Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1991
Severe Thunderstorm Warning 46, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at Jul 23, 1991, 3:51 PM EDT for Montour County, Northumberland County, Pennsylvania. It was in force for 54 min. 1 report 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 23, 1991, 3:51 PM EDT (19:51 UTC)
- Expired
- Jul 23, 1991, 4:45 PM EDT
- In force
- 54 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
Counties Montour County, PA, Northumberland County, PA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 23, 4:00 PM EDT | Thunderstorm Wind 0 | Northumberland, 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
Atlantic City In, NJ (KACY), launched 12:00Z, 7.9 hours before the alert went out and 249 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
- 835 J/kg
- Mixed-layer CIN
- -143 J/kg
- Mixed-layer LCL
- 1396 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 77 m²/s²
- 0-3 km storm-relative helicity
- 83 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 State College, PA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 1:05 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 55 min |
| Jul 23, 1:33 PM EDT | Severe Thunderstorm Warning | CTP | Bradford | 57 min |
| Jul 23, 2:08 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 67 min |
| Jul 23, 2:37 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 68 min |
| Jul 23, 3:09 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 66 min |
| Jul 23, 3:14 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 46 min |
| Jul 23, 3:32 PM EDT | Severe Thunderstorm Warning | CTP | Carbon | 43 min |
| Jul 23, 3:43 PM EDT | Severe Thunderstorm Warning | CTP | Huntingdon, Mifflin | 62 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1991Every severe thunderstorm warning 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.