Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 7, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jun 9, 1990, 1:16 AM EDT for Clearfield County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jun 9, 1990, 1:16 AM EDT (05:16 UTC)
- Expired
- Jun 9, 1990, 3:30 AM EDT
- In force
- 2 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Clearfield 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, 5.3 hours before the alert went out and 152 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 090522 FFWPIT PAC033-090730- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 116 AM EDT SAT JUN 9 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS EXTENDED A FLASH FLOOD WARNING EFFECTIVE UNTIL 330 AM EDT FOR THE FOLLOWING LOCATION... IN WEST PENNSYLVANIA ...CLEARFIELD COUNTY WEATHER SERVICE RADAR STILL SHOWED STRONG THUNDERSTORMS WITH HEAVY RAIN OVER CLEARFIELD COUNTY. THESE STORMS CAN CAUSE RAPID FLOODING OF SMALL STREAMS AND CREEKS. THE FLASH FLOOD WARNING FOR THE OTHER FOUR COUNTIES HAS EXPIRED. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED...ACT QUICKLY. MOVE UP TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO >CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND.
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, 7:41 PM EDT, 5 hours 35 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, 2 hours 24 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 ~
Special weather statement, Jun 9, 12:49 AM EDT, 27 minutes before
PAZ001>006-013>015-WVZ001-090900- SPECIAL WEATHER AND FLOOD STATEMENT NATIONAL WEATHER SERVICE PITTSBURGH PA 1245 AM EDT SAT JUN 9 1990 ...FLASH FLOOD WARNING AND SEVERE THUNDERSTORM WARNING TIL 130 AM FOR CLEARFIELD INDIANA BUTLER ARMSTRONG AND ALLEGHENY COUNTIES... ...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... JUST BEFORE 1 AM...THE WORST STORMS WERE OVER INDIANA CLEARFIELD AND CENTRE COUNTIES IN THE CENTRAL PENNSYLVANIA MOUNTAINS. REPEATED HEAVY RAIN MAY CAUSE THE RAPID FLOODING OF STREAMS AND CREEKS AND WHERE DRAINAGE IS POOR. THERE WERE ALSO THUNDERSTORMS WITH HEAVY RAIN OVER THE WEST VIRGINIA NORTHERN PANHANDLE AND THE SOUTHWEST PENNSYLVANIA COUNTIES OF GREENE AND WASHINGTON. THESE TOO CAN CAUSE FLOODING. THE RAIN HAS LESSENED OVER ALLEGHENY ARMSTRONG AND BUTLER COUNTIES...BUT RUNOFF FROM THE PREVIOUS HEAVY RAIN CAN STILL CAUSE FLOODING TIL AROUND 130. IN GENERAL THE THREAT OF HIGH WINDS AND LARGE HAIL HAS DIMINISHED...BUT THERES STILL LOTS OF DANGEROUS LIGHTNING WITH THESE STORMS WHICH HAS CAUSED FIRES AND MANY OF THE POWER OUTAGES. GIORDANO/SISK/ALESSI/PALKO/LEONARDON/REHAK
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 | Flash Flood Warning | PBZ | Allegheny, Armstrong, Butler | 2 hr |
| 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, 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.