Tropical Storm Warning issued October 2 at 3:34AM ChST…

Tropical Storm Warning issued October 2 at 3:34AM ChST by NWS Tiyan GU, United States of America

Event time: Oct 1, 2026 17:34 UTC Last updated: Oct 10, 2026 United States

Icon = what happened · ring colour = how serious: Extreme Severe Moderate Minor

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...TROPICAL STORM CHOI-WAN MOVING WEST THROUGH THE NORTHERN
MARIANAS, SOUTH OF ALAMAGAN...

.NEW INFORMATION...
None.

.AREAS AFFECTED...
This local statement provides information and recommended actions
for people on Saipan, Tinian, Agrihan, Pagan and Alamagan in the
Commonwealth of the Northern Marianas.

.WATCHES/WARNINGS...
A Tropical Storm Warning remains in effect for Tinian, Saipan, and
adjacent coastal waters.

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

A Typhoon Watch remains in effect for Alamagan, Pagan, and Agrihan
in the CNMI.

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.

A Flood Watch remains in effect for Tinian and Saipan. Please listen
closely for any Flash Flood Warnings that might be in effect for
your area.

Please check the latest public and marine forecasts for detailed
information about additional hazards.

.STORM INFORMATION...
At 2 AM ChST...the center of Tropical Storm Choi-wan (26W) was
located near latitude 16.6N...longitude 145.5E. This was about
75 miles south of Alamagan, 105 miles north of Saipan, 105 miles
south of Pagan, and 220 miles north-northeast of Guam. Storm
motion was west, 260 degrees, at 12 mph. Storm intensity was 60
mph.

.SITUATION OVERVIEW...
Tropical Storm Choi-Wan is expected to slow slightly as it
continues westward early this morning, passing to the south of
Alamagan. Choi-wan is then expected to make a turn toward the
northwest, then north with a decrease in forward speed through
Friday. Then, Choi-wan looks to gradually turn to the north-
northeast late Friday night through Saturday after it emerges west
of the northern islands. Choi-wan is forecast to intensify
through Saturday, potentially becoming a typhoon Friday afternoon
or evening.

This forecasted track moving roughly along the axis of the far
northern

Measurements

Coordinates	39.9645, -100.8105
Region	Tinian; Saipan
Location Precision	country
Issuing Authority	United States of America — us-noaa-nws-en
Cap Urgency	Immediate
Cap Certainty	Likely
Cap Expires	2026-10-02T11:45:00+10:00

Official source

Warnings courtesy of the issuing national meteorological service, via the WMO Alert Hub.

This is an official warning issued by the authority named above. Follow its instructions and those of your local emergency services.

Severity as published by WMO Alert Hub (national weather services).

View original report

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Source updated 18 days ago (Oct 1, 2026 17:35 UTC) · we last heard from WMO Alert Hub (national weather services) 23 seconds ago

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About this location

The agency did not publish coordinates for this warning. The pin is the centre of the country, not the location of the event — read the area name, not the map, for where it applies.

Area as the agency stated it: Tinian; Saipan

Official authorities in United States

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