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SPC watches: Feed current; checked 11:00Z.

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1 active flash flood warning

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Emergencies first, then NWS’s own order: tsunamis, tornadoes on the ground, tornadoes indicated by radar, extreme winds, destructive and severe thunderstorms, flash floods, and on down to red flag warnings; within each, the one that ends soonest.

Flash flood 1

Flash Flood Warning6 h 29 min leftGuam County, GUUntil 17:30ZFlash flood radar indicated, selected

69 other warnings are hidden by the flash flood filter. Show all hazards

Warning details

Flash Flood Warning

Guam County, GU

Until 17:30Z 6 h 29 min left

What NWS says to do · Data: NOAA/NWS

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.

Detection: Flash flood radar indicated
Source: NWS Tiyan GU
Issued: 09:28Z
Updated: 09:28Z
Identifier: PGUM.FF.W.0036

Full NWS bulletin · Data: NOAA/NWS

Flash Flood Warning issued October 17 at 7:28PM ChST until October 18 at 3:30AM ChST by NWS Tiyan GU

FFWGUM

The National Weather Service in Tiyan has issued a

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

* Until 330 AM ChST Sunday.

* At 728 PM ChST, Doppler radar indicated heavy rain across the
warned area. Between 1 and 2 inches of rain have fallen and
torrential rain will continue through the night. 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...
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.

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.

In the Briefing

Flash flood warning
Typhoon warning
High wind warning
Tropical storm warning
Flood warning
Coastal flood warning
High surf warning
Freeze warning
Red flag warning
Tornado watch
Severe thunderstorm watch
Mesoscale discussion

No radar on this map: the interactive map needs script and WebGL. Warnings, watches and discussions are drawn from the same list.

SPC context Watches 0 national Discussions 0 national Day 1 outlook General Thunderstorms Risk national maximum Reports 33 today, national

Watches national

No tornado or severe thunderstorm watch is in force.

Mesoscale discussions national

No mesoscale discussion is in force.

Day 1 outlook national

Day 1 national maximum: General Thunderstorms, no severe risk outlined

The highest category anywhere in the country. The map’s SPC Day 1 layer shows where each category lies.

Storm reports today, national

0 tornado, 33 wind, 0 hail today, nationally. The map’s Storm reports layer shows where.

Data: NOAA/NWS · NOAA/SPC Not an official warning service.

About this data

Not an official warning service. Warnings and watches are drawn from the National Weather Service, and discussions, outlooks and reports from its Storm Prediction Center (Data: NOAA/NWS, NOAA/SPC). When a warning is issued for you, act on it — and use weather.gov or a NOAA Weather Radio for where you are.

Radar: NOAA MRMS mosaic via nowCOAST, drawn live with no last-good copy: an empty radar means we cannot see, not that the sky is clear. Warnings and watches: NOAA/NWS. Discussions, outlook and reports: NOAA/SPC. The maps are ours; the warnings are theirs.

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