Severe Tropical Storm Warning | Effective 10/01/2026 09:57

Headline: 
Tropical Storm Warning issued October 2 at 2:57AM ChST by NWS Tiyan GU
Event: 
Tropical Storm Warning
Urgency: 
Immediate
Effective: 
October 1, 2026 - 9:57am
Expires: 
October 2, 2026 - 12:00am
Description: 
* WHAT...Southwest winds 25 to 40 kt with gusts to 55 kt and seas 14 to 20 feet. * WHERE...Tinian 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 across the northern Marianas south of Alamagan, with Tropical storm force winds already being felt over Saipan early this morning. Hazardous seas will continue.
Instruction: 
A tropical storm warning means sustained winds of 34 to 63 kt are expected due to a tropical storm within 36 hours.
Area Description: 
Tinian Coastal Waters; Saipan Coastal Waters
Forcast Office: 
NWS Tiyan GU
Sender: 
w-nws.webmaster@noaa.gov