Severe Tropical Storm Watch | Effective 08/20/2026 11:11

Headline: 
Tropical Storm Watch issued August 21 at 4:11AM ChST by NWS Tiyan GU
Event: 
Tropical Storm Watch
Urgency: 
Future
Effective: 
August 20, 2026 - 11:11am
Expires: 
August 21, 2026 - 1:15am
Description: 
* WHAT...Tropical storm conditions possible. * WHERE...Tinian and Saipan Coastal Waters. * WHEN...Beginning late tonight. * IMPACTS...Very strong winds will cause hazardous seas which could capsize or damage vessels and reduce visibility. * ADDITIONAL DETAILS...Tropical Storm Saudel (17W) is making its approach toward the Marianas, with a storm track across the far northern Marianas.
Instruction: 
A tropical storm watch means sustained winds of 34 to 63 kt or 39 to 73 mph are possible due to a tropical storm within 48 hours.
Area Description: 
Tinian Coastal Waters; Saipan Coastal Waters
Forcast Office: 
NWS Tiyan GU
Sender: 
w-nws.webmaster@noaa.gov