Overall Green Tropical Cyclone for TWO-C-26 Off-shore from 20 Aug 2026 15:00 UTC to 21:00

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Overall Green Tropical Cyclone for TWO-C-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.

Measurements Levels

SOURCE	GAUGE LOCATION	LAT	LON	TIME (UTC)	HEIGHT (m)	PERIOD (min)

20/08 20:40 WTPA43PHFO202039

20/08 20:39 WTPA33PHFO202039

20/08 20:39 WTPA23PHFO202038

20/08 14:56 WTPA43PHFO201455

20/08 14:54 WTPA23PHFO201454

Original Message :

WTPA43 PHFO 202039
TCDCP3

Tropical Depression Two-C Discussion Number 2
NWS Central Pacific Hurricane Center Honolulu HI CP022026
Issued by NWS National Hurricane Center Miami FL
1100 AM HST Thu Aug 20 2026

The convection around Tropical Depression Two-C has continued to
show some improvements since the last advisory, and the low-level
circulation is a little better defined, as evident in satellite
data. The objective Dvorak estimates range between 22-33 kt and the
subjective estimates from JTWC and HFO are 1.5/25 kt and 2.0/30 kt,
respectively. Based on these estimates, the initial intensity
remains 30 kt. Both NOAA and Air Force aircraft reconnaissance
will investigate the cyclone tomorrow.

The system appears to be moving west-northwestward at about 13 kt,
and that motion is expected to persist for the next 48 hours or so
until the ridge north of it strengthens. This steering flow is
expected to force the system to turn more toward the west in a few
days. The current NHC track lies on the northern side of the
guidance envelope, but there is some uncertainty in the details in
regards to the strength of the ridge and a nearby trough. It is
important to note that the NHC track error at 72 h is about 75 n mi,
and interests in the Hawaiian Islands, especially the Big Island,
should monitor the progress of this system. The latest NHC track is
slightly south of the previous one, but there is not much else in
the way of change.

The cyclone is expected to be in a mostly favorable environment for
the next couple of days, which should allow for gradual
strengthening to a high-end tropical storm or a category one
hurricane as the system moves toward the Hawaiian Islands. Beyond
that time, wind shear will likely start to increase and dry air will
also begin to to intrude into the cyclone. The current NHC intensity
forecast calls for a peak wind speed of 55 kt this weekend, with
gradual weakening occuring after that. This forecast lies is a
little lower than the previous one but remains near the high end of
the model guidance.

Key Messages:

1. The tropical depression is expected to strengthen while it moves
west-northwestward toward the Hawaiian Islands late this week and
this weekend.

2. Heavy rainfall associated with Tropical Depression Two-C is
expected to begin to impact the Big Island of Hawaii late Saturday
night, spreading westward across the remainder of the Hawaiian
Islands Sunday into Monday. This rainfall may produce
life-threatening flooding and mudslides, especially in steep terrain
and over areas that were affected recently by Lala.

3. There is a risk of wind and wave impacts in the Hawaiian Islands
regardless of the exact track and intensity of the system. Watches
may be required for portions of the Hawaiian Islands tonight or
Friday and residents there should closely monitor the latest
forecast updates and ensure that they have their preparedness plan
in place.

FORECAST POSITIONS AND MAX WINDS

INIT 20/2100Z 12.5N 143.8W 30 KT 35 MPH
12H 21/0600Z 12.9N 145.1W 35 KT 40 MPH
24H 21/1800Z 13.5N 146.5W 40 KT 45 MPH
36H 22/0600Z 14.4N 148.1W 45 KT 50 MPH
48H 22/1800Z 15.2N 150.0W 50 KT 60 MPH
60H 23/0600Z 15.9N 152.2W 55 KT 65 MPH
72H 23/1800Z 16.4N 154.5W 50 KT 60 MPH
96H 24/1800Z 17.2N 159.2W 45 KT 50 MPH
120H 25/1800Z 18.3N 163.6W 40 KT 45 MPH

$$
Forecaster Katz/Cangialosi

Original Message :

WTPA33 PHFO 202039
TCPCP3

BULLETIN
TROPICAL DEPRESSION TWO-C ADVISORY NUMBER 2
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI CP022026
ISSUED BY NWS NATIONAL HURRICANE CENTER MIAMI FL
1100 AM HST THU AUG 20 2026

...TROPICAL DEPRESSION COULD BRING HEAVY RAINFALL TO PORTIONS
OF THE HAWAIIAN ISLANDS THIS WEEKEND AND EARLY NEXT WEEK...

