Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 38, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jul 9, 1990, 3:00 PM EDT for Armstrong County, Butler County, Pennsylvania. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Jul 9, 1990, 3:00 PM EDT (19:00 UTC)
- Expired
- Jul 9, 1990, 5:00 PM EDT
- In force
- 2 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Armstrong 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, 7.0 hours before the alert went out and 61 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
- 1312 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1037 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 143 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.6
- Supercell composite
- 5.3
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KPIT 091908 FFWPIT PAC005-019-092100- BULLETIN - EBS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 300 PM EDT MON JUL 9 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 500 PM EDT FOR THE FOLLOWING LOCATIONS... IN WEST PENNSYLVANIA ...ARMSTRONG COUNTY...BUTLER COUNTY AT 300 PM WEATHER RADAR SHOWED THUNDERSTORMS PRODUCING TORRENTIAL RAINS OVER ARMSTRONG AND BUTLER COUNTIES. THE RAIN WILL BE HEAVY ENOUGH TO CAUSE FLOODING OVER SATURATED GROUND FROM PREVIOUS RAINS OF THIS AFTERNOON. NEVER DRIVE INTO A FLOODED AREA. A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS IMMINENT. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT'S IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 12:54 PM EDT | Flash Flood Warning | PBZ | Clarion, Jefferson | 2 hr |
| Jul 9, 12:54 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 2 hr |
| Jul 9, 1:12 PM EDT | Flash Flood Warning | PBZ | Clearfield | 108 min |
| Jul 9, 1:12 PM EDT | Flash Flood Warning | PBZ | Armstrong | 108 min |
| Jul 9, 1:21 PM EDT | Severe Thunderstorm Warning | PBZ | Clearfield | 99 min |
| Jul 9, 1:21 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 99 min |
| Jul 9, 1:35 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Butler | 85 min |
| Jul 9, 2:09 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny | 81 min |
| Jul 9, 3:01 PM EDT | Flash Flood Warning | PBZ | Allegheny, Beaver | 89 min |
| Jul 9, 3:01 PM EDT | Severe Thunderstorm Warning | PBZ | Allegheny, Beaver | 89 min |
| Jul 9, 3:50 PM EDT | Flash Flood Warning | PBZ | Washington, Westmoreland | 100 min |
| Jul 9, 3:50 PM EDT | Severe Thunderstorm Warning | PBZ | Washington, Westmoreland | 100 min |
| Jul 9, 4:36 PM EDT | Flash Flood Warning | PBZ | Allegheny, Armstrong, Beaver | 114 min |
| Jul 9, 4:57 PM EDT | Severe Thunderstorm Warning | PBZ | Somerset | 48 min |
| Jul 9, 6:29 PM EDT | Flash Flood Warning | PBZ | Armstrong | 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.