Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2003
Severe Thunderstorm Watch 935
The Storm Prediction Center issued this severe thunderstorm watch at Sep 27, 2003, 4:05 PM EDT for 5 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 27, 2003, 4:05 PM EDT (20:05 UTC)
- Expired
- Sep 27, 2003, 9:00 PM EDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
All 52 counties
Allegany County, MD, Garrett County, MD, Washington County, MD, Cayuga County, NY, Chemung County, NY, Cortland County, NY, Onondaga County, NY, Ontario County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Yates County, NY, Bedford County, PA, Blair County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clearfield County, PA, Clinton County, PA, Franklin County, PA, Fulton County, PA, Huntingdon County, PA, Juniata County, PA, Lycoming County, PA, Mifflin County, PA, Potter County, PA, Somerset County, PA, Tioga County, PA, Union County, PA, Augusta County, VA, City of Harrisonburg, VA, City of Staunton, VA, City of Winchester, VA, Frederick County, VA, Highland County, VA, Page County, VA, Rockingham County, VA, Shenandoah County, VA, Warren County, VA, Berkeley County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Mineral County, WV, Morgan County, WV, Pendleton County, WV, Pocahontas County, WV, Randolph County, WV, Tucker County, WV
The radar
The State College radar (KCCX), 92 km from the middle of the area, began a volume at 20:05 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
5 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 27, 5:20 PM EDT | Flash Flood Warning | LWX | Allegany | 4 hr |
| Sep 27, 5:39 PM EDT | Flash Flood Warning | CTP | Bedford | 3 hr |
| Sep 27, 6:18 PM EDT | Flash Flood Warning | CTP | Blair | 117 min |
| Sep 27, 6:47 PM EDT | Flash Flood Warning | CTP | Centre, Fulton, Huntingdon | 3 hr |
| Sep 27, 8:02 PM EDT | Flash Flood Warning | CTP | Blair | 118 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
Pittsburgh, PA (KPIT), launched 12:00Z, 8.1 hours before the alert went out and 143 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
- 54 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 683 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 115 m²/s²
- 0-3 km storm-relative helicity
- 119 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 |
|---|---|---|---|---|
| Sep 27, 2:22 PM EDT | Mesoscale Discussion | SPC | Frederick, Washington | 113 min |
| Sep 27, 6:52 PM EDT | Mesoscale Discussion | SPC | Allegany, Washington | 53 min |
| Sep 27, 1:58 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Cayuga, Erie, Genesee, Livingston and 9 more | 62 min |
| Sep 27, 2:35 AM EDT | Tornado Watch | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 6 more | 5 hr |
| Sep 27, 6:39 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Livingston, Wyoming | 96 min |
| Sep 27, 12:06 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Crawford, Lawrence and 3 more | 84 min |
| Sep 27, 12:40 AM EDT | Tornado Watch | SPC | Beaver, Butler, Crawford, Forest, Lawrence, Mercer and 2 more | 5 hr |
| Sep 27, 3:37 AM EDT | Mesoscale Discussion | SPC | Allegheny, Armstrong, Beaver, Butler, Cambria, Cameron and 17 more | 113 min |
| Sep 27, 5:15 AM EDT | Mesoscale Discussion | SPC | Beaver, Crawford, Lawrence, Mercer, Venango, Warren | 60 min |
| Sep 27, 11:42 AM EDT | Mesoscale Discussion | SPC | Dickenson, Lee, Russell, Scott, Wise, City of Norton | 108 min |
| Sep 27, 2:41 PM EDT | Mesoscale Discussion | SPC | Alleghany, Bedford, Bland, Botetourt, Carroll, Craig and 17 more | 2 hr |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 2003Severe Thunderstorm Watches in New York, 2003Severe Thunderstorm Watches in Virginia, 2003Every severe thunderstorm watch in 2003
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.