SUMMARY OF 1100 AM HST...2100 UTC...INFORMATION
-----------------------------------------------
LOCATION...12.5N 143.8W
ABOUT 900 MI...1445 KM ESE OF HILO HAWAII
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...WNW OR 300 DEGREES AT 15 MPH...24 KM/H
MINIMUM CENTRAL PRESSURE...1006 MB...29.71 INCHES

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

INTERESTS IN THE HAWAIIAN ISLANDS SHOULD CLOSELY MONITOR THE
PROGRESS OF THIS SYSTEM. WATCHES MAY BE REQUIRED FOR A PORTION OF
THE HAWAIIAN ISLANDS TONIGHT OR FRIDAY.

DISCUSSION AND OUTLOOK
----------------------
AT 1100 AM HST (2100 UTC), THE CENTER OF TROPICAL DEPRESSION TWO-C
WAS LOCATED NEAR LATITUDE 12.5 NORTH, LONGITUDE 143.8 WEST. THE
DEPRESSION IS MOVING TOWARD THE WEST-NORTHWEST NEAR 15 MPH (24 KM/H)
AND THIS GENERAL MOTION IS EXPECTED DURING THE NEXT FEW DAYS. ON
THE FORECAST TRACK, THE CENTER OF THE SYSTEM IS EXPECTED TO PASS
NEAR OR SOUTH OF THE BIG ISLAND OF HAWAII THIS WEEKEND.

MAXIMUM SUSTAINED WINDS ARE NEAR 35 MPH (55 KM/H) WITH HIGHER GUSTS.
GRADUAL STRENGTHENING IS FORECAST, AND THE DEPRESSION COULD BECOME A
TROPICAL STORM LATER TODAY.

THE ESTIMATED MINIMUM CENTRAL PRESSURE IS 1006 MB (29.71 INCHES).

HAZARDS AFFECTING LAND
----------------------
KEY MESSAGES FOR TROPICAL DEPRESSION TWO-C CAN BE FOUND IN
THE TROPICAL CYCLONE DISCUSSION UNDER AWIPS HEADER HFOTCPCP3 AND
WMO HEADER WTPA43 PHFO.

RAINFALL: THE TROPICAL DEPRESSION IS EXPECTED TO PRODUCE RAINFALL
TOTALS OF 5 TO 10 INCHES WITH MAXIMUM AMOUNTS OF 15 INCHES ACROSS
THE BIG ISLAND. RAINFALL TOTALS OF 1 TO 3 INCHES WITH MAXIMUM
AMOUNTS OF 5 INCHES ARE EXPECTED ACROSS THE REMAINDER OF THE
HAWAIIAN ISLANDS THIS WEEKEND AND EARLY NEXT WEEK. THIS RAINFALL
MAY PRODUCE LIFE-THREATENING FLOODING AND MUDSLIDES, ESPECIALLY IN
STEEP TERRAIN AND OVER AREAS THAT WERE AFFECTED RECENTLY BY LALA.

SURF: SWELLS GENERATED BY THE DEPRESSION ARE EXPECTED TO AFFECT
PORTIONS OF THE HAWAIIAN ISLANDS THS WEEKEND, AND COULD CAUSE
LIFE-THREATENING SURF AND RIP CURRENT CONDITIONS. PLEASE CONSULT
PRODUCTS FROM YOUR LOCAL WEATHER OFFICE.

