Alert archive / Pennsylvania / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 33, NWS State College, PA
NWS State College, PA issued this severe thunderstorm warning at May 24, 1999, 2:03 PM EDT for Lycoming County, Tioga County, Pennsylvania. It was in force for 57 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
- May 24, 1999, 2:03 PM EDT (18:03 UTC)
- Expired
- May 24, 1999, 3:00 PM EDT
- In force
- 57 min
- Issued by
- NWS State College, PA
- Area
- Whole counties
Counties Lycoming County, PA, Tioga County, PA
The radar
The State College radar (KCCX), 100 km from the middle of the area, began a volume at 18:04 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 24, 2:43 PM EDT | Thunderstorm Wind | Williamsport, PA | Trees and wires were down on vehicles on Depot Street in Williamsport. |
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 nearest sounding before it
Phillips Aaf/Abe, MD (KAPG), launched 12:00Z, 6.1 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
- 61 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1309 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 173 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 |
|---|---|---|---|---|
| May 24, 12:04 PM EDT | Severe Thunderstorm Warning | CTP | Cambria, Clearfield | 56 min |
| May 24, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Cameron, Clinton | 62 min |
| May 24, 12:43 PM EDT | Severe Thunderstorm Warning | CTP | Centre | 62 min |
| May 24, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Columbia, Sullivan | 50 min |
| May 24, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Northumberland, Snyder, Union | 50 min |
| May 24, 2:40 PM EDT | Severe Thunderstorm Warning | CTP | Montour | 50 min |
Nearby
Severe Thunderstorm Warnings in Pennsylvania, 1999Every severe thunderstorm warning in 1999
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; radar from the NEXRAD Level II archive.