Severe · Flash Flood WarningActive alert

Flash Flood Warning issued October 17 at 9:23PM ChST until October 18

Affecting Guam, GU

In effect until: Oct 17, 2026, 5:30 PM

Guam, GU

Likely impact in Guam, GU; effects through 5:30 PM.

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles. Be especially cautious at night when it is harder to recognize the dangers of flooding.

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Read the original bulletin (official text)

At 923 PM ChST, Doppler radar indicated heavy rain across the warned
area. Between 1 and 2 inches of rain have fallen. Torrential rain
will continue through the night. TY Champi is anticipated to bring 8
to 14 inches of rain as it passes. Flash flooding is ongoing or
expected to begin shortly.

HAZARD...Flash flooding caused by heavy rain.

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...
Guam

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

Flash Flood Warning issued October 17 at 9:23PM ChST until October 18

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