Severe Hurricane / Cyclone / Typhoon ● Closed

Tropical Storm Warning issued October 2 at 8:21AM ChST by NWS Tiyan GU, United States of America

Event time: 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-NORTHWEST AND AWAY FROM
ANATAHAN...

.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 Saipan, Tinian and
their adjacent coastal waters, as well as 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 7 AM ChST, the center of Tropical Storm Choi-wan (26W) was located
near latitude 17.0N and longitude 144.9E. This was about 140 miles
north-northwest of Saipan. Storm motion was west-northwest, 285
degrees, at 9 mph. Storm intensity was 60 mph. It is expected to
make a turn toward the north with a slight decrease in forward speed
through Saturday as it moves nearly parallel to the Mariana chain
once it becomes a typhoon sometime this afternoon.

.SITUATION OVERVIEW...
Tropical Storm Choi-wan has recently passed Anatahan, with the center
around 70 miles to the northwest. Choi-Wan is expected to slow
slightly as it continues westward, gradually turning to the north-
northeast late tonight through Saturday. As Choi-wan pivots, the
wind field will continue to expand, bringing other islands such as
Guam and Rota under occasionally near-gale winds during peak
conditions later this afternoon, as multiple rainbands continue to
drag south. Meanwhile Saipan and Tinian ma

Measurements

Coordinates39.9645, -100.8105
RegionTinian; Saipan
Location Precisioncountry
Issuing AuthorityUnited States of America — us-noaa-nws-en
Cap UrgencyImmediate
Cap CertaintyLikely
Cap Expires2026-10-02T15:00:00+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

This event as JSON · API and licence

Source updated 17 days ago (Oct 1, 2026 22:22 UTC) · we last heard from WMO Alert Hub (national weather services) 46 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

If you are there, these are the bodies whose instructions apply. This site is not an emergency service and does not issue warnings.

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What to do

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Earlier hurricane / cyclone / typhoon events in United States

Severe and extreme events of the same kind, before this one. Listed for scale, not because they are connected to it.

Tropical Storm Warning — Southern Calcasieu Severe Hurricane / Cyclone / Typhoon United States closed via NWS Sep 1, 2026 Tropical Storm Warning — East Cameron Severe Hurricane / Cyclone / Typhoon United States closed via NWS Sep 1, 2026 Tropical Storm Warning — Southern Newton Severe Hurricane / Cyclone / Typhoon United States closed via NWS Sep 1, 2026 Tropical Storm Warning — Lower Jefferson Severe Hurricane / Cyclone / Typhoon United States closed via NWS Sep 1, 2026

Nearby & related events

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Disclaimer: figures are automatic feeds from the named agencies and may be revised. Do not use this page for life-safety decisions — follow official local emergency services.