Overall Green Tropical Cyclone for TWENTYSIX-26 in Northern Mariana Islands from 30 Sep 2026 00:00 UTC to 12:00

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Overall Green Tropical Cyclone for TWENTYSIX-26

in Northern Mariana Islands

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)

30/09 16:11 WTPQ32PGUM301610

30/09 13:07 WTPQ32PGUM301306

30/09 10:37 WTPQ32PGUM301035CCA

30/09 09:45 WTPQ32PGUM300944

30/09 07:29 WTPQ32PGUM300728

30/09 03:32 WTPQ32PGUM300330

Original Message :

WTPQ32 PGUM 301610
TCPPQ2

BULLETIN
Tropical Storm 26W Advisory Number 3
National Weather Service Tiyan GU WP262026
210 AM ChST Thu Oct 1 2026

...26W UPGRADED TO TROPICAL STORM AS IT APPROACHES THE NORTHERN
CNMI...
...TROPICAL STORM WARNING NOW IN EFFECT FOR ALAMAGAN AND PAGAN...
...TYPHOON WATCH NOW IN EFFECT FOR ALAMAGAN AND PAGAN...

CHANGES WITH THIS ADVISORY
--------------------------
26W has been upgraded to a Tropical Storm.
A Tropical Storm Warning is now in effect for Alamagan and Pagan
in the CNMI.
A Typhoon Watch is now in effect for Alamagan and Pagan.
A Tropical Storm Watch remains in effect for Tinian, Saipan, and
Agrihan in the CNMI.

WATCHES AND WARNINGS
--------------------
A Tropical Storm Warning is now in effect for Alamagan and Pagan
in the CNMI.
A Typhoon Watch is now in effect for Alamagan and Pagan.
A Tropical Storm Watch remains in effect for Tinian, Saipan, and
Agrihan in the CNMI.

A Tropical Storm Watch means that tropical storm conditions,
including winds of 39 to 73 mph, are possible within 48 hours.

A Typhoon Watch means that typhoon conditions, including winds of
74 mph or more, are possible within 48 hours.

A Tropical Storm Warning means that tropical storm conditions are
expected within 24 hours.

SUMMARY OF 100 AM CHST...1500 UTC...INFORMATION
-----------------------------------------------
Location...16.1N 150.5E

About 320 miles east of Anatahan
About 325 miles east-northeast of Saipan
About 325 miles east-southeast of Alamagan
About 335 miles east-northeast of Tinian
About 340 miles east-southeast of Pagan
About 365 miles east-southeast of Agrihan
About 375 miles east-northeast of Rota
About 420 miles east-northeast of Guam

Maximum sustained winds...40 mph
Present movement...west-northwest...285 degrees at 5 mph

DISCUSSION AND OUTLOOK
----------------------
At 100 AM CHST...1500 UTC...the center of Tropical Storm 26W was
located near Latitude 16.1 degrees North and Longitude
150.5 degrees East. 26W is moving west-northwest at 5 mph. It is
expected to make a slight turn toward the west, then north-northwest,
with a slight increase in forward speed through Friday. The latest
forecast shows an intensifying 26W will move into the CNMI on
Friday, curving north-northeast as it nears Alamagan Friday night
as a Category 1 typhoon, then pass near Pagan and east of Agrihan
Saturday.

Maximum sustained winds have increased to 40 mph. 26W is forecast
to intensify through Friday, potentially becoming a typhoon late
Friday morning.

Tropical storm force winds extend outward from the center up to
100 miles to the northwest.

NEXT ADVISORY
-------------
An intermediate advisory will be issued by the National Weather
Service at 500 AM ChST followed by the next scheduled advisory at
800 AM ChST.

$$

DeCou

Original Message :

WTPQ32 PGUM 301306
TCPPQ2

BULLETIN
Tropical Depression 26W Intermediate Advisory Number 2A
National Weather Service Tiyan GU WP262026
1106 PM ChST Wed Sep 30 2026

...TROPICAL DEPRESSION TWENTY-SIX CONTINUES WEST TOWARD THE
NORTHERN CNMI...

CHANGES WITH THIS ADVISORY
--------------------------
None.

WATCHES AND WARNINGS
--------------------
A Tropical Storm Watch remains in effect for Tinian and Saipan.

A Tropical Storm Watch remains in effect for Alamagan, Pagan and
Agrihan Islands in the CNMI.

A Tropical Storm Watch means that tropical storm conditions,
including winds of 39 to 73 mph, are possible within 48 hours.

