# Flash Flood Warning: Guam, GU — retained record

> Retained us-gov-api record from us-gov-api:noaa-weather.

Canonical: https://highsignal.app/data/records/02ccf228e3e2f0a0

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source: [us-gov-api](https://highsignal.app/data/us-gov-api) (us-gov-api:noaa-weather)  published 2026-08-19 15:44 ingested 2026-08-19 06:40

[original source ↗](http://www.weather.gov/)

## extract

Flash Flood Warning — Guam, GU
Severity: Severe. Certainty: Likely.
FFWGUM

The National Weather Service in Tiyan has extended the

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

* Until 500 PM ChST.

* At 344 PM ChST, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 2.2 and 3.4 inches of
rain have fallen. 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...
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.

Heavy rains from earlier have eased, but stratiform rain will
continue for at least the next hour as roads remain flooded,
especially in the Hagatna area and potentially parts of southern
Guam.

## retained text

The historical document was shared with another weather alert and cannot be attributed to this record. The original extract is preserved above; the exact alert link was not retained.