Guam, Northern Mariana Islands Severe Flash Flood Warning | Effective 07/05/2026 17:03

Headline: 
Flash Flood Warning issued July 6 at 10:03AM ChST until July 6 at 12:15PM ChST by NWS Tiyan GU
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
July 5, 2026 - 5:03pm
Expires: 
July 5, 2026 - 7:15pm
Description: 
FFWGUM The National Weather Service in Tiyan has extended the * Flash Flood Warning for... Guam... Rota... * Until 1215 PM ChST. * At 1003 AM ChST, Doppler radar and automated rain gauges indicated heavy rain falling across the warned area. Flash flooding is already occurring. HAZARD...Flash flooding caused by heavy rain. SOURCE...Radar and automated gauges. IMPACT...Flash flooding of small creeks and streams, urban areas, highways, and streets as well as other poor drainage and low-lying areas. * Some locations that will experience flash flooding include... Dededo, Tamuning, Yigo, Mangilao, Chalan Pago-Ordot, Barrigada, Yona, Hagatna Heights, Andersen AFB, Talofofo, Mongmong-Toto-Maite, Sinajana, Inarajan, Asan, Merizo, Piti, Santa Rita, Umatac, Sinapalo and Songsong.
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. Stay away or be swept away. River banks and culverts can become unstable and unsafe.
Area Description: 
Guam, GU; Rota, MP
Forcast Office: 
NWS Tiyan GU