Alert archive / Pennsylvania / Tornado Warnings in 1991
Tornado Warning 4, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this tornado warning at Jul 7, 1991, 5:04 PM EDT for Greene County, Washington County, Pennsylvania; Marshall County, West Virginia. It was in force for 56 min.
The area
The counties it named.
The facts
- Issued
- Jul 7, 1991, 5:04 PM EDT (21:04 UTC)
- Expired
- Jul 7, 1991, 6:00 PM EDT
- In force
- 56 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Greene County, PA, Washington County, PA, Marshall County, WV
The nearest sounding before it
Washington/Dulle, VA (KIAD), launched 12:00Z, 9.1 hours before the alert went out and 280 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
- 1279 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1270 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 46 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.
The office that day
Everything else NWS Pittsburgh, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 11:12 AM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 63 min |
| Jul 7, 11:21 AM EDT | Severe Thunderstorm Warning | PBZ | Blair, Cambria | 69 min |
| Jul 7, 4:37 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 68 min |
| Jul 7, 4:37 PM EDT | Severe Thunderstorm Warning | PBZ | Greene | 68 min |
| Jul 7, 6:28 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 62 min |
| Jul 7, 7:09 PM EDT | Severe Thunderstorm Warning | PBZ | Washington | 66 min |
| Jul 7, 7:19 PM EDT | Severe Thunderstorm Warning | PBZ | Fayette, Somerset | 56 min |
| Jul 7, 5:04 PM EDT | Tornado Warning | PBZ | Ohio | 56 min |
Nearby
Tornado Warnings in Pennsylvania, 1991Tornado Warnings in West Virginia, 1991Every tornado warning in 1991Tornadoes in 1991
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.