Alert archive / Pennsylvania / Flash Flood Warnings in 1992
Flash Flood Warning 39, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Aug 8, 1992, 11:00 PM EDT for Allegheny County, Beaver County, Pennsylvania. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 8, 1992, 11:00 PM EDT (03:00 UTC)
- Expired
- Aug 9, 1992, 2:00 AM EDT
- In force
- 3 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Allegheny County, PA, Beaver County, PA
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 00:00Z, 3.0 hours before the alert went out and 19 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
- 1269 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 705 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 176 m²/s²
- 0-3 km storm-relative helicity
- 191 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 4.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPIT 090310 COR FFWPIT PAC003-007-021-033-051-063-129-090600- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 1100 PM EDT SAT AUG 8 1992 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 200 AM EDT FOR THE FOLLOWING LOCATIONS... IN WEST PENNSYLVANIA ...ALLEGHENY COUNTY...BEAVER COUNTY...CAMBRIA COUNTY ...CLEARFIELD COUNTY...FAYETTE COUNTY...INDIANA COUNTY... ...WESTMORELAND COUNTY NATIONAL WEATHER SERVICE RADAR CONTINUES TO SHOW SEVERE THUNDERSTORMS MOVING THROUGH BEAVER...ALLEGHENY...AND INTO WESTMORELAND COUNTIES. ANOTHER AREA WAS MOVING THROUGH INDIANA..FAYETTE...CAMBRIA AND CLEARFIELD COUNTIES. ALL THESE STORMS HAVE HAD A HISTORY OF CAUSING DOWNPOURS HEAVY ENOUGH TO CAUSE FLASH FLOODING AS WELL AS DESTRUCTIVE WIND...HAIL AND LIGHTNING. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD.
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Aug 8, 7:42 PM EDT, 3 hours 18 minutes before
PAZ001>006-013>015-WVZ001-090300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 745 PM EDT SAT AUG 8 1992 ...SEVERE THUNDERSTORM WATCH AND FLASH FLOOD WATCH FOR NORTHWESTERN PENNSYLVANIA TIL 11 PM... ...SEVERE THUNDERSTORM WARNING AND FLASH FLOOD WARNING FOR BUTLER COUNTY TIL 845 PM... CLEAR:3
Special weather statement, Aug 8, 7:51 PM EDT, 3 hours 9 minutes before
PAZ001>006-013>015-WVZ001-090300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 750 PM EDT SAT AUG 8 1992 ...SEVERE THUNDERSTORM WATCH AND FLASH FLOOD WATCH FOR NORTHWESTERN PENNSYLVANIA TIL 11 PM... ...SEVERE THUNDERSTORM AND FLASH FLOOD WARNING FOR BUTLER COUNTY TIL 845 PM... AT 745 PM SHOWED THREE BANDS OF SEVERE THUNDERSTORMS WITH HEAVY DOWNPOURS ACROSS WESTERN PENNSYLVANIA. THE MOST NORTHERN ONE WAS ALONG THE NEW YORK STATE LINE BUT AFFECTING WARREN COUNTY. THE SECOND BAND WAS ACROSS VENANGO AND CRAWFORD AND NORTHERN MERCER COUNTY HEADING INTO FOREST COUNTY. THE THIRD BAND WAS OVER LAWRENCE AND BUTLER COUNTY WITH MORE STORMS BACK TO CANTON OHIO. EACH BAND WAS HEADING EAST AT 25 MPH. WHEN THUNDERSTORMS THREATEN...MOVE INSIDE. ALSO GET AWAY FROM WATER. DO NOT USE ELECTRICAL APPLIANCES OR TELEPHONES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE TO HIGHER GROUND. ALONG WITH THE FLOODING THUNDERSTORMS WILL ALSO PRODUCE STRONG GUSTY WINDS...POSSIBLE LARGE HAIL AND DANGEROUS LIGHTING. LAG/RWH
