Guam Severe Flash Flood Warning | Effective 10/01/2026 17:43

Headline: 
Flash Flood Warning issued October 2 at 10:43AM ChST until October 2 at 11:00AM ChST by NWS Tiyan GU
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
October 1, 2026 - 5:43pm
Expires: 
October 1, 2026 - 6:00pm
Description: 
FFWGUM The National Weather Service in Tiyan has extended the * Flash Flood Warning for... Southwestern Guam... * Until 1100 AM ChST. * At 1043 AM ChST, Doppler radar indicated heavy rain across the warned area. Between 1.2 and 2 inches of rain have fallen. Additional rainfall amounts of 0.4 to 0.8 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by heavy rain. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, streets and underpasses as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Talofofo, Inarajan, Merizo and Umatac.
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Move to higher ground now. Act quickly to protect your life. Be aware of your surroundings and do not drive on flooded roads.
Area Description: 
Guam, GU
Forcast Office: 
NWS Tiyan GU
Sender: 
w-nws.webmaster@noaa.gov