Headline:
Flash Flood Warning issued October 18 at 3:23AM ChST until October 18 at 5:30AM ChST by NWS Tiyan GU
Event:
Flash Flood Warning
Urgency:
Immediate
Effective:
October 17, 2026 - 10:23am
Expires:
October 17, 2026 - 12:30pm
Description:
FFWGUM
The National Weather Service in Tiyan has extended the
* Flash Flood Warning for...
Guam...
* Until 530 AM ChST.
* At 323 AM ChST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area with the inner eyewall of Champi
approaching southern Guam. Between 2 and 4 inches of rain have
fallen. Flash flooding is ongoing or expected to begin shortly and
will last through Sunday morning.
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...
Dededo, Tamuning, Yigo, Mangilao, Chalan Pago-Ordot, Barrigada,
Yona, Hagatna Heights, Andersen AFB, Talofofo, Mongmong-Toto-Maite,
Sinajana, Inarajan, Asan, Merizo, Piti, Santa Rita and Umatac.
Instruction:
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.
Area Description:
Guam, GU
Forcast Office:
NWS Tiyan GU
Sender:
w-nws.webmaster@noaa.gov