Flash Flood Warning 9, NWS Pittsburgh, PA

Issued

Jun 21, 2021, 7:23 PM EDT (23:23 UTC)

Expired

Jun 21, 2021, 10:30 PM EDT

In force

3 hr

Issued by

NWS Pittsburgh, PA

Area

Storm-based polygon

Flood severity

None

Counties Allegheny County, PA, Fayette County, PA, Washington County, PA, Westmoreland County, PA

The Pittsburgh radar (KPBZ), 34 km from the middle of the area, began a volume at 23:25 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.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

997 
WGUS51 KPBZ 212323
FFWPBZ
PAC003-051-125-129-220230-
/O.NEW.KPBZ.FF.W.0009.210621T2323Z-210622T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
723 PM EDT Mon Jun 21 2021

The National Weather Service in Pittsburgh has issued a

* Flash Flood Warning for...
  Southeastern Allegheny County in southwestern Pennsylvania...
  Northwestern Fayette County in southwestern Pennsylvania...
  Central Washington County in southwestern Pennsylvania...
  Western Westmoreland County in southwestern Pennsylvania...

* Until 1030 PM EDT.

* At 723 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Up to 2 inches of rain have 
  fallen. Flash flooding is ongoing or expected to begin shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Radar.

  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...
  Bethel Park, McMurray, McKeesport, Washington, Canonsburg, Avella, 
  Gastonville, West Mifflin, Baldwin, Upper St. Clair, South Park 
  Township, Cecil-Bishop, Jefferson Hills, Pleasant Hills, White 
  Oak, Monessen, Clairton, Donora, Glassport and Monongahela.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4034 8011 4034 7995 4035 7981 4023 7979
      4022 7980 4012 7986 4015 8005 4014 8020
      4014 8034 4019 8046 4028 8048 4029 8032

FLASH FLOOD...RADAR INDICATED

$$

JL

725 
WGUS71 KPBZ 220006
FFSPBZ

Flash Flood Statement
National Weather Service Pittsburgh PA
806 PM EDT Mon Jun 21 2021

PAC003-051-125-129-220230-
/O.CON.KPBZ.FF.W.0009.000000T0000Z-210622T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegheny PA-Fayette PA-Washington PA-Westmoreland PA-
806 PM EDT Mon Jun 21 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT THIS 
EVENING FOR SOUTHEASTERN ALLEGHENY, NORTHWESTERN FAYETTE, CENTRAL 
WASHINGTON AND WESTERN WESTMORELAND COUNTIES...

At 806 PM EDT, local law enforcement reported flooding across the 
warned area. Up to 2 inches of rain have fallen.

HAZARD...Flash flooding caused by thunderstorms.

SOURCE...Law enforcement 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...
  Bethel Park, McMurray, McKeesport, Washington, Canonsburg, Avella, 
  Gastonville, West Mifflin, Baldwin, Upper St. Clair, South Park 
  Township, Cecil-Bishop, Jefferson Hills, Pleasant Hills, White 
  Oak, Monessen, Clairton, Donora, Glassport and Monongahela.

Flash flooding has been reported in Canonsburg, and Venetia, PA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

LAT...LON 4034 8011 4034 7995 4035 7981 4023 7979
      4022 7980 4012 7986 4015 8005 4014 8020
      4014 8034 4019 8046 4028 8048 4029 8032

FLASH FLOOD...OBSERVED

$$

JL

996 
WGUS71 KPBZ 220227
FFSPBZ

Flash Flood Statement
National Weather Service Pittsburgh PA
1027 PM EDT Mon Jun 21 2021

PAC003-051-125-129-220237-
/O.EXP.KPBZ.FF.W.0009.000000T0000Z-210622T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegheny PA-Fayette PA-Washington PA-Westmoreland PA-
1027 PM EDT Mon Jun 21 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 1030 PM EDT THIS EVENING FOR 
SOUTHEASTERN ALLEGHENY, NORTHWESTERN FAYETTE, CENTRAL WASHINGTON AND 
WESTERN WESTMORELAND COUNTIES...

The heavy rain has ended. This warning is being replaced by an Areal 
Flood Warning. Light rain will persist for a couple more hours and 
flooding may continue to pose a threat. Please continue to heed 
remaining road closures.

LAT...LON 4034 8011 4034 7995 4035 7981 4023 7979
      4022 7980 4012 7986 4015 8005 4014 8020
      4014 8034 4019 8046 4028 8048 4029 8032

$$

Brown

Flash Flood Warnings in Pennsylvania, 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.