Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 30, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jun 30, 1990, 11:59 PM EDT for Fayette County, Pennsylvania. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jun 30, 1990, 11:59 PM EDT (03:59 UTC)
- Expired
- Jul 1, 1990, 4:00 AM EDT
- In force
- 4 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Fayette 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, 4.0 hours before the alert went out and 67 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
- 1515 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1023 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 58 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.3
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KPIT 010405
FFWPIT
PAC051-010800-
BULLETIN - EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PITTSBURGH PA
1159 PM EDT SAT JUN 30 1990
THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS EXTENDED THE
FLASH FLOOD WARNING EFFECTIVE UNTIL 400 AM EDT
FOR PEOPLE IN THE FOLLOWING COUNTY...
IN WEST PENNSYLVANIA
...FAYETTE
THERE IS ALSO A FLASH FLOOD WATCH FOR SOMERSET COUNTY TIL 4 AM.
THUNDERSTORMS WITH HEAVY DOWNPOURS WILL CONTINUE TO MOVE ACROSS
FAYETTE AND SOMERSET COUNTIES EARLY THIS SUNDAY MORNING. THE FLOODING
ALREADY IN FAYETTE COUNTY CAN GET WORSE. FLOODING MAY BEGIN IN
SOMERSET COUNTY...PARTICULARLY THE SOUTH.
IF YOU ARE IN AN AREA PRONE TO FLOODING FROM SMALL STREAMS OR WHERE
DRAINAGE IS POOR...LOOKOUT FOR RISING WATER. BE READY TO HEAD TO
SAFETY ON HIGHER GROUND...BUT DONT GO THROUGH FLOODING TO GET THERE.
NEVER 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. JUST GO STRAIGHT UP 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
Local storm report, Jun 30, 7:51 PM EDT, 4 hours 8 minutes before
STORM REPORT NATIONAL WEATHER SERVICE PITTSBURGH, PA 749 PM EDT SAT JUN 30 1990 PRELIMINARY STORM REPORT WSFO PIT 6/30/90 TIME EVENT LOCATION 1648 G60KTS BVI (BEAVER CNTY ARPT) 1710 POWER LINES DOWN BADEN (BEAVER CNTY) 1738 11/2A ALIQUIPPA (BEAVER CNTY) 1740 11/4A ALIQUIPPA (BEAVER CNTY) 1740 13/4A WSFO PIT (ALLEGHENY CNTY) 1750 POWER LINES DOWN MONACA (BEAVER CNTY) 1755 11/2A CORAOPOLIS (ALLEGHENY CNTY) 1800 3/4A 8 MILES NW BUTLER (BUTLER CNTY) 1809 1A CARNEGIE (ALLEGHENY CNTY) 1844 1A IMPERIAL (ALLEGHENY CNTY) 1917 3/4A PERRYOPOLIS (FAYETTE) 1930 1A OAKMONT (ALLEGHENY)
Local storm report, Jun 30, 10:45 PM EDT, 1 hour 14 minutes before
STORM REPORT
NATIONAL WEATHER SERVICE PITTSBURGH, PA
1045 PM EDT SAT JUN 30 1990
TIME EVENT LOCATION COUNTY
1648 G60KTS BVI BEAVER ARPT
1710 POWER LINES DOWN BADEN BEAVER
1738 1.5 A ALIQUIPPA BEAVER
1740 1.5 A ALIQUIPPA BEAVER
1740 1.5 A WSFO PIT ALLEGHENY
1750 POWER LINES DOWN MONACA BEAVER
1755 1.50 A CORAOPOLIS ALLEGHENY
1800 .75 A 8 MILES NW BUTLER BUTLER
1809 1.00 A CARNEGIE ALLEGHENY
1844 1.00 A IMPERIAL ALLEGHENY
1917 .75 A PERRYOPOLIS FAYETTE
1930 1.00 A OAKMONT ALLEGHENY
1935 .75 A PENN HILLS ALLEGHENY
1955 PSBL TORNADO 6ESE WASHINGTON WASHINGTON
HOUSE DESTROYED
2040 1.00 A 4 N BROWNSVILLE FAYETTE
2055 1.75 A UNIONTOWN FAYETTE
2115 1.00 A CHALKL HILLS FAYETTE
2125 1.00 A CONNELLSVILLE FAYETTE
2140 1.00 A CONNELLSVILLE FAYETTEThe office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 8:27 PM EDT | Flash Flood Warning | PBZ | Somerset | 33 min |
| Jun 30, 8:27 PM EDT | Flash Flood Warning | PBZ | Allegheny | 33 min |
| Jun 30, 8:59 PM EDT | Flash Flood Warning | PBZ | Clearfield, Indiana, Jefferson | 61 min |
| Jun 30, 8:59 PM EDT | Flash Flood Warning | PBZ | Cambria, Somerset, Westmoreland | 61 min |
| Jun 30, 8:59 PM EDT | Flash Flood Warning | PBZ | Fayette | 61 min |
| Jun 30, 9:36 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 69 min |
| Jun 30, 9:54 PM EDT | Flash Flood Warning | PBZ | Clearfield, Jefferson | 66 min |
| Jun 30, 9:54 PM EDT | Flash Flood Warning | PBZ | Fayette | 66 min |
| Jun 30, 10:45 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield, Indiana | 60 min |
| Jun 30, 10:57 PM EDT | Flash Flood Warning | PBZ | Fayette | 2 hr |
| Jul 1, 11:27 AM EDT | Severe Thunderstorm Warning | PBZ | Fayette | 63 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.