Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2002
Severe Thunderstorm Watch 20
The Storm Prediction Center issued this severe thunderstorm watch at Mar 9, 2002, 5:15 PM EST for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 9, 2002, 5:15 PM EST (22:15 UTC)
- Expired
- Mar 9, 2002, 10:00 PM EST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 47 counties
Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Wyoming County, NY, Ashtabula County, OH, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Harrison County, OH, Jefferson County, OH, Mahoning County, OH, Monroe County, OH, Noble County, OH, Trumbull County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Clarion County, PA, Clearfield County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Fayette County, PA, Forest County, PA, Greene County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, McKean County, PA, Mercer County, PA, Somerset County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Brooke County, WV, Hancock County, WV, Marshall County, WV, Ohio County, WV
The radar
The Pittsburgh radar (KPBZ), 68 km from the middle of the area, began a volume at 22:15 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
6 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 5:34 PM EST | Severe Thunderstorm Warning | PBZ | Belmont, Carroll, Columbiana, Harrison, Jefferson, Monroe and 1 more | 56 min |
| Mar 9, 6:24 PM EST | Severe Thunderstorm Warning | PBZ | Beaver, Lawrence, Mercer, Washington | 66 min |
| Mar 9, 6:44 PM EST | Severe Thunderstorm Warning | PBZ | Allegheny, Butler, Venango | 61 min |
| Mar 9, 7:07 PM EST | Severe Thunderstorm Warning | PBZ | Greene | 53 min |
| Mar 9, 7:14 PM EST | Severe Thunderstorm Warning | PBZ | Armstrong, Clarion, Fayette, Forest, Westmoreland | 61 min |
| Mar 9, 8:27 PM EST | Severe Thunderstorm Warning | BUF | Livingston | 33 min |
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 10.3 hours before the alert went out and 79 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
- 1877 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 196 m²/s²
- 0-3 km storm-relative helicity
- 140 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 9, 2:00 PM EST | Severe Thunderstorm Watch | SPC | Adams, Allen, Ashland, Athens, Auglaize, Brown and 64 more | 5 hr |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 2002Severe Thunderstorm Watches in Ohio, 2002Severe Thunderstorm Watches in New York, 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.