Flash Flood Warning 22, NWS Pittsburgh, PA

Issued

Aug 12, 2021, 6:13 PM EDT (22:13 UTC)

Expired

Aug 12, 2021, 8:54 PM EDT

In force

3 hr

Issued by

NWS Pittsburgh, PA

Area

Storm-based polygon

Flood severity

None

Counties Armstrong County, PA, Butler County, PA, Clarion County, PA, Forest County, PA, Jefferson County, PA, Venango County, PA

The State College radar (KCCX), 99 km from the middle of the area, began a volume at 22:13 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.

886 
WGUS51 KPBZ 122213
FFWPBZ
PAC005-019-031-053-065-121-130115-
/O.NEW.KPBZ.FF.W.0022.210812T2213Z-210813T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
613 PM EDT Thu Aug 12 2021

The National Weather Service in Pittsburgh has issued a

* Flash Flood Warning for...
  South Central Forest County in northwestern Pennsylvania...
  Southeastern Venango County in northwestern Pennsylvania...
  Northern Armstrong County in west central Pennsylvania...
  Northeastern Butler County in west central Pennsylvania...
  Clarion County in west central Pennsylvania...
  Jefferson PA County in west central Pennsylvania...

* Until 915 PM EDT.

* At 613 PM EDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 1 and 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...
  Clarion, Brookville, Knox, Rimersburg, Reynoldsville, Brockway, 
  Sykesville, Falls Creek, Parker, Sligo, Emlenton, Strattanville, 
  Summerville, Bruin, Limestone, Shippenville, St. Petersburg, 
  Corsica, Eau Claire and Petrolia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4132 7978 4136 7909 4134 7909 4135 7908
      4136 7903 4135 7902 4137 7900 4137 7896
      4126 7874 4120 7873 4120 7877 4113 7880
      4105 7880 4102 7980

FLASH FLOOD...RADAR INDICATED

$$

087 
WGUS71 KPBZ 122254
FFSPBZ

Flash Flood Statement
National Weather Service Pittsburgh PA
654 PM EDT Thu Aug 12 2021

PAC005-019-031-053-065-121-130115-
/O.CON.KPBZ.FF.W.0022.000000T0000Z-210813T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Armstrong PA-Butler PA-Clarion PA-Forest PA-Jefferson PA PA-
Venango PA-
654 PM EDT Thu Aug 12 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 915 PM EDT THIS 
EVENING FOR SOUTH CENTRAL FOREST, SOUTHEASTERN VENANGO, NORTHERN 
ARMSTRONG, NORTHEASTERN BUTLER, CLARION AND JEFFERSON PA COUNTIES...

At 654 PM EDT, Radar indicated thunderstorms producing heavy rain 
across the warned area. Between 2.00 and 3.00 inches of rain have 
fallen, with an additional 1.00 to 2.00 inches possible. 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...
  Clarion, Brookville, Knox, Rimersburg, Reynoldsville, Brockway, 
  Sykesville, Falls Creek, Parker, Sligo, Emlenton, Strattanville, 
  Summerville, Bruin, Limestone, Shippenville, St. Petersburg, 
  Corsica, Eau Claire and Petrolia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4132 7978 4136 7909 4134 7909 4135 7908
      4136 7903 4135 7902 4137 7900 4137 7896
      4126 7874 4120 7873 4120 7877 4113 7880
      4105 7880 4102 7980

FLASH FLOOD...RADAR INDICATED

$$

429 
WGUS71 KPBZ 130054
FFSPBZ

Flash Flood Statement
National Weather Service Pittsburgh PA
854 PM EDT Thu Aug 12 2021

PAC005-019-031-053-065-121-130104-
/O.CAN.KPBZ.FF.W.0022.000000T0000Z-210813T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Armstrong PA-Butler PA-Clarion PA-Forest PA-Jefferson PA PA-
Venango PA-
854 PM EDT Thu Aug 12 2021

...FLASH FLOOD WARNING IS CANCELLED FOR SOUTH CENTRAL FOREST, 
SOUTHEASTERN VENANGO, NORTHERN ARMSTRONG, NORTHEASTERN BUTLER, 
CLARION AND JEFFERSON PA COUNTIES...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat, though creeks and streams will remain elevated due to 
residual runoff. Please continue to heed remaining road closures.

LAT...LON 4132 7978 4136 7909 4134 7909 4135 7908
      4136 7903 4135 7902 4137 7900 4137 7896
      4126 7874 4120 7873 4120 7877 4113 7880
      4105 7880 4102 7980

$$

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.