Alert archive / Pennsylvania / Flash Flood Warnings in 1989
Flash Flood Warning 39, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Aug 23, 1989, 7:30 PM EDT for Fayette County, Westmoreland County, Pennsylvania. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Aug 23, 1989, 7:30 PM EDT (23:30 UTC)
- Expired
- Aug 23, 1989, 10:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Fayette County, PA, Westmoreland County, PA
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 11.5 hours before the alert went out and 57 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
- 90 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 783 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 23, 6:26 PM EDT, 1 hour 4 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH, PA 625 PM EDT WED AUG 23 1989 ...THUNDERSTORMS WITH HEAVY DOWNPOURS MOVING INTO WASHINGTON... FAYETTE AND SOMERSET COUNTIES... THUNDERSTORMS WITH HEAVY DOWNPOURS WILL MOVE ACROSS WASHINGTON... FAYETTE...SOMERSET AND GREENE COUNTIES BETWEEN 630 AND 730 PM. THE HEAVY DOWPOURS MAY CAUSE PONDING OF WATER ON ROAD SURFACES AND FLOODING IN POOR DRAINAGE AREAS. SOME OF THESE THUNDERSTOjRMS WILL BE ACCOMPANIED BY STRONG GUSTY WINDS AND DANGEROUS LIGHTNING. IF THREATENING WEATHER APPROACHES...GO TO A SAFE PLACE IMMEDIATELY. DO NOT DRIVE THROUGH FLOODED AREAS. DAVIS
Special weather statement, Aug 23, 6:34 PM EDT, 56 minutes before
SPECIAL WEATHER STATEMENT CORRECTED NATIONAL WEATHER SERVICE PITTSBURGH, PA 632 PM EDT WED AUG 23 1989 ...THUNDERSTORMS WITH HEAVY DOWNPOURS MOVING INTO WASHINGTON... FAYETTE GREENE AND SOMERSET COUNTIES... THUNDERSTORMS WITH HEAVY DOWNPOURS...NOW IN SOUTHERN WESTMORELAND COUNTY...WILL MOVE ACROSS WASHINGTON...FAYETTE...SOMERSET AND GREENE COUNTIES IN WESTERN PENNSYLVANIA BETWEEN 630 AND 730 PM. THE HEAVY DOWPOURS MAY CAUSE PONDING OF WATER ON ROAD SURFACES AND FLOODING IN POOR DRAINAGE AREAS. SOME OF THESE THUNDERSTORMS WILL BE ACCOMPANIED BY STRONG GUSTY WINDS AND DANGEROUS LIGHTNING. IF THREATENING WEATHER APPROACHES...GO TO A SAFE PLACE IMMEDIATELY. DO NOT DRIVE THROUGH FLOODED AREAS. DAVIS
Special weather statement, Aug 23, 7:03 PM EDT, 27 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH, PA 700 PM EDT WED AUG 23 1989 ...HEAVY RAIN FALLS IN WESTMORELAND COUNTY ON SEWICKLEY CREEK... THUNDERSTORMS WITH HEAVY DOWNPOURS THAT MOVED ACROSS SOUTHERN WESTMORELAND COUNTY DROPPED AROUND TWO INCHES OF RAIN BETWEEN NEW STANTON AND MOUNT PLEASANT IN THE SEWICKLEY CREEK WATERSHED. SOME BASEMENT FLOODING WAS REPORTED IN MOUNT PLEASANT. THREE AND A HALF INCHES OF RAIN IN THREE HOURS WOULD BE NEEDED TO BRING STREAMS AND CREEKS OUT OF THEIR BANKS. SOME RAPID RISES CAN BE EXPECTED ON SEWICKLEY AND JACOBS CREEK FROM THE HEAVY RAIN. THE HEAVY RAIN MAY CAUSE PONDING OF WATER ON ROAD SURFACES FLOODING IN POOR DRAINAGE AREAS. THE THUNDERSTORMS ARE SLIDING SLOWLY SOUTH OF WESTMORELAND COUNTY INTO FAYETTE AND SOMERSET COUNTIES...EASING THE THREAT OF CREEK FLOODING IN SOUTHERN WESTMORELAND COUNTY. THE THUNDERSTORMS MAY BE ACCOMPANIED BY STRONG GUSTY WINDS AND DANGEROUS LIGHTNING. IF THREATENING WEATHER APPROACHES...GO TO A SAFE PLACE IMMEDIATELY. DO NOT DRIVE THROUGH FLOODED AREAS. DAVIS
Special weather statement, Aug 23, 7:09 PM EDT, 21 minutes before
SPECIAL WEATHER STATEMENT CORRECTED NATIONAL WEATHER SERVICE PITTSBURGH, PA 707 PM EDT WED AUG 23 1989 ...HEAVY RAIN FALLS IN WESTMORELAND COUNTY ON SEWICKLEY CREEK... THUNDERSTORMS WITH HEAVY DOWNPOURS THAT MOVED ACROSS SOUTHERN WESTMORELAND COUNTY IN WESTERN PENNSYLVANIA DROPPED AROUND TWO INCHES OF RAIN IN ONE HOUR BETWEEN NEW STANTON AND MOUNT PLEASANT IN THE SEWICKLEY CREEK WATERSHED. SOME BASEMENT FLOODING WAS REPORTED IN MOUNT PLEASANT. THREE AND A HALF INCHES OF RAIN IN THREE HOURS WOULD BE NEEDED TO BRING STREAMS AND CREEKS OUT OF THEIR BANKS. SOME RAPID RISES CAN BE EXPECTED ON SEWICKLEY AND JACOBS CREEK FROM THE HEAVY RAIN. THE HEAVY RAIN MAY CAUSE PONDING OF WATER ON ROAD SURFACES AND FLOODING IN POOR DRAINAGE AREAS. THE THUNDERSTORMS ARE SLIDING SLOWLY SOUTH OF WESTMORELAND COUNTY INTO FAYETTE AND SOMERSET COUNTIES...EASING THE THREAT OF CREEK FLOODING IN SOUTHERN WESTMORELAND COUNTY. THE THUNDERSTORMS MAY BE ACCOMPANIED BY STRONG GUSTY WINDS AND DANGEROUS LIGHTNING. IF THREATENING WEATHER APPROACHES...GO TO A SAFE PLACE IMMEDIATELY. DO NOT DRIVE THROUGH FLOODED AREAS. DAVIS
Nearby
Flash Flood Warnings in Pennsylvania, 1989Every flash flood warning in 1989
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.