Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 50, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Jul 20, 1992, 5:56 PM EDT for 4 counties in Pennsylvania. It was in force for 2 hr. 3 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 20, 1992, 5:56 PM EDT (21:56 UTC)
- Expired
- Jul 20, 1992, 8:00 PM EDT
- In force
- 2 hr
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Armstrong County, PA, Butler County, PA, Clarion County, PA, Jefferson County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 20, 6:02 PM EDT | Tornado F0 | Armstrong, PA | |
| Jul 20, 7:02 PM EDT | Thunderstorm Wind 0 | Clarion, PA | |
| Jul 20, 7:55 PM EDT | Thunderstorm Wind 0 | Butler, PA |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 9.9 hours before the alert went out and 86 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
- 136 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 874 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 101 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 20, 2:07 PM EDT, 3 hours 49 minutes before
PAZ001>006-013>015-WVZ001-210000- SPECIAL WEATHER STATEMENT - SEVERE THUNDERSTORM WATCH TIL 8 PM. NATIONAL WEATHER SERVICE PITTSBURGH PA 210 PM EDT MON JUL 20 1992 THE NATIONAL SEVERE STORMS FORECAST CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH UNTIL 800 PM FOR THE FOLLOWING COUNTIES IN WESTERN PENNSYLVANIA ALLEGHENY...ARMSTRONG...BEAVER...BUTLER...CAMERON...CLARION... CLEARFIELD...CLINTON...CRAWFORD...ELK...ERIE...FOREST...INDIANA... JEFFERSON...LAWRENCE...MCKEAN...MERCER...POTTER...VENANGO...WARREN... WASHINGTON AND WESTMORELAND. LARGE HAIL...DANGEROUS LIGHTNING AND DAMAGING THUNDERSTORM WINDS ARE POSSIBLE IN THESE AREAS. HEAVY DOWNPOURS MAY ALSO CAUSE POOR DRAINAGE AND LOW LAND FLOODING. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. STAIRS/HIGGINS
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 4:39 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion, Jefferson | 66 min |
| Jul 20, 5:00 PM EDT | Flash Flood Warning | PBZ | Butler | 3 hr |
| Jul 20, 5:13 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 62 min |
| Jul 20, 5:56 PM EDT | Flash Flood Warning | PBZ | Armstrong, Beaver, Butler, Clarion | 2 hr |
| Jul 20, 5:56 PM EDT | Flash Flood Warning | PBZ | Jefferson | 2 hr |
| Jul 20, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 2 hr |
| Jul 20, 6:32 PM EDT | Flash Flood Warning | PBZ | Indiana | 58 min |
| Jul 20, 6:32 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 58 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1992Every severe thunderstorm warning in 1992
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.