Guam Minor Flood Advisory | Effective 08/25/2026 13:23

Headline: 
Flood Advisory issued August 26 at 6:23AM ChST until August 26 at 7:30AM ChST by NWS Tiyan GU
Event: 
Flood Advisory
Urgency: 
Expected
Effective: 
August 25, 2026 - 1:23pm
Expires: 
August 25, 2026 - 2:30pm
Description: 
* WHAT...Urban area and small stream flooding caused by excessive rainfall is expected. * WHERE...Southern Guam... * WHEN...Until 730 AM ChST. * IMPACTS...Minor flooding in low-lying and poor drainage areas. Overflowing poor drainage areas. Some low-water crossings may become impassable. * ADDITIONAL DETAILS... - At 623 AM ChST, Doppler radar indicated heavy rain due to thunderstorms. This will cause urban and small stream flooding. - Some locations that will experience flooding include... Mangilao, Chalan Pago-Ordot, Barrigada, Yona, Hagatna Heights, Talofofo, Mongmong-Toto-Maite, Sinajana, Inarajan, Asan, Merizo, Piti, Santa Rita and Umatac. - http://www.weather.gov/safety/flood
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.
Area Description: 
Guam, GU
Forcast Office: 
NWS Tiyan GU
Sender: 
w-nws.webmaster@noaa.gov