORTHEAST QUADRANT
050 NM SOUTHEAST QUADRANT
050 NM SOUTHWEST QUADRANT
080 NM NORTHWEST QUADRANT
VECTOR TO 120 HR POSIT: 285 DEG/ 09 KTS
---
120 HRS, VALID AT:
281200Z --- 23.9N 130.8W
MAX SUSTAINED WINDS - 035 KT, GUSTS 045 KT
WIND RADII VALID OVER OPEN WATER ONLY
RADIUS OF 034 KT WINDS - 060 NM NORTHEAST QUADRANT
000 NM SOUTHEAST QUADRANT
000 NM SOUTHWEST QUADRANT
060 NM NORTHWEST QUADRANT
---
REMARKS:
231600Z POSITION NEAR 15.4N 114.3W. 23AUG26. TROPICAL STORM 09E
(ISELLE), LOCATED APPROXIMATELY 1084 NM SOUTH OF SAN DIEGO, HAS
TRACKED WEST-NORTHWESTWARD AT 12 KNOTS OVER THE PAST SIX HOURS.
MINIMUM CENTRAL PRESSURE AT 231200Z IS 1003 MB. MAXIMUM SIGNIFICANT
WAVE HEIGHT AT 231200Z IS 16 FEET. NEXT WARNINGS AT 232200Z, 240400Z,
241000Z AND 241600Z.
2. THIS CANCELS AND SUPERSEDES REF A (WTPN22 PHNC 221300).//
NNNN


Original Message :

WTPZ34 KNHC 231446
TCPEP4

BULLETIN
Tropical Storm Iselle Advisory Number 1
NWS National Hurricane Center Miami FL EP092026
800 AM MST Sun Aug 23 2026

...TROPICAL STORM ISELLE FORMS WELL OFFSHORE OF MEXICO...


SUMMARY OF 800 AM MST...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...15.3N 114.2W
ABOUT 595 MI...955 KM SSW OF THE SOUTHERN TIP OF BAJA CALIFORNIA
MAXIMUM SUSTAINED WINDS...45 MPH...75 KM/H
PRESENT MOVEMENT...WNW OR 300 DEGREES AT 12 MPH...19 KM/H
MINIMUM CENTRAL PRESSURE...1003 MB...29.62 INCHES


WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.


DISCUSSION AND OUTLOOK
----------------------
At 800 AM MST (1500 UTC), the center of Tropical Storm Iselle was
located near latitude 15.3 North, longitude 114.2 West. Iselle is
moving toward the west-northwest near 12 mph (19 km/h). A
northwestward motion is expected through Monday, followed by a
gradual turn back toward the west-northwest on Tuesday.

Maximum sustained winds are near 45 mph (75 km/h) with higher gusts.
Some strengthening is forecast during the next couple of days, and
Iselle could become a hurricane late Monday or early Tuesday.

Tropical-storm-force winds extend outward up to 105 miles (165 km)
from the center.

The estimated minimum central pressure is 1003 mb (29.62 inches).


HAZARDS AFFECTING LAND
----------------------
SURF: Swells generated by Iselle will affect the west coast of the
Baja California Peninsula beginning Monday. These swells are
likely to cause life-threatening surf and rip current conditions.
Please consult products from your local weather office.


NEXT ADVISORY
-------------
Next complete advisory at 200 PM MST.

$$
Forecaster Hagen


Original Message :

WTPZ44 KNHC 231446
TCDEP4

TROPICAL STORM ISELLE DISCUSSION NUMBER 1
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
800 AM MST SUN AUG 23 2026

THE AREA OF LOW PRESSURE THAT WE HAVE BEEN MONITORING FOR THE PAST
SEVERAL DAYS (EP92) HAS HAD GALE-FORCE WINDS AND SUFFICIENTLY
WELL-ORGANIZED CONVECTION FOR THE PAST 12 H OR SO. THE ASCAT-C PASS
FROM 23/0517Z SHOWED WINDS OF 40 KT, AND THAT THE SYSTEM DID NOT YET
HAVE A WELL-DEFINED CIRCULATION, ALTHOUGH IT WAS CLOSER THAN IT WAS
ON THE PREVIOUS PASS FROM 12 H EARLIER. AN OSCAT PASS A COUPLE
HOURS LATER AROUND 23/0716Z SUGGESTED THAT THE SURFACE CIRCULATION
WAS CONTINUING TO BECOME BETTER-DEFINED. SINCE THAT TIME, SATELLITE
IMAGERY INDICATES CONTINUED CONSOLIDATION OF DEEP CONVECTION OVER
THE LOW-LEVEL CENTER, AND THE SYSTEM VERY LIKELY HAS A WELL-DEFINED
CIRCULATION BY NOW. THUS, EP92 IS UPGRADED TO TROPICAL STORM
ISELLE, AND THE CURRENT INTENSITY IS ESTIMATED AT 40 KT BASED ON THE
SCATTEROMETER DATA.

