Guam Severe Flash Flood Warning | Effective 09/06/2026 02:15

Headline: 
Flash Flood Warning issued September 6 at 7:15PM ChST until September 6 at 8:45PM ChST by NWS Tiyan GU
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
September 6, 2026 - 2:15am
Expires: 
September 6, 2026 - 3:45am
Description: 
FFWGUM The National Weather Service in Tiyan has issued a * Flash Flood Warning for... Southwestern Guam... * Until 845 PM ChST. * At 715 PM ChST, Doppler radar indicated heavy showers, with the potential for thunderstorms, producing heavy rain across the warned area. Between 2 and 3 inches of rain have fallen. Additional rainfall amounts of 1 to 3 inches are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by heavy showers and possible thunderstorms. SOURCE...Radar indicated. IMPACT...Flash flooding of small creeks and streams, urban areas, highways and streets, as well as other poor drainage and low-lying areas.
Instruction: 
Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be aware of your surroundings and do not drive on flooded roads. Report flooding to law enforcement. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.
Area Description: 
Guam, GU
Forcast Office: 
NWS Tiyan GU
Sender: 
w-nws.webmaster@noaa.gov