SUMMARY OF 1100 PM CHST...1300 UTC...INFORMATION
-----------------------------------------------
Location...16.0N 151.0E

About 355 miles east of Saipan
About 355 miles east of Anatahan
About 360 miles east-southeast of Alamagan
About 365 miles east of Tinian
About 375 miles east-southeast of Pagan
About 400 miles east-southeast of Agrihan
About 405 miles east-northeast of Rota
About 450 miles east-northeast of Guam

Maximum sustained winds...35 mph
Present movement...west...280 degrees at 9 mph

DISCUSSION AND OUTLOOK
----------------------
At 11 PM CHST...1300 UTC...the center of Tropical Depression 26W
was located near Latitude 16.0 degrees North and Longitude
151.0 degrees East. 26W is moving west at 9 mph. It is expected
to maintain this general course and speed through Thursday. The
latest forecast track continues to show an intensifying 26W will
pass through the Marianas north of Anatahan on Friday.

Maximum sustained winds remain at 35 mph. 26W is forecast to
intensify through tonight, possibly becoming a tropical storm
either late tonight or early Thursday morning.

NEXT ADVISORY
-------------
The next scheduled advisory will be issued by the National
Weather Service at 200 AM ChST early Thursday morning followed by
an intermediate advisory at 500 AM ChST.

$$

DeCou

Original Message :

WTPQ32 PGUM 301035 CCA
TCPPQ2

BULLETIN...CORRECTED
Tropical Depression 26W Advisory Number 2
National Weather Service Tiyan GU WP262026
835 PM ChST Wed Sep 30 2026

...TROPICAL DEPRESSION TWENTY-SIX CONTINUES WEST TOWARD THE NORTHERN
CNMI...

Corrected time in Summary.

CHANGES WITH THIS ADVISORY
--------------------------
A Tropical Storm Watch is now in effect for Tinian and Saipan.

WATCHES AND WARNINGS
--------------------
A Tropical Storm Watch is now in effect for Tinian and Saipan.

A Tropical Storm Watch remains in effect for Alamagan, Pagan and
Agrihan Islands in the CNMI.

A Tropical Storm Watch means that tropical storm conditions,
including winds of 39 to 73 mph, are possible within 48 hours.

SUMMARY OF 700 PM CHST...0900 UTC...INFORMATION
-----------------------------------------------
Location...15.9N 150.4E

About 315 miles east of Saipan
About 315 miles east of Anatahan
About 325 miles east of Tinian
About 325 miles east-southeast of Alamagan
About 340 miles east-southeast of Pagan
About 365 miles east-northeast of Rota
About 370 miles east-southeast of Agrihan
About 410 miles east-northeast of Guam

Maximum sustained winds...35 mph
Present movement...west...280 degrees at 9 mph

DISCUSSION AND OUTLOOK
----------------------
At 700 PM CHST...0900 UTC...the center of Tropical Depression 26W
was located near Latitude 15.9 degrees North and Longitude
150.4 degrees East. 26W is moving west at 9 mph. It is expected
to make a slight turn toward the west-northwest with a slight
increase in forward speed through Thursday. The latest forecast
track suggests an intensifying 26W will pass through the Marianas
north of Anatahan on Friday.

Maximum sustained winds have increased slightly to 35 mph. 26W is
forecast to intensify through tonight, possibly becoming a
tropical storm either late tonight or early Thursday morning.

NEXT ADVISORY
-------------
An intermediate advisory will be issued by the National Weather
Service at 1100 PM ChST tonight followed by the next scheduled
advisory at 200 AM ChST early Thursday morning.

$$

DeCou

Original Message :

WTPQ32 PGUM 300944
TCPPQ2

BULLETIN
Tropical Depression 26W Advisory Number 2
National Weather Service Tiyan GU WP262026
744 PM ChST Wed Sep 30 2026

...TROPICAL DEPRESSION TWENTY-SIX CONTINUES WEST TOWARD THE NORTHERN
CNMI...

CHANGES WITH THIS ADVISORY
--------------------------
A Tropical Storm Watch is now in effect for Tinian and Saipan.

WATCHES AND WARNINGS
--------------------
A Tropical Storm Watch is now in effect for Tinian and Saipan.

A Tropical Storm Watch remains in effect for Alamagan, Pagan and
Agrihan Islands in the CNMI.

A Tropical Storm Watch means that tropical storm conditions,
including winds of 39 to 73 mph, are possible within 48 hours.

SUMMARY OF 700 PM CHST...0900 UTC...INFORMATION
-----------------------------------------------
Location...15.9N 150.4E

About 315 miles east of Saipan
About 315 miles east of Anatahan
About 325 miles east of Tinian
About 325 miles east-southeast of Alamagan
About 340 miles east-southeast of Pagan
About 365 miles east-northeast of Rota
About 370 miles east-southeast of Agrihan
About 410 miles east-northeast of Guam

Maximum sustained winds...35 mph
Present movement...west...280 degrees at 9 mph

DISCUSSION AND OUTLOOK
----------------------
At 500 PM CHST...0700 UTC...the center of Tropical Depression 26W
was located near Latitude 16.0 degrees North and Longitude
150.8 degrees East. 26W is moving west at 8 mph. It is expected
to make a slight turn toward the west-northwest with a slight
increase in forward speed through Thursday. The latest forecast
track suggests an intensifying 26W will pass through the Marianas
north of Anatahan on Friday.

