Alert archive / Pennsylvania / Flash Flood Warnings in 2021
Flash Flood Warning 5, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jun 13, 2021, 5:29 PM EDT for Allegheny County, Westmoreland County, Pennsylvania. It was in force for 3 hr. 11 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 13, 2021, 5:29 PM EDT (21:29 UTC)
- Expired
- Jun 13, 2021, 8:45 PM EDT
- In force
- 3 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Allegheny County, PA, Westmoreland County, PA
The radar
The Pittsburgh radar (KPBZ), 41 km from the middle of the area, began a volume at 21:29 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 13, 6:15 PM EDT | FLOOD | Squirrel Hill, PA | MINOR STREET FLOODING |
| Jun 13, 6:16 PM EDT | FLOOD | Swissvale, PA | MINOR STREET FLOODING |
| Jun 13, 6:30 PM EDT | FLOOD | 4 Nw West Mifflin, PA | WIDESPREAD FLOODING |
| Jun 13, 6:30 PM EDT | FLASH FLOOD | 1 N Monroeville, PA | INTERSTATE 376 EAST ON RAMP AT MONROEVILLE FLOODED WITH STRANDED CAR. TIME ESTIMATED. |
| Jun 13, 6:30 PM EDT | FLASH FLOOD | Munhall, PA | REPORT OF 7 FOOT DEEP WATER OVER ROADWAY IN MUNHALL. |
| Jun 13, 6:30 PM EDT | HEAVY RAIN 2.02 | N Baldwin, PA | |
| Jun 13, 6:45 PM EDT | FLASH FLOOD | West Mifflin, PA | NUMEROUS REPORTS OF VEHICLES STUCK IN FLOOD WATERS ACROSS THE COUNTY AND AROUND PITTSBURGH. |
| Jun 13, 6:55 PM EDT | FLASH FLOOD | Whitehall, PA | INTERSECTION OF PROVOST AND WAYMAN FLOODED BY NEARBY SAW MILL RUN BEING OUT OF ITS BANKS. |
| Jun 13, 7:15 PM EDT | FLASH FLOOD | Baldwin, PA | WATER RESCUE OF SEVERAL PEOPLE TRAPPED IN VEHICLES IN THE VICINITY OF 4846 STREETS RUN RD. |
| Jun 13, 7:15 PM EDT | FLASH FLOOD | Pleasant Hills, PA | MULTIPLE VEHICLES TRAPPED IN FLOOD WATERS OF CLAIRTON BLVD AND LEWIS RUN RD. |
| Jun 13, 7:26 PM EDT | FLOOD | W Castle Shannon, PA | MINOR STREET FLOODING |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 9.5 hours before the alert went out and 25 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1001 J/kg
- Mixed-layer CIN
- -33 J/kg
- Mixed-layer LCL
- 944 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 53 m²/s²
- 0-3 km storm-relative helicity
- 47 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.3
The text
As transmitted.
923
WGUS51 KPBZ 132129
FFWPBZ
PAC003-129-132330-
/O.NEW.KPBZ.FF.W.0005.210613T2129Z-210613T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
529 PM EDT Sun Jun 13 2021
The National Weather Service in Pittsburgh has issued a
* Flash Flood Warning for...
Southeastern Allegheny County in southwestern Pennsylvania...
Southwestern Westmoreland County in southwestern Pennsylvania...
* Until 730 PM EDT.
* At 529 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Up to 1 inch of rain has
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...
Pittsburgh, Penn Hills, Mount Lebanon, Bethel Park, Monroeville,
Greensburg, McKeesport, Jeannette, West Mifflin, Baldwin,
Murrysville, Wilkinsburg, Whitehall, South Park Township, Munhall,
Jefferson Hills, North Versailles, Brentwood, Swissvale and Castle
Shannon.
