Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 75, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jul 15, 1990, 2:30 PM EDT for Indiana County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jul 15, 1990, 2:30 PM EDT (18:30 UTC)
- Expired
- Jul 15, 1990, 4:30 PM EDT
- In force
- 2 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Indiana 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, 6.5 hours before the alert went out and 90 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 151832 FFWPIT PAC063-111-152030- BULLETIN - BROADCAST IMMEDIATELY FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 230 PM EDT SUN JUL 15 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A FLOOD WARNING EFFECTIVE UNTIL 430 PM EDT FOR THE FOLLOWING LOCATIONS... IN WESTERN PENNSYLVANIA ...INDIANA COUNTY...SOMERSET COUNTY AT 230 PM WEATHER RADAR SHOWED A LINE OF THUNDERSTORMS FROM KITTANING IN ARMSTRONG COUNTY SOUTHWARD ACROSS FAYETTE COUNTY INTO WEST VIRGINIA. THESE THUNDERSTORMS ARE PRODUCING VERY HEAVY DOWNPOURS AND WILL CAUSE FLOODING AS THEY MOVE NORTHEAST INTO INDIANA AND SOMERSET COUNTIES. FLOODING OF STREAMS AND BASEMENTS HAS ALREADY BEEN REPORTED IN FAYETTE COUNTY IN BROWNSVILLE AND FAIRCHANCE. JACOBS CREEK IN WESTMORELAND COUNTY IS REPORTED OUT OF ITS BANKS. 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 |
|---|---|---|---|---|
| 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, 1:00 PM EDT | Flash Flood Warning | PBZ | Westmoreland | 2 hr |
| Jul 15, 2:30 PM EDT | Flash Flood Warning | PBZ | Somerset | 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.