Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 73, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jul 15, 1990, 1:00 PM EDT for Westmoreland County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jul 15, 1990, 1:00 PM EDT (17:00 UTC)
- Expired
- Jul 15, 1990, 3:00 PM EDT
- In force
- 2 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County 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, 5.0 hours before the alert went out and 55 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
- 31 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 687 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -39 m²/s²
- 0-3 km storm-relative helicity
- 11 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPIT 151703 FFWPIT PAC129-151900- BULLETIN BROADCAST IMMEDIATELY FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 100PM EDT SUN JUL 15 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A FLOOD WARNING UNTIL 300PM EDT FOR THIS COUNTY IN WESTERN PENNSYLVANIA... WESTMORELAND. A THUNDERSTORM WITH HEAVY DOWNPOURS IS MOVING INTO THIS COUNTY FROM THE FAYETTE COUNTY. RAINFALL AMOUNTS FROM THIS STORM DROPPED OVER HALF AN INCH OF RAINFALL IN 10 MINUTES AS IT WENT THROUGH BROWNSVILLE IN FAYETTE COUNTY. THIS WILL BE ENOUGH TO CAUSE FLOODING IN BOTH FAYETTE AND WESTMORELAND COUNTY. A FLOOD WARNING CONTINUES IN EFFECT UNTIL 3 PM FOR FAYETTE COUNTY. THE FLASH FLOOD WARNING FOR CRAWFORD...WARREN AND VENANGO COUNTIES HAS BE ALLOWED TO EXPIRE AT 1PM. STREAMS AND CREEKS ARE REPORTED TO BE BACK IN THEIR BANKS AT THIS TIME. A FLOOD WATCH CONTINUES IN EFFECT FOR ALL OF WESTERN PENNSYLVANIA AND THE NORTHERN PANHANDLE OF WEST VIRGINIA UNTIL 4PM. REED/HIGGINS/ALESSI
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 14, 11:13 PM EDT | Flash Flood Warning | PBZ | Beaver, Washington | 5 hr |
| Jul 14, 11:13 PM EDT | Flash Flood Warning | PBZ | Greene | 5 hr |
| Jul 15, 2:45 AM EDT | Flash Flood Warning | PBZ | Beaver, Washington | 5 hr |
| Jul 15, 2:45 AM EDT | Flash Flood Warning | PBZ | Greene | 5 hr |
| Jul 15, 4:43 AM EDT | Flash Flood Warning | PBZ | Allegheny, Butler | 3 hr |
| Jul 15, 7:08 AM EDT | Flash Flood Warning | PBZ | Butler | 3 hr |
| Jul 15, 12:36 PM EDT | Flash Flood Warning | PBZ | Fayette | 2 hr |
| Jul 15, 2:30 PM EDT | Flash Flood Warning | PBZ | Somerset | 2 hr |
| Jul 15, 2:30 PM EDT | Flash Flood Warning | PBZ | Indiana | 2 hr |
| Jul 15, 2:52 PM EDT | Flash Flood Warning | PBZ | Beaver, Butler | 2 hr |
| Jul 15, 3:15 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 75 min |
| Jul 15, 3:50 PM EDT | Flash Flood Warning | PBZ | Bedford, Cambria | 2 hr |
| Jul 15, 4:17 PM EDT | Flash Flood Warning | PBZ | Blair, Clearfield | 3 hr |
| Jul 15, 4:53 PM EDT | Flash Flood Warning | PBZ | Beaver | 3 hr |
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.