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 4020 7986 4024 7992 4025 7991 4027 7995
4038 8004 4045 7995 4044 7974 4037 7949
4013 7976
FLASH FLOOD...RADAR INDICATED
$$5 follow-up statements
983
WGUS71 KPBZ 132222
FFSPBZ
Flash Flood Statement
National Weather Service Pittsburgh PA
622 PM EDT Sun Jun 13 2021
PAC003-129-132330-
/O.CON.KPBZ.FF.W.0005.000000T0000Z-210613T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegheny PA-Westmoreland PA-
622 PM EDT Sun Jun 13 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT THIS
EVENING FOR SOUTHEASTERN ALLEGHENY AND SOUTHWESTERN WESTMORELAND
COUNTIES...
At 622 PM EDT, Doppler radar indicated thunderstorms producing heavy
rain across the warned area. Between 0.5 and 1.5 inches of rain have
fallen. An additional 1 to 2 inches are possible. Flash flooding is
ongoing or expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Radar.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Pittsburgh, Penn Hills, Mount Lebanon, Bethel Park, Monroeville,
Greensburg, McKeesport, Jeannette, West Mifflin, Baldwin,
Murrysville, Wilkinsburg, Whitehall, South Park Township, Munhall,
Jefferson Hills, North Versailles, Brentwood, Swissvale and Castle
Shannon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4020 7986 4024 7992 4025 7991 4027 7995
4038 8004 4045 7995 4044 7974 4037 7949
4013 7976
FLASH FLOOD...RADAR INDICATED
$$116
WGUS71 KPBZ 132305
FFSPBZ
Flash Flood Statement
National Weather Service Pittsburgh PA
705 PM EDT Sun Jun 13 2021
PAC003-129-132330-
/O.CON.KPBZ.FF.W.0005.000000T0000Z-210613T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegheny PA-Westmoreland PA-
705 PM EDT Sun Jun 13 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 730 PM EDT THIS
EVENING FOR SOUTHEASTERN ALLEGHENY AND SOUTHWESTERN WESTMORELAND
COUNTIES...
At 705 PM EDT, Public reports indicate flooding in Castle Shannon
and Whitehall. Between 1.5 and 3 inches of rain have fallen.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Public 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...
Pittsburgh, Penn Hills, Mount Lebanon, Bethel Park, Monroeville,
Greensburg, McKeesport, Jeannette, West Mifflin, Baldwin,
Murrysville, Wilkinsburg, Whitehall, South Park Township, Munhall,
Jefferson Hills, North Versailles, Brentwood, Swissvale and Castle
Shannon.
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 4020 7986 4024 7992 4025 7991 4027 7995
4038 8004 4045 7995 4044 7974 4037 7949
4013 7976
FLASH FLOOD...OBSERVED
$$501
WGUS51 KPBZ 132324
FFWPBZ
PAC003-129-140000-
/O.EXT.KPBZ.FF.W.0005.000000T0000Z-210614T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
724 PM EDT Sun Jun 13 2021
The National Weather Service in Pittsburgh has extended the
* Flash Flood Warning for...
Southeastern Allegheny County in southwestern Pennsylvania...
Southwestern Westmoreland County in southwestern Pennsylvania...
* Until 800 PM EDT.
* At 724 PM EDT, Public reports indicate flooding in Castle Shannon
and Whitehall as well as numerous roadways across the region.
Warning has been extended to allow more time for water to recede.
Between 1.5 and 3 inches of rain have fallen.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Public reported.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Pittsburgh, Penn Hills, Mount Lebanon, Bethel Park, Monroeville,
Greensburg, McKeesport, Jeannette, West Mifflin, Baldwin,
Murrysville, Wilkinsburg, Whitehall, South Park Township, Munhall,
Jefferson Hills, North Versailles, Brentwood, Swissvale and Castle
Shannon.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
Be aware of your surroundings and do not drive on flooded roads.
&&
LAT...LON 4020 7986 4024 7992 4025 7991 4027 7995
4038 8004 4045 7995 4044 7974 4037 7949
4013 7976
FLASH FLOOD...OBSERVED
$$510
WGUS51 KPBZ 132349
FFWPBZ
PAC003-129-140045-
/O.EXT.KPBZ.FF.W.0005.000000T0000Z-210614T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
749 PM EDT Sun Jun 13 2021
The National Weather Service in Pittsburgh has extended the
* Flash Flood Warning for...
