Overall Green Tropical Cyclone for TWENTYSIX-26 in Northern Mariana Islands from 30 Sep 2026 00:00 UTC to 06:00

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve awareness, information exchange and coordination in the first phase after major sudden-onset disasters.

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 09:45 WTPQ32PGUM300944

30/09 07:29 WTPQ32PGUM300728

30/09 03:32 WTPQ32PGUM300330

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

Disclaimer - Copyright
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
The JRC is not responsible for any damage or loss resulting from the use of the information presented on this website.
The designations employed and the presentation of material on the map do not imply the expression of any opinion whatsoever on the part of the European Union concerning the legal status of any country, territory or area or of its authorities, or concerning the delimitation of its frontiers or boundaries.