Guam, Northern Mariana Islands Flood Watch | Effective 04/11/2026 14:20

Headline: 
Flood Watch issued April 12 at 7:20AM ChST until April 15 at 10:00AM ChST by NWS Tiyan GU
Event: 
Flood Watch
Urgency: 
Future
Effective: 
April 11, 2026 - 2:20pm
Expires: 
April 12, 2026 - 2:30am
Description: 
* WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Guam, Rota, Saipan and Tinian. * WHEN...From 6 PM ChST this evening through Wednesday morning. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. * ADDITIONAL DETAILS... - Typhoon Sinlaku is expected to approach the Marianas, and could drop as much as 20 inches of rain between Monday and Wednesday. - http://www.weather.gov/safety/flood
Instruction: 
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Area Description: 
Guam; Rota; Tinian; Saipan
Forcast Office: 
NWS Tiyan GU
Sender: 
w-nws.webmaster@noaa.gov