NWS Tiyan GUFF.W 0025August 26, 2026
Flash Flood Warning: Guam County, GU
The National Weather Service office in Tiyan issued a flash flood warning for Guam County in Guam, which was in force until 8:30 a.m. local time on August 26. It was the 25th flash flood warning the NWS office in Tiyan issued in 2026.
ExpiredWarning
Issued6:57 a.m. UTC+10, August 26, 2026
In force6:57 a.m. UTC+10, August 26, 2026
Expired8:30 a.m. UTC+10, August 26, 2026
In force for 1.6 hours; it has expired. The agency may have replaced it with a new notice.
The notice
- Issued by
- National Weather Service, Tiyan GU
- Area
- Guam County
- State
- Guam
- Level
- Warning
- Issued
- 6:57 a.m. UTC+10, August 26, 2026
- Expires
- 8:30 a.m. UTC+10, August 26, 2026
- CAP severity, certainty, urgency
- Severe, Likely, Immediate
- VTEC event
- PGUM FF.W 0025
- Official source
- National Weather Service: the notice at its source
Source: National Weather Service: the notice at its source. AreaZine rebuilds this page from the agency's record; the agency's page is the one to act on. A U.S. Government work, in the public domain.
The notice as issued
FFWGUM The National Weather Service in Tiyan has issued a * Flash Flood Warning for... Southwestern Guam... * Until 830 AM ChST. * At 657 AM ChST, Doppler radar indicated thunderstorms producing heavy rain across the warned area. Between 2 and 5 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 thunderstorms. 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... Mangilao, Chalan Pago-Ordot, Yona, Talofofo, Inarajan, Merizo, Piti, Santa Rita and Umatac.
What the agency told people to do
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.
Source: National Weather Service: the notice at its source. The text is the agency's, unedited. A U.S. Government work, in the public domain.