Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 5, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jun 8, 1990, 11:21 PM EDT for Allegheny County, Armstrong County, Butler County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jun 8, 1990, 11:21 PM EDT (03:21 UTC)
- Expired
- Jun 9, 1990, 1:30 AM EDT
- In force
- 2 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Allegheny County, PA, Armstrong County, PA, Butler 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 00:00Z, 3.4 hours before the alert went out and 44 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
- 1817 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 1091 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 233 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 10.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPIT 090321 FFWPIT PAC003-005-019-090530- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 1121 PM EDT FRI JUN 8 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 130 AM EDT FOR THE FOLLOWING LOCATIONS... IN WEST PENNSYLVANIA ...ALLEGHENY COUNTY...ARMSTRONG COUNTY...BUTLER COUNTY AT 1115 PM EDT WEATHER RADAR SHOWED ONE SEVERE THUNDERSTORM OVER BUTLER AND ARMSTRONG COUNTY BETWEEN MORAINE STATE PARK AND KITTANNING...AND ANOTHER SEVERE STORM OVER THE PITTSBURGH NORTH HILLS AREA OF ALLEGHENY COUNTY. THESE STORMS ARE MOVING SLOWLY EAST. BESIDES HIGH WINDS...HAIL...AND DANGEROUS LIGHTNING....THERE COULD BE HEAVY RAIN AND FLOODING. 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, Jun 8, 5:51 PM EDT, 5 hours 30 minutes before
PAZ001>006-013>015-WVZ001-090400- SPECIAL WEATHER/FLOOD STATEMENT AND WEATHER RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 545 PM EDT FRI JUN 8 1990 ...TORNADO WATCH TIL 10 PM FOR THE WEST VIRGINIA NORTHERN PANHANDLE AND FOR WESTERN PENNSYLVANIA SOUTH OF INTERSTATE 80. FLOOD WATCH FOR AREA STREAMS AND CREEKS TIL MIDNIGHT... IF YOURE IN FAYETTE SOMERSET...THE JOHNSTOWN AREA OF CAMBRIA COUNTY... BEDFORD FULTON AND FRANKLIN COUNTIES EARLY THIS EVENING...BE ON THE LOOKOUT FOR FLOODING ALONG SMALL STREAMS AND WHERE DRAINAGE IS POOR. SOME AREAS GOT CLOSE TO TWO INCHES OF RAIN BETWEEN 3 AND 430. JUST BEFORE 6 PM...THERE WERE NO THUNDERSTORMS OVER WESTERN PENNSYLVANIA...ONLY STORMS OVER OHIO. THE NEAREST OHIO STORMS WERE AROUND CAMBRIDGE AND ZANESVILLE STILL MOVING EASTSOUTHEAST AT 30 MILES AN HOUR. THIS STORM MAY AFFECT MARSHALL COUNTY WEST VIRGINIA AROUND 7 PM OR SO...WITH STRONG WIND GUSTS AND HEAVY DOWNPOURS POSSIBLE. THERE WERE OTHER STORMS IN OHIO BEHIND THIS ONE...AND THESE COULD BRING HEAVY RAIN AND HIGH WIND TO THE PENNSYLVANIA AND WEST VIRGINIA WATCH AREA LATER THIS EVENING. SO IF YOURE OUT THIS EVENING...KEEP AN EYE OUT FOR APPROACHING BAD WEATHER AND WHERE YOU CAN GO FOR SAFE SHELTER. ALSO KEEP THE RADIO OR TV ON FOR POSSIBLE WARNINGS. GIORDANO/STEWART/REHAK
Special weather statement, Jun 8, 6:47 PM EDT, 4 hours 34 minutes before
