Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1998
Severe Thunderstorm Warning 347, NWS Pittsburgh, PA
NWS Pittsburgh, PA issued this severe thunderstorm warning at Sep 27, 1998, 4:25 PM EDT for Mercer County, Pennsylvania. It was in force for 40 min. 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
- Sep 27, 1998, 4:25 PM EDT (20:25 UTC)
- Expired
- Sep 27, 1998, 5:05 PM EDT
- In force
- 40 min
- Issued by
- NWS Pittsburgh, PA
- Area
- Whole counties
County Mercer County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Sep 27, 4:30 PM EDT | Thunderstorm Wind | Mercer, PA | Thunderstorm winds blew a tree down onto a house. |
| Sep 27, 4:50 PM EDT | Thunderstorm Wind | Grove City, PA | Thunderstorm winds downed several trees, some onto powerlines. One tree fell onto a porch. |
| Sep 27, 4:50 PM EDT | Hail 0.75 | Grove City, 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Sep 27, 4:15 PM EDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 8.4 hours before the alert went out and 100 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1444 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 99 m²/s²
- 0-3 km storm-relative helicity
- 27 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 |
|---|---|---|---|---|
| Sep 27, 5:49 PM EDT | Severe Thunderstorm Warning | PBZ | Coshocton | 31 min |
| Sep 27, 6:03 PM EDT | Severe Thunderstorm Warning | PBZ | Muskingum | 42 min |
| Sep 27, 6:20 PM EDT | Severe Thunderstorm Warning | PBZ | Guernsey | 45 min |
| Sep 27, 3:52 PM EDT | Severe Thunderstorm Warning | PBZ | Clarion | 58 min |
| Sep 27, 4:13 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 42 min |
| Sep 27, 4:50 PM EDT | Severe Thunderstorm Warning | PBZ | Butler, Venango | 45 min |
| Sep 27, 5:16 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 44 min |
| Sep 27, 5:37 PM EDT | Tornado Warning | PBZ | Armstrong, Clarion | 43 min |
| Sep 27, 5:58 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 57 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1998Every severe thunderstorm warning in 1998
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.