Guam, Northern Mariana Islands Severe Flood Watch | Effective 10/16/2026 12:01

Headline: 
Flood Watch issued October 17 at 5:01AM ChST until October 18 at 4:00PM ChST by NWS Tiyan GU
Event: 
Flood Watch
Urgency: 
Future
Effective: 
October 16, 2026 - 12:01pm
Expires: 
October 17, 2026 - 1:30am
Description: 
* WHAT...Flooding caused by excessive rainfall continues to be possible. * WHERE...Guam, Rota, Saipan and Tinian. * WHEN...Through Sunday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. Storm drains and ditches may become clogged with debris. Extensive street flooding and flooding of creeks and rivers are possible. * ADDITIONAL DETAILS... - Tropical Storm Champi (29W) will drop copious amounts of rain over Sunday and Monday...although an unexpected southward shift in track will reduce these somewhat. Tinian and Saipan will see around 4 to 6 inches, Rota could receive 10 to 15 inches, and Guam might get 12 to 20 inches. - 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