Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 101, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Sep 7, 1990, 9:45 AM EDT for Washington County, Pennsylvania; Brooke County, West Virginia. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Sep 7, 1990, 9:45 AM EDT (13:45 UTC)
- Expired
- Sep 7, 1990, 2:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Washington County, PA, Brooke County, WV
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, 1.8 hours before the alert went out and 33 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- NaN m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 147 m²/s²
- 0-3 km storm-relative helicity
- 159 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPIT 071347 FFWPIT PAC125-WVC009-071800- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 945 AM EDT FRI SEP 7 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS EXTENDED THE FLASH FLOOD WARNING EFFECTIVE UNTIL 200 PM EDT FOR THE FOLLOWING LOCATIONS... IN WEST PENNSYLVANIA ...WASHINGTON COUNTY IN THE WEST VIRGINIA PANHANDLE ...BROOKE COUNTY FLOODING CONTINUES IN BROOKE COUNTY WEST VIRGINIA AND WASHINGTON COUNTY PENNSYLVANIA. NUMEROUS REPORTS OF FLOODING CONTINUE IN FOLLANSBEE WEST VIRGINIA...AS WELL AS IN AVELLA AND BROWNSTOWN PENNSYLVANIA. MAIN STREET IN FOLLANSBEE IS STILL COVERED WITH WATER...WHILE PEOPLE REMAIN EVACUATED ALONG CROSS CREEK IN THE AVELLA PENNSYLVANIA AREA. RAIN WILL CONTINUE FOR THE NEXT SEVERAL HOURS IN THESE AREAS. THE RAIN MAY BE HEAVY AT TIMES ALSO. STAY AWAY FROM FLOODED AREAS! 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.
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 6, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Washington | 78 min |
| Sep 6, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 78 min |
| Sep 6, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Jefferson | 78 min |
| Sep 6, 9:42 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Butler | 78 min |
| Sep 6, 11:00 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Fayette, Washington, Westmoreland | 60 min |
| Sep 7, 12:06 AM EDT | Flash Flood Warning | PBZ | Washington | 4 hr |
| Sep 7, 12:06 AM EDT | Flash Flood Warning | PBZ | Allegheny, Westmoreland | 4 hr |
| Sep 7, 4:00 AM EDT | Flash Flood Warning | PBZ | Washington | 4 hr |
| Sep 7, 7:30 AM EDT | Flash Flood Warning | PBZ | Washington | 3 hr |
| Sep 7, 1:50 PM EDT | Flash Flood Warning | PBZ | Washington | 3 hr |
Nearby
Flash Flood Warnings in Pennsylvania, 1990Flash Flood Warnings in West Virginia, 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.