Flash Flood Warning 8, NWS Guam

Issued

Oct 5, 2021, 7:34 AM CDT (12:34 UTC)

Expired

Oct 5, 2021, 10:30 AM CDT

In force

3 hr

Issued by

NWS Guam

Area

Storm-based polygon

Flood severity

None

The Andersen AFB radar (PGUA), 7 km from the middle of the area, began a volume at 12:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

645 
WGMY50 PGUM 051234
FFWGUM
GUC010-051530-
/O.NEW.PGUM.FF.W.0008.211005T1234Z-211005T1530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Tiyan GU
1034 PM ChST Tue Oct 5 2021

The National Weather Service in Tiyan has issued a

* Flash Flood Warning for...
  Guam Island in the Marianas...

* Until 130 AM ChST.

* At 1034 PM ChST, Doppler radar and automated rain gauges indicated 
  heavy rain falling across the warned area. Between 1 and 2 inches 
  of rain have fallen. Additional rainfall amounts of 2 to 4 inches 
  are possible in the warned area. Flash flooding is ongoing or 
  expected to begin shortly.

  HAZARD...Flash flooding caused by heavy rain.

  SOURCE...Radar and automated gauges.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, streets and underpasses as well as other poor
           drainage and low-lying areas.

* Northern Guam, north of Barrigada. Heaviest rainfall is likely 
  over Dededo, Yigo and Andersen AFB.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

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.

&&

LAT...LON 1350 14477 1351 14480 1353 14480 1359 14483
      1362 14483 1365 14485 1365 14486 1360 14490
      1360 14495 1352 14492 1351 14489 1349 14488
      1343 14480 1342 14478 1341 14479 1339 14477
      1348 14470 1348 14476 1349 14477

FLASH FLOOD...RADAR AND GAUGE INDICATED

$$

KK

Flash Flood Warnings in Guam, 2021Every flash flood warning in 2021

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; radar from the NEXRAD Level II archive.