Flash Flood Warning for Guam, GU
Official alert fields
What you need to know
- Applies to
- Guam
- Effective
- Ends or expires
- Official severity
- Severe
- Official urgency
- Immediate
- Official certainty
- Likely
What is happening
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...
What the bulletin says to do
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. Please report observed flooding to local emergency services or law enforcement and request they pass this information to the National Weather Service when you can do so safely.
Full official description
Bulletin details
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.
Official geometry where available
Alert boundary
Lifecycle record
Official revisions
- Update
Flash Flood Warning issued August 19 at 3:44PM ChST until August 19 at 5:00PM ChST by NWS Tiyan GU
Official revision - Alert
Flash Flood Warning issued August 19 at 3:05PM ChST until August 19 at 4:00PM ChST by NWS Tiyan GU
Official revision
Source and limitations
Publisher: Weather Alert Watch. Primary source: NWS Tiyan GU. This page reorganizes official fields and does not add a forecast or expand the affected area.
- CAP status
- Actual
- Message type
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- Last collected