Special weather statement, Aug 8, 8:44 PM EDT, 2 hours 16 minutes before
PAZ001>006-013>015-WVZ001-090300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 845 PM EDT SAT AUG 8 1992 ...SEVERE THUNDERSTORM WATCH AND FLASH FLOOD WATCH FOR NORTHWESTERN PENNSYLVANIA TIL 11 PM... ...TORNADO WARNING UNTIL 915 PM FOR BEAVER AND BUTLER COUNTIES AND 945PM PM FOR ARMSTRONG COUNTY... AT 845 PM SHOWED TWO BANDS OF SEVERE THUNDERSTORMS WITH HEAVY DOWNPOURS ACROSS WESTERN PENNSYLVANIA. THE MOST NORTHERN ONE WAS FOUND FROM RIDGWAY TO YOUNGSTOWN OHIO. THE SECOND BAND WAS OCCURRING FROM NORTHERN BUTLER COUNTY WEST TO CANTON OHIO. A SEVERE THUNDERSTORM WITH A POSSIBLE TORNADO WAS FOUND JUST WEST OF EAST BRADY PENNSYLVANIA WITH ANOTHER SEVERE THUNDERSTORM CONTAINING LARGE HAIL...DAMAGING WINDS...AND PERHAPS A TORNADO 5 MILES WEST OF BEAVER FALLS. THESE THUNDERSTORMS ARE MOVING SOUTHEAST AT 30 MILES AN HOUR...AND WILL REACH THE DOWNTOWN AREA WITH THE REGATTA AND FIREWORKS DISPLAY AROUND 930 PM. DO NOT USE ELECTRICAL APPLIANCES OR TELEPHONES UNLESS IN AN EMERGENCY UNTIL THE STORM HAS PASSED. MOTORISTS SHOULD NOT DRIVE INTO LOW WATER CROSSINGS. IF YOU ARE IN THE PATH OF A TORNADO...GO INTO A BASEMENT OR UNDER A STURDY TABLE. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE TO HIGHER GROVUND. ALONG WITH THE FLOODING THUNDERSTORMS WILL ALSO PRODUCE STRONG GUSTY WINDS...POSSIBLE LARGE HAIL AND DANGEROUS LIGHTING. LAG/RWH/REL
Special weather statement, Aug 8, 9:45 PM EDT, 1 hour 15 minutes before
PAZ001>006-013>015-WVZ001-090300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 945 PM EDT SAT AUG 8 1992 ...SEVERE THUNDERSTORM WATCH AND FLASH FLOOD WATCH FOR NORTHWESTERN PENNSYLVANIA TIL 11 PM... ...SEVERE THUNDERSTORM WARNING AND FLASH FLOOD WARNING UNTIL 11 PM FOR ALLEGHENY...BEAVER...AND BUTLER COUNTIES... AT 945 PM SHOWED A LARGE AREA OF THUNDERSTORMS...A FEW SEVERE...FROM COUDERSPORT PENNSYLVANIA TO LISBON OHIO. SEVERE THUNDERSTORMS CONTAINING DAMAGING WINDS OF 60 MILES AN HOUR...LARGE HAIL...AND DEADLY LIGHTNING ARE CURRENTLY FOUND IN NORTHERN BUTLER COUNTY...IN RICHLAND TOWNSHIP IN NORTHERN ALLEGHENY COUNTY...AND JUST EAST OF ELLWOOD CITY. IF YOU ARE IN THE PATH OF THESE STORMS...TAKE COVER IMMEDIATELY IN A STURDY BUILDING. STAY AWAY FROM WINDOWS AND DO NOT USE ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED. OTHER THUNDERSTORMS ARE PRESENT FROM WEST OF WHEELING TO NEAR COLUMBUS. ONE INCH RAINFALL AMOUNTS IN LESS THAN HALF AN HOUR ARE BEING REPORTED IN THE STORMS IN ARMSTRONG AND BUTLER COUNTIES. DO NOT TRY TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY...EVEN IF IT APPEARS TO BE SHALLOW. TO ESCAPE RISING WATER MOVE TO HIGHER GROUND. CAMPERS SHOULD TAKE EXTRA PRECAUTIONS BECAUSE CREEKS CAN INUNDATE AREAS WITHIN MINUTES. ALONG WITH THE FLOODING THUNDERSTORMS WILL ALSO PRODUCE STRONG GUSTY GUSTY WINDS...POSSIBLE LARGE HAIL AND DANGEROUS LIGHTING. LAG/RWH/REL/JMP/MEF
Special weather statement, Aug 8, 10:43 PM EDT, 17 minutes before
