Guam, Northern Mariana Islands Flash Flood Warning | Effective 04/14/2026 14:28

Headline: 
Flash Flood Warning issued April 15 at 7:28AM ChST until April 15 at 8:30AM ChST by NWS Tiyan GU
Event: 
Flash Flood Warning
Urgency: 
Immediate
Effective: 
April 14, 2026 - 2:28pm
Expires: 
April 14, 2026 - 3:30pm
Description: 
FFWGUM The National Weather Service in Tiyan has extended the * Flash Flood Warning for... Guam... Rota... * Until 830 AM ChST. * At 728 AM ChST, trained weather spotters reported heavy rain across the warned area. Between 4 and 10 inches of rain have fallen. The expected rainfall rate is 1 to 2 inches in 1 hour. Additional rainfall amounts of 2 to 4 inches are possible in the warned area. Flash flooding is already occurring. HAZARD...Flash flooding caused by heavy rain. SOURCE...Trained spotters reported. IMPACT...Flash flooding of small creeks and streams, urban areas, 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.
Area Description: 
Guam, GU; Rota, MP
Forcast Office: 
NWS Tiyan GU