NEXT ADVISORY
-------------
NEXT COMPLETE ADVISORY AT 500 PM HST.

$$
FORECASTER KATZ/CANGIALOSI=

Original Message :

WTPA23 PHFO 202038
TCMCP3

TROPICAL DEPRESSION TWO-C FORECAST/ADVISORY NUMBER 2
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI CP022026
ISSUED BY NWS NATIONAL HURRICANE CENTER MIAMI FL
2100 UTC THU AUG 20 2026

TROPICAL DEPRESSION CENTER LOCATED NEAR 12.5N 143.8W AT 20/2100Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 300 DEGREES AT 13 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB
MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT.
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 12.5N 143.8W AT 20/2100Z
AT 20/1800Z CENTER WAS LOCATED NEAR 12.3N 143.4W

FORECAST VALID 21/0600Z 12.9N 145.1W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 30NE 0SE 0SW 0NW.

FORECAST VALID 21/1800Z 13.5N 146.5W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 30NE 0SE 0SW 0NW.

FORECAST VALID 22/0600Z 14.4N 148.1W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 50NE 30SE 0SW 30NW.

FORECAST VALID 22/1800Z 15.2N 150.0W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 20NE 0SE 0SW 10NW.
34 KT... 60NE 30SE 20SW 40NW.

FORECAST VALID 23/0600Z 15.9N 152.2W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 30NE 0SE 0SW 20NW.
34 KT... 70NE 40SE 20SW 50NW.

FORECAST VALID 23/1800Z 16.4N 154.5W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 20NE 0SE 0SW 10NW.
34 KT... 60NE 40SE 20SW 40NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY

OUTLOOK VALID 24/1800Z 17.2N 159.2W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 50NE 20SE 0SW 20NW.

OUTLOOK VALID 25/1800Z 18.3N 163.6W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 50NE 0SE 0SW 20NW.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 12.5N 143.8W

NEXT ADVISORY AT 21/0300Z

$$
FORECASTER KATZ=

Original Message :

WTPA43 PHFO 201455
TCDCP3

Tropical Depression Two-C Discussion Number 1
NWS Central Pacific Hurricane Center Honolulu HI CP022026
Issued by NWS National Hurricane Center Miami FL
500 AM HST Thu Aug 20 2026

The system that NHC has been monitoring (invest 90E) over the
central Pacific now has developed a sufficient amount of convective
organization that has been steadily increasing over the last
several hours. In addition, the low-level circulation has been
getting better defined, as evident in satellite data, therefore
the system now meets the criteria of a tropical cyclone. The
ASCAT pass from last night shows that the circulation is located
near the eastern edge of the convection and generally supports an
initial intensity of about 30 kt.

The system appears to be moving west-northwestward at about 14 kt,
and that motion is expected to persist for the next 48 hours or so
until the ridge north of it strengthens. This steering flow is
expected to force the system to turn more toward the west in a few
days. The current NHC track lies on the northern side of the
guidance envelope, but there is some uncertainty in the details in
regards to the strength of the ridge and a nearby trough. It is
important to note that the NHC track error at 72 h is about 75 n mi,
and interests in the Hawaiian Islands, especially the Big Island,
should monitor the progress of this system.

The cyclone is expected to be in a mostly favorable environment
for the next couple of days, which should allow for gradual
strengthening to a high-end tropical storm or a category one
hurricane as the system moves toward the Hawaiian Islands. Beyond
that time, wind shear will likely start to increase and dry air will
also begin to to intrude into the cyclone. The current NHC intensity
forecast calls for a peak wind speed of 60 kt this weekend, with
gradual weakening occuring after that. This forecast lies near the
high end of the model guidance.

Key Messages:

1. The tropical depression is expected to strengthen while it moves
west-northwestward toward the Hawaiian Islands late this week and
this weekend. Although it is too soon to specify the exact location
and magnitude of impacts, residents should closely monitor the
latest forecast updates and ensure that they have their preparedness
plan in place.

