Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 46, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jul 12, 1990, 9:20 AM EDT for Beaver County, Butler County, Pennsylvania. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Jul 12, 1990, 9:20 AM EDT (13:20 UTC)
- Expired
- Jul 12, 1990, 1:00 PM EDT
- In force
- 4 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Beaver County, PA, Butler 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, 1.3 hours before the alert went out and 43 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
- 89 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 567 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- 94 m²/s²
- 0-3 km storm-relative helicity
- 89 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 121322 FFWPIT PAC007-019-121700- BULLETIN BROADCAST IMMEDIATELY FLOOD WARNING FOR STREAMS AND CREEKS NATIONAL WEATHER SERVICE PITTSBURGH PA 920AM EDT THU JUL 12 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A FLOOD WARNING FOR STREAMS AND CREEKS UNTIL 100PM EDT FOR THESE COUNTIES IN WESTERN PENNSYLVANIA... BEAVER COUNTY...BUTLER COUNTY... AT 910AM WEATHER SERVICE RADAR INDICATED HEAVY RAINS MOVING NORTHEASTWARD INTO BEAVER COUNTY AND TOWARD BUTLER COUNTY. THE SOILS ARE QUITE SATURATED AND RAINFALL OVER THE LAST 24 HOURS IN THESE COUNTIES RANGED FROM 1.0 TO 2.0 INCHES. STREAMS AND CREEKS IN THESE COUNTIES ARE REPORTED QUITE HIGH AND NEAR BANKFUL. THE HEAVY RAINS MOVING ACROSS THESE TWO COUNTIES WILL RESULT IN FLOODING THIS MORNING. A FLOOD WARNING FOR STREAMS AND CREEKS MEANS FLOODING IS IMMINENT OR IN PROGRESS. IF YOU GET ANY INDICATION THAT FLOOD WATERS ARE APPROACHING..MOVE TO HIGHER GROUND IMMEDIATELY. DO NOT DRIVE THROUGH FLOODED AREAS. FURTHER FLOOD WARNINGS FOR STREAMS AND CREEKS MAY HAVE TO BE ISSUED FOR OTHER COUNTIES IN WESTERN PENNSYLVANIA THIS MORNING AND AFTERNOON. A FLOOD WATCH FOR STREAMS AND CREEKS HAS BEEN EXTENDED TIL 10PM TONIGHT AND IN AREAL COVERAGE TO INCLUDE ALL OF WESTERN PENNSYLVANIA EXCEPT THE ERIE LAKESHORE AND CLINTON COUNTY IN THE NORTH CENTRAL MOUNTAINS OF WESTERN PENNSYLVANIA. THE FLOOD WATCH ALSO INCLUDES THE NORTHERN WEST VIRGINIA PANHANDLE FOR STREAMS AND CREEKS TIL 10PM TONIGHT ALSO. STAY TUNED TO NOAA WEATHER RADIO FOR FURTHER WARNING AND STATEMENTS THROUGHOUT THE DAY AND AND TONIGHT. SISK/HIGGINS/ALESSI/RUMBURG
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 10:35 AM EDT | Flash Flood Warning | PBZ | Armstrong, Clarion, Jefferson | 3 hr |
| Jul 12, 12:08 PM EDT | Flash Flood Warning | PBZ | Indiana | 112 min |
| Jul 12, 12:40 PM EDT | Flash Flood Warning | PBZ | Armstrong, Beaver, Butler, Clarion | 3 hr |
| Jul 12, 12:40 PM EDT | Flash Flood Warning | PBZ | Jefferson | 3 hr |
| Jul 12, 12:40 PM EDT | Flash Flood Warning | PBZ | Allegheny | 2 hr |
| Jul 12, 12:40 PM EDT | Flash Flood Warning | PBZ | Clearfield | 2 hr |
| Jul 12, 3:50 PM EDT | Flash Flood Warning | PBZ | Bedford, Cambria | 2 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.