PAZ001>006-013>015-WVZ001-090400- SPECIAL WEATHER/FLOOD STATEMENT AND WEATHER RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 645 PM EDT FRI JUN 8 1990 ...TORNADO WATCH TIL 10 PM FOR THE WEST VIRGINIA NORTHERN PANHANDLE AND FOR WESTERN PENNSYLVANIA SOUTH OF INTERSTATE 80. FLOOD WATCH FOR AREA STREAMS AND CREEKS TIL MIDNIGHT... AT 645 PM WEATHER RADAR SHOWED TWO STRONG THUNDERSTORMS OVER ALLEGHENY COUNTY OF PENNSYLVANIA. ONE STORM WAS LOCATED NEAR DOWNTOWN PITTSBURGH ...AND THE OTHER WAS JUST TO THE WEST OF DOWNTOWN. HAIL...A HALF INCH IN DIAMETER...WAS REPORTED IN DOWNTOWN PITTSBURGH WITH ONE STORM. HEAVY RAIN...STRONG WINDS AND DANGEROUS LIGHTNING MAY ALSO ACCOMPANY THESE STORMS. THERE WERE OTHER STORMS IN OHIO BEHIND THIS ONE...AND THESE COULD BRING HEAVY RAIN AND HIGH WIND TO THE PENNSYLVANIA AND WEST VIRGINIA WATCH AREA LATER THIS EVENING. SO IF YOURE OUT THIS EVENING...KEEP AN EYE OUT FOR APPROACHING BAD WEATHER ANDG WHERE YOU CAN GO FOR SAFE SHELTER. ALSO KEEP THE RADIO OR TV ON FOR POSSIBLE WARNINGS. GIORDANO/STEWART/REHAK
Special weather statement, Jun 8, 6:52 PM EDT, 4 hours 29 minutes before
PAZ001>006-013>015-WVZ001-090400- SPECIAL WEATHER/FLOOD STATEMENT AND WEATHER RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 645 PM EDT FRI JUN 8 1990 ...TORNADO WATCH TIL 10 PM FOR THE WEST VIRGINIA NORTHERN PANHANDLE AND FOR WESTERN PENNSYLVANIA SOUTH OF INTERSTATE 80. FLOOD WATCH FOR AREA STREAMS AND CREEKS TIL MIDNIGHT... AT 645 PM WEATHER RADAR SHOWED TWO STRONG THUNDERSTORMS OVER ALLEGHENY COUNTY OF PENNSYLVANIA. ONE STORM WAS LOCATED NEAR DOWNTOWN PITTSBURGH ...AND THE OTHER WAS JUST TO THE WEST OF DOWNTOWN. HAIL...A HALF INCH IN DIAMETER...WAS REPORTED IN DOWNTOWN PITTSBURGH WITH ONE STORM. STRONG WINDS AND DANGEROUS LIGHTNING MAY ALSO OCCUR. REPEATED HEAVY RAIN WILL CAUSE FLOODING. NEVER DRIVE THROUGH FLOODING. THERE WERE OTHER STORMS IN OHIO BEHIND THIS ONE...AND THESE COULD BRING HEAVY RAIN AND HIGH WIND TO THE PENNSYLVANIA AND WEST VIRGINIA WATCH AREA LATER THIS EVENING. SO IF YOURE OUT THIS EVENING...NKEEP AN EYE OUT FOR BAD WEATHER AND FOR SAFE PLACES TO TAKE SHELTER. ALSO KEEP THE RADIO OR TV ON FOR POSSIBLE WARNINGS. REHAK/GIORDANO/NOUHAN
Special weather statement, Jun 8, 7:41 PM EDT, 3 hours 40 minutes before
PAZ001>006-013>015-WVZ001-090400- SPECIAL WEATHER/FLOOD STATEMENT AND WEATHER RADAR SUMMARY NATIONAL WEATHER SERVICE PITTSBURGH PA 740 PM EDT FRI JUN 8 1990 ...TORNADO WARNING FOR WESTMORELAND COUNTY TIL 815... ...TORNADO WATCH TIL 10 PM FOR THE WEST VIRGINIA NORTHERN PANHANDLE AND FOR WESTERN PENNSYLVANIA SOUTH OF INTERSTATE 80. FLOOD WATCH FOR AREA STREAMS AND CREEKS TIL MIDNIGHT... AT 730 PITTSBURGH WEATHER RADAR SHOWED THUNDERSTORMS STILL CAPABLE OF PRODUCING A TORNADO AND LARGE HAIL OVER NORTHERN WESTMORELAND COUNTY HEADING EASTWARD AT 25 MILES AN HOUR TOWARD VANDERGRIFT AND BLAIRSVILLE IN SOUTHERN ARMSTRONG AND INDIANA COUNTIES. THERE WERE OTHER STRONG THUNDERSTORMS OVER SOUTHERN WESTMORELAND COUNTY AND NORTHERN FAYETTE COUNTY ALSO GOING EAST...AFFECTING MOUNT PLEASANT AND CONNELLSVILLE. REPEATED HEAVY RAIN FROM THESE THUNDERSTORMS MAY CAUSE FLOODING. RADAR SHOWED OTHER STRONG THUNDERSTORMS DEVELOPING OVER NORTHWEST PENNSYLVANIA BETWEEN CLEARFIELD DUBOIS AND FRANKLIN...WITH STILL MORE OVER EASTERN OHIO...BETWEEN YOUNGSTOWN AND AKRON...AND NEAR THE TAPPAN RESEVOIR AND COLUMBUS AREAS. ALL MOVING EASTSOUTHEAST AT 25 MILES AN HOUR. IF YOURE OUT THIS EVENING...BE ON THE LOOKOUT FOR THREATENING WEATHER...KNOW WHERE YOU CAN GO FOR SAFE SHELTER...AND KEEP TUNED FOR ADDITIONAL ADVISORIES AND UPDATES. GIORDANO/HIGGINS/REHAK/NOUHAN
Special weather statement, Jun 8, 10:52 PM EDT, 29 minutes before
PAZ001>006-013>015-WVZ001-090800- SPECIAL WEATHER AND FLOOD STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 1040 PM EDT FRI JUN 8 1990 ...TORNADO WATCH TIL 3 AM FOR THE WEST VIRGINIA NORTHERN PANHANDLE AND FOR WESTERN PENNSYLVANIA SOUTH OF PITTSBURGH AND ALTOONA... ...FLOOD WATCH FOR THE WEST VIRGINIA PANHANDLE AND ALL OF WESTERN PENNSYLVANIA TIL 4 AM... THE WEST VIRGINIA NORTHERN PANHANDLE AND WESTERN PENNSYLVANIA... PARTICULARLY THOSE AREAS SOUTH OF INTERSTATE 80...WILL CONTINUE TO BE PLAGUED OVERNIGHT BY THUNDERSTORMS WITH HEAVY DOWNPOURS AND STRONG WIND GUSTS. THE DOWNPOURS MAY BE HEAVY ENOUGH TO CAUSE FLOODING ALONG SMALL STREAMS AND WHERE THERES POOR DRAINAGE. THE WIND GUSTS MAY BE DAMAGING WITH EVEN A TORNADO POSSIBLE. IF YOU LIVE IN AN AREA PRONE TO FLOODING FROM SMALL STREAMS AND POOR DRAINAGE...WATCH OUT FOR REPEATED HEAVY DOWNPOURS AND RISING WATER. BE READY TO MOVE TO HIGHER GROUND IF NEEDED. WHENEVER THREATENING WEATHER APPROACHES...TAKE SHELTER INDOORS. LIGHTNING KILLS AS OFTEN AS STRONG WIND AND FLOODING. HIGH HUMIDITY AND A STALLED FRONT ARE THE CAUSE OF TONIGHTS DANGEROUS THUNDERSTORMS. STORMS FROM OHIO WILL CONTINUE TO MOVE INTO WEST VIRGINIA AND PENNSYLVANIA OVERNIGHT. THERE MAY BE A BREAK SATURDAY MORNING...BUT STRONG THUNDERSTORMS MAY REDEVELOP SATURDAY AFTERNOON AND EVENING WHEN A SECOND FRONT COMING FROM WISCONSIN MOVES THE STALLED FRONT OUT. GIORDANO/STEWART/HIGGINS/ALESSI ~
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 8:29 PM EDT | Tornado Warning | PBZ | Somerset | 61 min |
| Jun 8, 9:29 PM EDT | Tornado Warning | PBZ | Bedford | 61 min |
| Jun 8, 11:21 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Armstrong, Butler | 2 hr |
| Jun 9, 12:10 AM EDT | Flash Flood Warning | PBZ | Clearfield, Indiana | 80 min |
| Jun 9, 12:10 AM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Indiana | 80 min |
| Jun 9, 1:16 AM EDT | Flash Flood Warning | PBZ | Clearfield | 2 hr |
| Jun 9, 6:00 AM EDT | Severe Thunderstorm Warning | PBZ | Washington | 60 min |
| Jun 9, 6:15 AM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver, Butler | 60 min |
| Jun 9, 6:26 AM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 64 min |
| Jun 9, 7:51 AM EDT | Severe Thunderstorm Warning | PBZ | Cambria, Somerset | 39 min |
Nearby
Flash Flood Warnings in Pennsylvania, 1990Every flash flood warning in 1990
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.