Alert archive / Pennsylvania / Flash Flood Warnings in 2021
Flash Flood Warning 14, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jul 16, 2021, 7:24 PM EDT for Mercer County, Venango County, Pennsylvania. It was in force for 3 hr. 5 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
- Jul 16, 2021, 7:24 PM EDT (23:24 UTC)
- Expired
- Jul 16, 2021, 10:30 PM EDT
- In force
- 3 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Storm-based polygon
- Flood severity
- None
Counties Mercer County, PA, Venango County, PA
The radar
The Pittsburgh radar (KPBZ), 93 km from the middle of the area, began a volume at 23:27 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 |
|---|---|---|---|
| Jul 16, 7:46 PM EDT | FLASH FLOOD | 1 S Reynolds Heights, PA | CRESTVIEW DRIVE NEAR REYNOLDS VFW FLOODED |
| Jul 16, 7:46 PM EDT | FLASH FLOOD | 1 S Reynolds Heights, PA | CRESTVIEW DRIVE NEAR REYNOLDS VFW FLOODED. 20 FT OF ROADWAY WASHED OUT ALONG SR-4014 NEAR REYNOLDS INDUSTRIAL PARK RD. |
| Jul 16, 7:51 PM EDT | FLASH FLOOD | 1 Se Reynolds Heights, PA | VEHICLE SUBMERGED ON EAST CRESTVIEW DRIVE. |
| Jul 16, 9:02 PM EDT | FLASH FLOOD | Polk, PA | MULTIPLE ROADS HAVE FLOODING ISSUES. |
| Jul 16, 9:45 PM EDT | FLASH FLOOD | 1 Ese Fredonia, PA | WATER RESCUE ALONG DELAWARE RD FOR A CAR STRANDED IN FLOOD WATER |
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, 11.4 hours before the alert went out and 107 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
- 145 J/kg
- Mixed-layer CIN
- -86 J/kg
- Mixed-layer LCL
- 846 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 61 m²/s²
- 0-3 km storm-relative helicity
- 68 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.5
The text
As transmitted.
988
WGUS51 KPBZ 162324
FFWPBZ
PAC085-121-170230-
/O.NEW.KPBZ.FF.W.0014.210716T2324Z-210717T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
724 PM EDT Fri Jul 16 2021
The National Weather Service in Pittsburgh has issued a
* Flash Flood Warning for...
Mercer County in northwestern Pennsylvania...
West Central Venango County in northwestern Pennsylvania...
* Until 1030 PM EDT.
* At 724 PM EDT, Doppler radar indicated thunderstorms producing
heavy rain across the warned area. Between 1 and 1.5 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...
Hermitage, Sharon, Franklin, Sharpsville, Greenville, Sugarcreek,
Farrell, Mercer, Stoneboro, West Middlesex, Polk, Sandy Lake,
Clark, Wheatland, Fredonia, Cooperstown, Jackson Center, Utica,
New Lebanon and Sheakleyville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4137 8052 4141 8045 4148 8018 4151 7987
4140 7977 4128 7993 4114 8052
FLASH FLOOD...RADAR INDICATED
$$
JL3 follow-up statements
387
WGUS71 KPBZ 162350
FFSPBZ
Flash Flood Statement
National Weather Service Pittsburgh PA
750 PM EDT Fri Jul 16 2021
PAC085-121-170230-
/O.CON.KPBZ.FF.W.0014.000000T0000Z-210717T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mercer PA-Venango PA-
750 PM EDT Fri Jul 16 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT THIS
EVENING FOR MERCER AND WEST CENTRAL VENANGO COUNTIES...
At 750 PM EDT, local law enforcement reported flooding across the
warned area. Between 1 and 1.5 inches of rain have fallen.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Law enforcement reported.
IMPACT...Flash flooding of small creeks and streams, urban areas,
highways, streets and underpasses as well as other poor
drainage and low-lying areas.
Some locations that will experience flash flooding include...
Hermitage, Sharon, Franklin, Sharpsville, Greenville, Sugarcreek,
Farrell, Mercer, Stoneboro, West Middlesex, Polk, Sandy Lake,
Clark, Wheatland, Fredonia, Cooperstown, Jackson Center, Utica,
New Lebanon and Sheakleyville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4137 8052 4141 8045 4148 8018 4151 7987
4140 7977 4128 7993 4114 8052
FLASH FLOOD...OBSERVED
$$
JL106
WGUS71 KPBZ 170016
FFSPBZ
Flash Flood Statement
National Weather Service Pittsburgh PA
816 PM EDT Fri Jul 16 2021
PAC085-121-170230-
/O.CON.KPBZ.FF.W.0014.000000T0000Z-210717T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mercer PA-Venango PA-
816 PM EDT Fri Jul 16 2021
...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM EDT THIS
EVENING FOR MERCER AND WEST CENTRAL VENANGO COUNTIES...
At 816 PM EDT, HAZARD...Flash flooding caused by heavy rain.
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...
Hermitage, Sharon, Franklin, Sharpsville, Greenville, Sugarcreek,
Farrell, Mercer, Stoneboro, West Middlesex, Polk, Sandy Lake,
Clark, Wheatland, Fredonia, Cooperstown, Jackson Center, Utica,
New Lebanon and Sheakleyville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4137 8052 4141 8045 4148 8018 4151 7987
4140 7977 4128 7993 4114 8052
FLASH FLOOD...OBSERVED
$$
JL053
WGUS71 KPBZ 170232
FFSPBZ
Flash Flood Statement
National Weather Service Pittsburgh PA
1032 PM EDT Fri Jul 16 2021
PAC085-121-170242-
/O.EXP.KPBZ.FF.W.0014.000000T0000Z-210717T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Mercer PA-Venango PA-
1032 PM EDT Fri Jul 16 2021
...FLASH FLOOD WARNING HAS EXPIRED FOR MERCER AND WEST CENTRAL
VENANGO COUNTIES...
The heavy rain has ended. Ongoing flooding will continue until water
slowly recedes over the next few hours. Please continue to heed
remaining road closures.
LAT...LON 4137 8052 4141 8045 4148 8018 4151 7987
4140 7977 4128 7993 4114 8052
$$
KramarThe office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 8:43 PM EDT | Special Weather Statement | PBZ | Mercer | 47 min |
| Jul 16, 1:04 PM EDT | Special Weather Statement | PBZ | Mercer | 41 min |
| Jul 16, 2:03 PM EDT | Special Weather Statement | PBZ | Beaver | 42 min |
| Jul 16, 2:27 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler, Lawrence | 48 min |
| Jul 16, 2:49 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Beaver, Butler, Clarion, Lawrence | 41 min |
| Jul 16, 2:54 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Beaver, Butler, Westmoreland | 51 min |
| Jul 16, 3:11 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Washington | 34 min |
| Jul 16, 3:23 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 37 min |
| Jul 16, 3:30 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Butler, Clarion, Indiana, Jefferson | 45 min |
| Jul 16, 3:42 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Westmoreland | 33 min |
| Jul 16, 3:56 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana, Jefferson | 49 min |
| Jul 16, 4:12 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 33 min |
| Jul 16, 4:19 PM EDT | Special Weather Statement | PBZ | Westmoreland | 26 min |
| Jul 16, 4:52 PM EDT | Special Weather Statement | PBZ | Washington | 23 min |
| Jul 16, 6:20 PM EDT | Special Weather Statement | PBZ | Westmoreland | 25 min |
| Jul 16, 6:57 PM EDT | Areal Flood Advisory | PBZ | Mercer, Venango | 27 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.