Severe Hurricane / Cyclone / Typhoon ● Closed

Tropical Storm Warning issued October 1 at 9:10AM ChST by NWS Tiyan GU, United States of America

Event time: Last updated: Oct 9, 2026 United States
Icon = what happened · ring colour = how serious: Extreme Severe Moderate Minor

Loading live data… · Marker positions are approximate; severity is labelled in each popup. Sources: USGS, GDACS, NASA EONET, NOAA/NWS, EMSC.

...NEWLY NAMED TROPICAL STORM CHOI-WAN CONTINUES MOVING WEST-
NORTHWEST TOWARDS THE FAR NORTHERN MARIANAS...

.NEW INFORMATION...
Tropical Storm 26W is now named Choi-wan.
A Tropical Storm Warning is now in effect for Tinian and Saipan and
their adjacent waters in the CNMI.

.AREAS AFFECTED...
This local statement provides important information and recommended
actions for people in Guam and the Northern Marianas.

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

A Flash 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.

All persons in the Watch areas should review their preparedness plan
and begin to take actions to prepare for conditions as indicated by
your local forecast and additional details, below, for your island.

.STORM INFORMATION...
At 7 AM ChST, the center of Tropical Storm Choi-wan (26W) was located
near latitude 16.3N, longitude 149.5E. This was about 370 miles
east-northeast of Guam. Storm motion was west-northwest, 285 degrees,
at 9 mph. Storm intensity was 40 mph.

.SITUATION OVERVIEW...
Tropical Storm Choi-wan (26W) has increased in forward speed once
again, with a slight expansion in the tropical storm-force wind field
expected to the west and southwest, keeping Tinian and Saipan well
within said wind field. As such, the Tropical Storm Watch was
upgraded to Tropical Storm

Measurements

Coordinates39.9645, -100.8105
RegionTinian; Saipan
Location Precisioncountry
Issuing AuthorityUnited States of America — us-noaa-nws-en
Cap UrgencyImmediate
Cap CertaintyLikely
Cap Expires2026-10-01T15:00:00+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 18 days ago (Sep 30, 2026 23:12 UTC) · we last heard from WMO Alert Hub (national weather services) 48 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

Follow the instructions issued by WMO Alert Hub (national weather services) and your local emergency services. The guidance below is background.

Preparing for hurricane season, understanding watches vs warnings, storm surge evacuation, and riding out the storm safely.

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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 — East Cameron Severe Hurricane / Cyclone / Typhoon United States closed via NWS Aug 31, 2026 Tropical Storm Warning — West Cameron Severe Hurricane / Cyclone / Typhoon United States closed via NWS Aug 31, 2026 Tropical Storm Warning — Lower Vermilion Severe Hurricane / Cyclone / Typhoon United States closed via NWS Aug 31, 2026 Tropical Storm Warning — Lower Jefferson Severe Hurricane / Cyclone / Typhoon United States closed via NWS Aug 31, 2026

Nearby & related events

Wind Advisory issued October 19 at 1:35PM AKDT until October 20 at 10:00PM AKDT by NWS Juneau AK, United States of America Moderate Severe Storm United States active via WMO 26 min ago Wind Advisory issued October 19 at 1:35PM AKDT until October 21 at 4:00PM AKDT by NWS Juneau AK, United States of America Moderate Severe Storm United States active via WMO 26 min ago Wind Advisory issued October 19 at 1:35PM AKDT until October 21 at 4:00AM AKDT by NWS Juneau AK, United States of America Moderate Severe Storm United States active via WMO 26 min ago Winter Weather Advisory issued October 19 at 1:34PM AKDT until October 21 at 4:00AM AKDT by NWS Anchorage AK, United States of America Moderate Cold Wave United States active via WMO 27 min ago Winter Weather Advisory issued October 19 at 1:34PM AKDT until October 20 at 10:00PM AKDT by NWS Anchorage AK, United States of America Moderate Cold Wave United States active via WMO 27 min ago

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.