2. Heavy rainfall associated with Tropical Depression Two-C is
expected to begin to impact the Big Island of Hawaii late Saturday
night, spreading westward across the remainder of the Hawaiian
Islands Sunday into Monday. This rainfall may produce
life-threatening flooding and mudslides, especially in steep terrain
and over areas that were affected recently by Lala.

3. There is a risk of wind and wave impacts in the Hawaiian
Islands regardless of the exact track and intensity of the system
Watches may be required for portions of the Hawaiian Islands
tonight or Friday.

FORECAST POSITIONS AND MAX WINDS

INIT 20/1500Z 11.9N 143.1W 30 KT 35 MPH
12H 21/0000Z 12.4N 144.5W 35 KT 40 MPH
24H 21/1200Z 13.1N 145.9W 40 KT 45 MPH
36H 22/0000Z 14.0N 147.5W 45 KT 50 MPH
48H 22/1200Z 15.0N 149.4W 50 KT 60 MPH
60H 23/0000Z 15.6N 151.4W 60 KT 70 MPH
72H 23/1200Z 16.3N 153.7W 55 KT 65 MPH
96H 24/1200Z 17.2N 158.6W 50 KT 60 MPH
120H 25/1200Z 18.3N 163.2W 45 KT 50 MPH

$$
Forecaster Katz/Cangialosi

Original Message :

WTPA23 PHFO 201454
TCMCP3

TROPICAL DEPRESSION TWO-C FORECAST/ADVISORY NUMBER 1
NWS CENTRAL PACIFIC HURRICANE CENTER HONOLULU HI CP022026
ISSUED BY NWS NATIONAL HURRICANE CENTER MIAMI FL
1500 UTC THU AUG 20 2026

TROPICAL DEPRESSION CENTER LOCATED NEAR 11.9N 143.1W AT 20/1500Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST-NORTHWEST OR 295 DEGREES AT 14 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1006 MB
MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT.
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 11.9N 143.1W AT 20/1500Z
AT 20/1200Z CENTER WAS LOCATED NEAR 11.7N 142.6W

FORECAST VALID 21/0000Z 12.4N 144.5W
MAX WIND 35 KT...GUSTS 45 KT.
34 KT... 30NE 0SE 0SW 30NW.

FORECAST VALID 21/1200Z 13.1N 145.9W
MAX WIND 40 KT...GUSTS 50 KT.
34 KT... 30NE 10SE 0SW 30NW.

FORECAST VALID 22/0000Z 14.0N 147.5W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 50NE 20SE 10SW 40NW.

FORECAST VALID 22/1200Z 15.0N 149.4W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 20NE 0SE 0SW 20NW.
34 KT... 60NE 40SE 20SW 40NW.

FORECAST VALID 23/0000Z 15.6N 151.4W
MAX WIND 60 KT...GUSTS 75 KT.
50 KT... 30NE 20SE 10SW 30NW.
34 KT... 70NE 50SE 40SW 50NW.

FORECAST VALID 23/1200Z 16.3N 153.7W
MAX WIND 55 KT...GUSTS 65 KT.
50 KT... 30NE 0SE 0SW 30NW.
34 KT... 60NE 40SE 40SW 50NW.

EXTENDED OUTLOOK. NOTE...ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 200 NM ON DAY 5...AND FOR INTENSITY NEAR 20 KT EACH DAY

OUTLOOK VALID 24/1200Z 17.2N 158.6W
MAX WIND 50 KT...GUSTS 60 KT.
50 KT... 20NE 0SE 0SW 20NW.
34 KT... 60NE 20SE 10SW 50NW.

OUTLOOK VALID 25/1200Z 18.3N 163.2W
MAX WIND 45 KT...GUSTS 55 KT.
34 KT... 50NE 30SE 20SW 40NW.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 11.9N 143.1W

NEXT ADVISORY AT 20/2100Z

$$
FORECASTER KATZ/CANGIALOSI=

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