Maximum sustained winds have increased slightly to 35 mph. 26W is
forecast to intensify through tonight, possibly becoming a
tropical storm either late tonight or early Thursday morning.

NEXT ADVISORY
-------------
An intermediate advisory will be issued by the National Weather
Service at 1100 PM ChST tonight followed by the next scheduled
advisory at 200 AM ChST early Thursday morning.

$$

DeCou

Original Message :

WTPQ32 PGUM 300728
TCPPQ2

BULLETIN
Tropical Depression 26W Intermediate Advisory Number 1A
National Weather Service Tiyan GU WP262026
528 PM ChST Wed Sep 30 2026

...TROPICAL DEPRESSION TWENTY-SIX MOVING WEST TOWARD THE NORTHERN
CNMI...

CHANGES WITH THIS ADVISORY
--------------------------
None.

WATCHES AND WARNINGS
--------------------
A Tropical Storm Watch remains in effect for Alamagan, Pagan and
Agrihan Islands in the CNMI.

A Tropical Storm Watch means that tropical storm conditions,
including winds of 39 to 73 mph, are possible within 48 hours.

Residents of Saipan and Tinian should carefully monitor the
progress of Tropical Depression 26W.

SUMMARY OF 500 PM CHST...0700 UTC...INFORMATION
-----------------------------------------------
Location...16.0N 150.8E

About 340 miles east of Saipan
About 340 miles east of Anatahan
About 345 miles east-southeast of Alamagan
About 350 miles east-northeast of Tinian
About 365 miles east-southeast of Pagan
About 390 miles east-northeast of Rota
About 390 miles east-southeast of Agrihan
About 435 miles east-northeast of Guam

Maximum sustained winds...30 mph
Present movement...west...270 degrees at 8 mph

DISCUSSION AND OUTLOOK
----------------------
At 500 PM CHST...0700 UTC...the center of Tropical Depression 26W
was located near Latitude 16.0 degrees North and Longitude
150.8 degrees East. 26W is moving west at 8 mph. It is expected
to make a slight turn toward the west-northwest with a slight
increase in forward speed through Thursday. The latest forecast
track suggests an intensifying 26W will pass through the Marianas
north of Anatahan on Friday.

Maximum sustained winds remain at 30 mph. 26W is forecast to
intensify through tonight, possibly becoming a tropical storm
Thursday morning.

NEXT ADVISORY
-------------
The next scheduled advisory will be issued by the National
Weather Service at 800 PM ChST this evening followed by an
intermediate advisory at 1100 PM ChST tonight.

$$

DeCou

Original Message :

WTPQ32 PGUM 300330
TCPPQ2

BULLETIN
Tropical Depression 26W Advisory Number 1
National Weather Service Tiyan GU WP262026
130 PM ChST Wed Sep 30 2026

...TROPICAL DEPRESSION 26W FORMS EAST OF SAIPAN...

CHANGES WITH THIS ADVISORY
--------------------------
A Tropical Storm Watch is now in effect for Alamagan, Pagan and
Agrihan.

WATCHES AND WARNINGS
--------------------
A Tropical Storm Watch is now in effect for Alamagan, Pagan and
Agrihan islands in the CNMI.

A Tropical Storm Watch means that tropical storm conditions,
including winds of 39 to 73 mph, are possible within 48 hours.

Residents of Saipan and Tinian should carefully monitor the
progress of Tropical Depression 26W.

SUMMARY OF 100 PM CHST...0300 UTC...INFORMATION
-----------------------------------------------
Location...15.7N 151.6E

About 395 miles east of Saipan
About 395 miles east of Anatahan
About 400 miles east of Tinian
About 405 miles east-southeast of Alamagan
About 420 miles east-southeast of Pagan
About 435 miles east-northeast of Rota
About 445 miles east-southeast of Agrihan
About 480 miles east-northeast of Guam

Maximum sustained winds...30 mph
Present movement...west...270 degrees at 8 mph

DISCUSSION AND OUTLOOK
----------------------
At 100 PM CHST...0300 UTC...the center of Tropical Depression 26W
was located near Latitude 15.7 degrees North and Longitude 151.6
degrees East. 26W is moving west at 8 mph. It is expected to make a
slight turn toward the west-northwest with a slight increase in
forward speed through Thursday. The latest forecast track suggests an
intensifying 26W will pass through the Marianas north of Anatahan on
Friday.

Maximum sustained winds are 30 mph. 26W is forecast to intensify
through tonight, possibly becoming a tropical storm Thursday morning.

NEXT ADVISORY
-------------
An intermediate advisory will be issued by the National Weather
Service at 500 PM ChST followed by the next scheduled advisory at 800
PM ChST.

$$

Mesa/W. Aydlett

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