Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 359
The Storm Prediction Center issued this severe thunderstorm watch at May 31, 2002, 2:45 PM EDT for 33 counties in Pennsylvania. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- May 31, 2002, 2:45 PM EDT (18:45 UTC)
- Expired
- May 31, 2002, 8:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 33 counties
Armstrong County, PA, Bradford County, PA, Butler County, PA, Cameron County, PA, Carbon County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Crawford County, PA, Elk County, PA, Forest County, PA, Jefferson County, PA, Lackawanna County, PA, Lawrence County, PA, Luzerne County, PA, Lycoming County, PA, McKean County, PA, Mercer County, PA, Monroe County, PA, Montour County, PA, Northampton County, PA, Northumberland County, PA, Potter County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Venango County, PA, Warren County, PA, Wayne County, PA, Wyoming County, PA
The radar
The State College radar (KCCX), 69 km from the middle of the area, began a volume at 18:46 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.
Warnings issued inside it
24 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 3:21 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 54 min |
| May 31, 3:30 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming, Tioga | 30 min |
| May 31, 3:39 PM EDT | Severe Thunderstorm Warning | CTP | Sullivan | 21 min |
| May 31, 3:57 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 48 min |
| May 31, 4:08 PM EDT | Severe Thunderstorm Warning | CTP | Elk | 37 min |
| May 31, 4:13 PM EDT | Severe Thunderstorm Warning | BGM | Luzerne | 47 min |
| May 31, 4:15 PM EDT | Severe Thunderstorm Warning | PBZ | Mercer | 45 min |
| May 31, 4:17 PM EDT | Severe Thunderstorm Warning | BGM | Susquehanna | 58 min |
| May 31, 4:22 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 53 min |
| May 31, 4:28 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 62 min |
| May 31, 4:31 PM EDT | Severe Thunderstorm Warning | BGM | Wayne | 59 min |
| May 31, 4:35 PM EDT | Severe Thunderstorm Warning | CTP | Clearfield | 40 min |
| May 31, 4:37 PM EDT | Tornado Warning | BGM | Wayne | 23 min |
| May 31, 4:44 PM EDT | Severe Thunderstorm Warning | CTP | Clinton | 46 min |
| May 31, 5:15 PM EDT | Severe Thunderstorm Warning | CTP | Lycoming | 45 min |
| May 31, 5:18 PM EDT | Severe Thunderstorm Warning | PBZ | Jefferson | 57 min |
| May 31, 5:18 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 27 min |
| May 31, 5:28 PM EDT | Severe Thunderstorm Warning | CTP | Centre, Clearfield | 62 min |
| May 31, 5:33 PM EDT | Severe Thunderstorm Warning | PBZ | Lawrence | 57 min |
| May 31, 5:43 PM EDT | Severe Thunderstorm Warning | PHI | Monroe | 47 min |
| May 31, 6:01 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 59 min |
| May 31, 6:07 PM EDT | Severe Thunderstorm Warning | BGM | Lackawanna, Wayne | 38 min |
| May 31, 6:09 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 51 min |
| May 31, 7:30 PM EDT | Severe Thunderstorm Warning | PHI | Northampton | 45 min |
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 6.8 hours before the alert went out and 164 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
- 728 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 961 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 240 m²/s²
- 0-3 km storm-relative helicity
- 247 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 3.9
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 31, 5:00 PM EDT | Severe Thunderstorm Watch | SPC | Allegheny, Armstrong, Beaver, Fayette, Greene, Indiana and 3 more | 6 hr |
| May 31, 5:15 PM EDT | Severe Thunderstorm Watch | SPC | Adams, Bedford, Berks, Blair, Bucks, Cambria and 26 more | 6 hr |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 2002Every severe thunderstorm watch in 2002
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; radar from the NEXRAD Level II archive.