THERE HAVE BEEN NO OTHER RECENT MICROWAVE PASSES, AND THE CONFIDENCE
IN THE INITIAL POSITION IS LOW. THE INITIAL MOTION IS ESTIMATED TO
BE WEST-NORTHWESTWARD, OR 300 DEGREES AT 10 KT. A NORTHWESTWARD
MOTION IS EXPECTED THROUGH MONDAY WHILE ISELLE IS STEERED BY RIDGING
OVER THE SOUTHWESTERN UNITED STATES AND NORTHWESTERN MEXICO. AS THE
RIDGE BUILDS IN A BIT MORE TO THE NORTH OF THE CYCLONE, A GRADUAL
TURN TOWARD THE WEST-NORTHWEST IS EXPECTED ON TUESDAY AND WEDNESDAY.
THE NHC TRACK FORECAST CLOSELY FOLLOWS THE HFIP CORRECTED CONSENSUS
(HCCA) MODEL AND THE GOOGLE DEEPMIND (GDMI), WHICH IS ON THE
NORTHERN SIDE OF THE GUIDANCE ENVELOPE. THERE IS A HEALTHY AMOUNT
OF SPREAD IN THE TRACK GUIDANCE, AND CONFIDENCE IN THE TRACK
FORECAST IS SLIGHTLY BELOW AVERAGE.

ISELLE WILL BE TRAVELING OVER WARM WATER AND WITHIN A MOIST
ENVIRONMENT WITH WEAK VERTICAL WIND SHEAR FOR THE NEXT COUPLE OF
DAYS. ONLY SLOW INTENSIFICATION IS FORECAST DURING THE NEXT 12 H AS
THE CYCLONE ATTEMPTS TO CONSOLIDATE AND FORM A CORE. GIVEN THE
FAVORABLE ENVIRONMENT, STEADY STRENGTHENING IS FORECAST TONIGHT AND
MONDAY, AND THE NHC FORECAST SHOWS ISELLE REACHING HURRICANE
STRENGTH MONDAY NIGHT. BY TUESDAY NIGHT, A MODEST INCREASE IN
WEST-SOUTHWESTERLY VERTICAL WIND SHEAR AND DECREASING SEA-SURFACE
TEMPERATURES ALONG ISELLE'S PATH SHOULD LEAD TO GRADUAL WEAKENING.
THE NHC INTENSITY FORECAST LIES NEAR THE INTENSITY CONSENSUS AND THE
HURRICANE REGIONAL MODEL SOLUTIONS.


FORECAST POSITIONS AND MAX WINDS

INIT 23/1500Z 15.3N 114.2W 40 KT 45 MPH
12H 24/0000Z 16.5N 115.6W 45 KT 50 MPH
24H 24/1200Z 17.9N 117.2W 55 KT 65 MPH
36H 25/0000Z 19.3N 118.7W 65 KT 75 MPH
48H 25/1200Z 20.5N 120.3W 65 KT 75 MPH
60H 26/0000Z 21.4N 121.9W 60 KT 70 MPH
72H 26/1200Z 22.0N 123.6W 55 KT 65 MPH
96H 27/1200Z 23.0N 127.2W 45 KT 50 MPH
120H 28/1200Z 23.9N 130.8W 35 KT 40 MPH

$$
FORECASTER HAGEN=


Original Message :

WTPZ24 KNHC 231445
TCMEP4

TROPICAL STORM ISELLE FORECAST/ADVISORY NUMBER 1
NWS NATIONAL HURRICANE CENTER MIAMI FL EP092026
1500 UTC SUN AUG 23 2026

TROPICAL STORM CENTER LOCATED NEAR 15.3N 114.2W AT 23/1500Z
POSITION ACCURATE WITHIN 60 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 300 DEGREES AT 10 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1003 MB
MAX SUSTAINED WINDS 40 KT WITH GUSTS TO 50 KT.
34 KT....... 80NE 80SE 90SW 0NW.
4 M SEAS.... 60NE 60SE 0SW 0NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT...CENTER LOCATED NEAR 15.3N 114.2W AT 23/1500Z
AT 23/1200Z CENTER WAS LOCATED NEAR 14.9N 113.7W

FORECAST VALID 24/0000Z 16.5N 115.6W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT...100NE 110SE 90SW 40NW.

FORECAST VALID 24/1200Z 17.9N 117.2W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 30NE 30SE 0SW 20NW.
34 KT...120NE 130SE 90SW 70NW.

FORECAST VALID 25/0000Z 19.3N 118.7W
MAX WIND 65 KT...GUSTS 80 KT.
64 KT... 15NE 0SE 0SW 0NW.
50 KT... 40NE 30SE 0SW 30NW.
34 KT...130NE 140SE 80SW 80NW.

FORECAST VALID 25/1200Z 20.5N 120.3W
MAX WIND 65 KT...GUSTS 80 KT.
64 KT... 15NE 0SE 0SW 0NW.
50 KT... 50NE 30SE 0SW 40NW.
34 KT...130NE 120SE 70SW 100NW.

FORECAST VALID 26/0000Z 21.4N 121.9W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 40NE 30SE 0SW 30NW.
34 KT...120NE 110SE 70SW 100NW.

FORECAST VALID 26/1200Z 22.0N 123.6W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 30NE 20SE 0SW 30NW.
34 KT...100NE 80SE 50SW 90NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 100 NM
ON DAY 4 AND 125 NM ON DAY 5...AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 27/1200Z 23.0N 127.2W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 80NE 50SE 50SW 80NW.

OUTLOOK VALID 28/1200Z 23.9N 130.8W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 60NE 0SE 0SW 60NW.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 15.3N 114.2W

NEXT ADVISORY AT 23/2100Z

$$
FORECASTER HAGEN=