NOAA NWS / CAPTURE HISTORY

Flash Flood Warning issued October 10 at 11:30AM ChST until October 10 at 12:30PM ChST by NWS Tiyan GU

Latest captured source record. This is an archive, not a current warning service.

First tracked: 2026-10-10 01:44:51.120Z
Last seen in a feed: 2026-10-10 02:14:53.032Z
Source classification: Severe · Source alert
Issuer / area: NWS Tiyan GU · Guam, GU
Certainty / urgency: Likely / Immediate
Message expiry (not hazard end): 2026-10-10T02:30:00.000Z
Forecast onset / end: 2026-10-10T01:30:00.000Z / 2026-10-10T02:30:00.000Z

Flash Flood Warning · Guam, GU. Severe; likely; urgency: immediate.

Archived official description

FFWGUM The National Weather Service in Tiyan has issued a * Flash Flood Warning for... Central Guam... * Until 1230 PM ChST. * At 1130 AM ChST, trained weather spotters reported heavy rain across the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Flash flooding caused by heavy rain. SOURCE...Off-duty NWS Employee reported. 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, Hagatna Heights, Mongmong-Toto-Maite, Sinajana and Asan.

Instructions in this archived message

Turn around, don't drown when encountering flooded roads. Most flood deaths occur in vehicles.

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How the record changed

Only changes captured by this journal are listed; this is not the authority’s complete history. Timestamps distinguish publication from our capture. Missing messages are never treated as cancellations.

newly tracked · Captured 2026-10-10 01:44:51.120Z
Flash Flood Warning issued October 10 at 11:30AM ChST until October 10 at 12:30PM ChST by NWS Tiyan GU
Flash Flood Warning · Guam, GU. Severe; likely; urgency: immediate.
Source issued/updated 2026-10-10T01:30:00.000Z · Source alert
Source for this capture ↗