Severe · Flash Flood WarningThis alert has expired. It is kept for reference.

Flash Flood Warning issued September 9 at 3:02PM ChST until September 9

Affecting Guam, GU

In effect until: Sep 9, 2026, 6:30 AM

Guam, GU

Likely impact in Guam, GU; effects through 6:30 AM.

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.

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FFWGUM

The National Weather Service in Tiyan has issued a

* Flash Flood Warning for...
Central Guam...

* Until 430 PM ChST.

* At 302 PM ChST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1.0 and 2.0 inches of
rain have fallen. Additional rainfall amounts of 0.5 to 1.5 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, and streets as well as other poor drainage and
low-lying areas.

* Some locations that will experience flash flooding include...
Mangilao, Chalan Pago-Ordot, Barrigada, Yona, Talofofo,
Mongmong-Toto-Maite, Sinajana and Santa Rita.

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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™

Flash Flood Warning issued September 9 at 3:02PM ChST until September 9

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