Alert archive / Pennsylvania / Flash Flood Warnings in 1990
Flash Flood Warning 37, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this flash flood warning at Jul 9, 1990, 1:12 PM EDT for Armstrong County, Pennsylvania. It was in force for 108 min.
The area
The counties it named.
The facts
- Issued
- Jul 9, 1990, 1:12 PM EDT (17:12 UTC)
- Expired
- Jul 9, 1990, 3:00 PM EDT
- In force
- 108 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Armstrong 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, 5.2 hours before the alert went out and 70 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 091725 RRA FFWPIT PAC005-033-091900- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE PITTSBURGH PA 121 PM EDT MON JUL 9 1990 THE NATIONAL WEATHER SERVICE IN PITTSBURGH HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 300 PM EDT FOR THE FOLLOWING LOCATIONS... IN WEST PENNSYLVANIA ...ARMSTRONG COUNTY...CLEARFIELD COUNTY AT 120 PM WEATHER RADAR SHOWED A SEVERE THUNDERSTORM NEAR DUBOIS AIRPO IT WILL MOVE INTO CLEARFIELD COUNTY SHORTLY. IT PRODUCED HAIL AS IS MOVED THROUGH THE DUBOIS AIRPORT AREA. ANOTHER SEVERE STORM WAS NEAR PARKER CITY...IT WILL MOVE TO NEAR KITTANNING SHORTLY. IN ADDITION VERY HEAVY RAINS FROM THESE STORMS WILL LIKELY PRODUCE FLA FLOODING. NEVER DRIVE THROUGH A FLOODED AREA. SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 55 MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DON'T DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCE!SS OF 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
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, 1:21 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, 3:00 PM EDT | Flash Flood Warning | PBZ | Armstrong, Butler | 2 hr |
| 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.