Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 47, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jul 12, 1990, 10:35 AM EDT for Armstrong County, Clarion County, Jefferson County, Pennsylvania. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jul 12, 1990, 10:35 AM EDT (14:35 UTC)
- Expired
- Jul 12, 1990, 2:00 PM EDT
- In force
- 3 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Armstrong County, PA, Clarion County, PA, Jefferson 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, 2.6 hours before the alert went out and 98 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 121437 FFWPIT PAC031-065-005-121800- BULLETIN BROADCAST IMMEDIATELY FLOOD WARNING FOR STREAMS AND CREEKS NATIONAL WEATHER SERVICE PITTSBURGH PA 1035 AM EDT THU JUL 12 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A FLOOD WARNING FOR STREAMS AND CREEKS UNTIL 200PM EDT FOR THESE COUNTIES IN WESTERN PENNSYLVANIA... CLARION COUNTY...JEFFERSON COUNTY...ARMSTRONG COUNTY AT 1030AM WEATHER SERVICE RADAR INDICATED HEAVY RAINS MOVING NORTHEASTWARD TOWARD AND ACROSS THESE THREE COUNTIES. THE SOILS ARE QUITE SATURATED AND RAINFALL OVER THE LAST 24 HOURS IN THESE COUNTIES RANGED FROM 1.5 TO 2.3 INCHES. STREAMS AND CREEKS IN THESE COUNTIES ARE REPORTED QUITE HIGH AND NEAR BANKFUL. THE HEAVY RAINS MOVING ACROSS THESE THREE COUNTIES WILL RESULT IN FLOODING THIS MORNING. AT THE PRESENT TIME IT WOULD APPEAR THAT SOUTHERN JEFFERSON AND SOUTHERN CLARION COUNTIES HAVE THE HIGHEST POTENTIAL FOR FLOODING AS WELL AS THE NORTHERN HALF OF ARMSTRONG COUNTY. ROADS ARE CLOSED IN BUTLER COUNTY DUE TO FLOODING IN THE TOWNSHIPS OF LANCASTER...CENTER AND FORWARD. A FLOOD WARNING ALSO CONTINUES UNTIL 1PM FOR BEAVER AND BUTLER COUNTIES. ..AND UNTIL 2PM FOR LAWRENCE COUNTY. 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 MAYb HAVE TO BE ISSUED FOR OTHER COUNTIES IN WESTERN PENNSYLVANIA THIS MORNING AND AFTERNOON. A FLOOD WATCH IS IN EFFECT FOR MOST OF WESTERN PENNSYLVANIA AND THE NORTHERN PANHANDLE OF WEST VIRGINIA UNTIL 10 PM. SISK/HIGGINS/ALESSI/ROSSI-DRAKE
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 9:20 AM EDT | Flash Flood Warning | PBZ | Beaver, Butler | 4 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.