Severe Hurricane / Cyclone / Typhoon ● Closed
Tropical Storm Warning issued October 1 at 7:59PM ChST by NWS Tiyan GU, United States of America
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* WHAT...Southwest winds 25 to 35 kt with gusts up to 55 kt and
seas 11 to 16 feet.
* WHERE...Tinian Coastal Waters and Saipan Coastal Waters.
* WHEN...Until further notice.
* IMPACTS...Very strong winds will cause hazardous seas which
could capsize or damage vessels and reduce visibility.
* ADDITIONAL DETAILS...Tropical Storm Choi-wan (26W) continues to
develop as it moves westward towards Anatahan and Alamagan.
Tropical storm force winds may expand southward over Saipan and
Tinian tonight. Seas will remain hazardous to small craft until
further notice and could become hazardous by late tonight.
Measurements
| Coordinates | 39.9645, -100.8105 |
|---|---|
| Region | Tinian Coastal Waters; Saipan Coastal Waters |
| Location Precision | country |
| Issuing Authority | United States of America — us-noaa-nws-en-marine |
| Cap Urgency | Immediate |
| Cap Certainty | Likely |
| Cap Expires | 2026-10-02T10:00:00+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 reportThis event as JSON · API and licence
Source updated 18 days ago (Oct 1, 2026 10:00 UTC) · we last heard from WMO Alert Hub (national weather services) 27 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 Coastal Waters; Saipan Coastal Waters
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.
More for United States →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.
Open Hurricane Safety Guide →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.
Nearby & related events
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.