PAZ001>006-013>015-WVZ001-090300- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 1040 PM EDT SAT AUG 8 1992 ...SEVERE THUNDERSTORM WATCH AND FLASH FLOOD WATCH FOR NORTHWESTERN PENNSYLVANIA TIL 11 PM... ...SEVERE THUNDERSTORM WARNING AND FLASH FLOOD WARNING UNTIL 11 PM FOR ALLEGHENY...BEAVER...AND BUTLER COUNTIES... PITTSBURGH RADAR SHOWED A LARGE AREA OF THUNDERSTORMS...A FEW SEVERE...FROM EMPORIUM PENNSYLVANIA TO WHEELING WV. SEVERE THUNDERSTORMS CONTAINING DAMAGING WINDS...LARGE HAIL...AND DEADLY LIGHTNING ARE CURRENTLY FOUND IN NORTHERN WESTMORELAND COUNTY...JUST EAST OF NEW KENSINGTON...SOUTHERN JEFFERSON COUNTY EAST OF PUNXSUTAWNEY AND JUST NORTH OF KITTANNING. IF IN THE PATH OF THESE STORMS...TAKE COVER IMMEDIATELY IN A STURDY BUILDING. STAY AWAY FROM WINDOWS AND DO NOT USE ELECTRICAL APPLIANCES UNTIL THE STORM HAS PASSED. OTHER THUNDERSTORMS ARE LOCATED BETWEEN CANTON OHIO AND MORAINE STATE PARK. ONE INCH RAINFALL AMOUNTS IN LESS THAN HALF AN HOUR ARE BEING REPORTED IN THE STORMS IN WESTMORELAND AND BUTLER COUNTIES. DO NOT TRY TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY...EVEN IF IT APPEARS TO BE SHALLOW. TO ESCAPE RISING WATER MOVE TO HIGHER GROUND. CAMPERS SHOULD TAKE EXTRA PRECAUTIONS BECAUSE CREEKS CAN INUNDATE AREAS WITHIN MINUTES. ALONG WITH THE FLOODING THUNDERSTORMS WILL ALSO PRODUCE STRONG GUSTY GUSTY WINDS...POSSIBLE LARGE HAIL AND DANfGEROUS LIGHTING. LAG/RWH/REL/MF/JP
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 8:00 PM EDT | Flash Flood Warning | PBZ | Beaver | 60 min |
| Aug 8, 8:00 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 60 min |
| Aug 8, 8:18 PM EDT | Flash Flood Warning | PBZ | Beaver, Butler | 57 min |
| Aug 8, 8:18 PM EDT | Tornado Warning | PBZ | Beaver, Butler | 57 min |
| Aug 8, 8:36 PM EDT | Flash Flood Warning | PBZ | Armstrong | 69 min |
| Aug 8, 8:36 PM EDT | Tornado Warning | PBZ | Armstrong | 69 min |
| Aug 8, 9:16 PM EDT | Flash Flood Warning | PBZ | Beaver, Butler | 104 min |
| Aug 8, 9:20 PM EDT | Flash Flood Warning | PBZ | Beaver, Butler | 100 min |
| Aug 8, 9:20 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler | 100 min |
| Aug 8, 9:35 PM EDT | Flash Flood Warning | PBZ | Allegheny | 85 min |
| Aug 8, 9:35 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 85 min |
| Aug 8, 11:00 PM EDT | Flash Flood Warning | PBZ | Cambria, Clearfield, Indiana, Westmoreland | 3 hr |
| Aug 8, 11:00 PM EDT | Flash Flood Warning | PBZ | Fayette | 3 hr |
| Aug 8, 11:00 PM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Clearfield, Indiana, Westmoreland | 3 hr |
| Aug 8, 11:00 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 3 hr |
| Aug 8, 11:00 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 3 hr |
| Aug 9, 12:15 AM EDT | Flash Flood Warning | PBZ | Somerset | 105 min |
| Aug 9, 12:15 AM EDT | Severe Thunderstorm Warning | PBZ | Somerset | 105 min |
| Aug 9, 2:00 AM EDT | Flash Flood Warning | PBZ | Fayette | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 1992Every flash flood warning in 1992
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive.