Guam, Northern Mariana Islands Severe Flash Flood Warning | Effective 07/05/2026 23:21

Headline: 
Flash Flood Warning issued July 6 at 4:21PM ChST until July 6 at 6:15PM ChST by NWS Tiyan GU
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
July 5, 2026 - 11:21pm
Expires: 
July 6, 2026 - 1:15am
Description: 
FFWGUM The National Weather Service in Tiyan has issued a * Flash Flood Warning for... Guam... Rota... * Until 615 PM ChST. * At 421 PM ChST, satellite estimates indicate heavy rain across the warned area. Flash flooding is already occurring. HAZARD...Flash flooding caused by heavy rain. SOURCE...Satellite estimates. 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