Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 111, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Aug 16, 1997, 7:08 PM EDT for Clarion County, Jefferson County, Pennsylvania. It was in force for 67 min. 2 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
- Aug 16, 1997, 7:08 PM EDT (23:08 UTC)
- Expired
- Aug 16, 1997, 8:15 PM EDT
- In force
- 67 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
Counties Clarion County, PA, Jefferson County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 16, 7:15 PM EDT | Thunderstorm Wind | Brockway, PA | Several trees and power lines were downed by thunderstorm winds. |
| Aug 16, 7:30 PM EDT | Thunderstorm Wind | West Freedom, PA | Several trees were downed by thunderstorm winds. |
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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 16, 4:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 11.1 hours before the alert went out and 112 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
- 2423 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 591 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 111 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.2
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 |
|---|---|---|---|---|
| Aug 16, 3:23 AM EDT | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence | 52 min |
| Aug 16, 3:41 AM EDT | Severe Thunderstorm Warning | PBZ | Butler | 49 min |
| Aug 16, 11:39 AM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 66 min |
| Aug 16, 12:08 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 67 min |
| Aug 16, 12:10 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 65 min |
| Aug 16, 12:35 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 55 min |
| Aug 16, 12:37 PM EDT | Severe Thunderstorm Warning | PBZ | Forest | 68 min |
| Aug 16, 12:40 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 65 min |
| Aug 16, 12:46 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 29 min |
| Aug 16, 12:48 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 57 min |
| Aug 16, 1:38 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 52 min |
| Aug 16, 5:03 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 57 min |
| Aug 16, 5:18 PM EDT | Tornado Warning | PBZ | Mercer | 57 min |
| Aug 16, 5:46 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 59 min |
| Aug 16, 6:00 PM EDT | Tornado Warning | PBZ | Mercer | 60 min |
| Aug 16, 6:13 PM EDT | Flash Flood Warning | PBZ | Mercer | 4 hr |
| Aug 16, 6:32 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Venango | 58 min |
| Aug 16, 6:40 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 65 min |
| Aug 16, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 57 min |
| Aug 16, 7:03 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 57 min |
| Aug 16, 7:35 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Lawrence | 55 min |
| Aug 16, 7:42 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 63 min |
| Aug 16, 2:23 AM EDT | Severe Thunderstorm Warning | PBZ | Columbiana | 52 min |
| Aug 16, 4:38 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton | 67 min |
| Aug 16, 7:22 PM EDT | Severe Thunderstorm Warning | PBZ | Columbiana | 68 min |
| Aug 16, 7:51 PM EDT | Severe Thunderstorm Warning | PBZ | Carroll | 69 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1997Every severe thunderstorm warning in 1997
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.