Southeastern Allegheny County in southwestern Pennsylvania...
Southwestern Westmoreland County in southwestern Pennsylvania...
* Until 845 PM EDT.
* At 749 PM EDT, Emergency management have reported multiple water
rescues around Pittsburgh and notably in Pleasant Hills. The
warning has been extended to give time for more water to recede.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management 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...
Pittsburgh, Penn Hills, Mount Lebanon, Bethel Park, Monroeville,
Greensburg, McKeesport, Jeannette, West Mifflin, Baldwin,
Murrysville, Wilkinsburg, Whitehall, South Park Township, Munhall,
Jefferson Hills, North Versailles, Brentwood, Swissvale and Castle
Shannon.
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 4020 7986 4024 7992 4025 7991 4027 7995
4038 8004 4045 7995 4044 7974 4037 7949
4013 7976
FLASH FLOOD...OBSERVED
$$900
WGUS71 KPBZ 140051
FFSPBZ
Flash Flood Statement
National Weather Service Pittsburgh PA
851 PM EDT Sun Jun 13 2021
PAC003-129-140101-
/O.EXP.KPBZ.FF.W.0005.000000T0000Z-210614T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Allegheny PA-Westmoreland PA-
851 PM EDT Sun Jun 13 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHEASTERN ALLEGHENY AND
SOUTHWESTERN WESTMORELAND COUNTIES...
Flood waters have receded. The heavy rain has ended. Flooding is no
longer expected to pose a threat. Please continue to heed remaining
road closures.
LAT...LON 4020 7986 4024 7992 4025 7991 4027 7995
4038 8004 4045 7995 4044 7974 4037 7949
4013 7976
$$The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 13, 8:24 AM EDT | Special Weather Statement | PBZ | Westmoreland | 36 min |
| Jun 13, 8:36 AM EDT | Areal Flood Advisory | PBZ | Armstrong, Westmoreland | 71 min |
| Jun 13, 8:51 AM EDT | Areal Flood Advisory | PBZ | Armstrong, Indiana | 103 min |
| Jun 13, 9:02 AM EDT | Special Weather Statement | PBZ | Westmoreland | 13 min |
| Jun 13, 9:39 AM EDT | Special Weather Statement | PBZ | Fayette | 36 min |
| Jun 13, 10:42 AM EDT | Special Weather Statement | PBZ | Fayette | 33 min |
| Jun 13, 1:37 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 38 min |
| Jun 13, 1:57 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 20 min |
| Jun 13, 2:08 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 33 min |
| Jun 13, 3:55 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence, Mercer | 35 min |
| Jun 13, 4:23 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler, Lawrence | 37 min |
| Jun 13, 5:33 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Westmoreland | 27 min |
| Jun 13, 5:43 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Westmoreland | 47 min |
| Jun 13, 5:53 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Forest, Venango | 17 min |
| Jun 13, 5:59 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Washington, Westmoreland | 46 min |
| Jun 13, 6:12 PM EDT | Special Weather Statement | PBZ | Forest | 33 min |
| Jun 13, 6:21 PM EDT | Severe Thunderstorm Warning | PBZ | Greene, Washington | 39 min |
| Jun 13, 6:54 PM EDT | Areal Flood Advisory | PBZ | Allegheny, Washington, Westmoreland | 2 hr |
| Jun 13, 6:58 PM EDT | Special Weather Statement | PBZ | Washington | 47 min |
| Jun 13, 7:22 PM EDT | Flash Flood Warning | PBZ | Allegheny, Washington | 100 min |
| Jun 13, 7:26 PM EDT | Special Weather Statement | PBZ | Fayette | 34 min |
Nearby
Flash Flood Warnings in Pennsylvania, 2021Every flash flood warning in 2021
Sources
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.