Alert archive / Pennsylvania / Severe Thunderstorm Watches in 2004
Severe Thunderstorm Watch 730
The Storm Prediction Center issued this severe thunderstorm watch at Aug 10, 2004, 1:10 PM EDT for 4 states. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Aug 10, 2004, 1:10 PM EDT (17:10 UTC)
- Expired
- Aug 10, 2004, 8:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
All 64 counties
Allegany County, NY, Broome County, NY, Cattaraugus County, NY, Cayuga County, NY, Chautauqua County, NY, Chemung County, NY, Chenango County, NY, Cortland County, NY, Delaware County, NY, Erie County, NY, Genesee County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Oswego County, NY, Otsego County, NY, Schuyler County, NY, Seneca County, NY, Steuben County, NY, Tioga County, NY, Tompkins County, NY, Wayne County, NY, Wyoming County, NY, Yates County, NY, Ashtabula County, OH, Columbiana County, OH, Jefferson County, OH, Mahoning County, OH, Trumbull County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bradford County, PA, Butler County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Crawford County, PA, Elk County, PA, Erie County, PA, Forest County, PA, Indiana County, PA, Jefferson County, PA, Lawrence County, PA, Lycoming County, PA, McKean County, PA, Mercer County, PA, Potter County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Wyoming County, PA, Brooke County, WV, Hancock County, WV, Ohio County, WV
The radar
The Buffalo radar (KBUF), 105 km from the middle of the area, began a volume at 17:11 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
23 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 1:15 PM EDT | Severe Thunderstorm Warning | CLE | Trumbull | 60 min |
| Aug 10, 2:09 PM EDT | Severe Thunderstorm Warning | PBZ | Venango | 51 min |
| Aug 10, 2:36 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus | 54 min |
| Aug 10, 2:43 PM EDT | Severe Thunderstorm Warning | CTP | Warren | 62 min |
| Aug 10, 3:15 PM EDT | Severe Thunderstorm Warning | PBZ | Beaver | 60 min |
| Aug 10, 3:32 PM EDT | Severe Thunderstorm Warning | BUF | Cattaraugus | 43 min |
| Aug 10, 3:44 PM EDT | Severe Thunderstorm Warning | PBZ | Butler | 61 min |
| Aug 10, 3:55 PM EDT | Severe Thunderstorm Warning | CTP | McKean | 65 min |
| Aug 10, 3:56 PM EDT | Severe Thunderstorm Warning | BGM | Madison | 64 min |
| Aug 10, 4:54 PM EDT | Severe Thunderstorm Warning | BGM | Steuben | 36 min |
| Aug 10, 5:09 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 51 min |
| Aug 10, 5:10 PM EDT | Severe Thunderstorm Warning | BUF | Allegany | 35 min |
| Aug 10, 5:13 PM EDT | Severe Thunderstorm Warning | PBZ | Armstrong | 47 min |
| Aug 10, 5:27 PM EDT | Severe Thunderstorm Warning | PBZ | Indiana | 63 min |
| Aug 10, 5:35 PM EDT | Severe Thunderstorm Warning | BGM | Schuyler | 40 min |
| Aug 10, 5:50 PM EDT | Severe Thunderstorm Warning | CTP | Potter | 40 min |
| Aug 10, 5:56 PM EDT | Severe Thunderstorm Warning | PBZ | Westmoreland | 64 min |
| Aug 10, 5:58 PM EDT | Severe Thunderstorm Warning | BGM | Steuben | 62 min |
| Aug 10, 6:22 PM EDT | Severe Thunderstorm Warning | BGM | Cayuga | 23 min |
| Aug 10, 6:34 PM EDT | Severe Thunderstorm Warning | BUF | Cayuga | 41 min |
| Aug 10, 6:43 PM EDT | Severe Thunderstorm Warning | BGM | Onondaga | 32 min |
| Aug 10, 6:58 PM EDT | Severe Thunderstorm Warning | CTP | Tioga | 62 min |
| Aug 10, 7:03 PM EDT | Severe Thunderstorm Warning | BUF | Oswego | 57 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
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 5.2 hours before the alert went out and 103 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
- 465 J/kg
- Mixed-layer CIN
- -54 J/kg
- Mixed-layer LCL
- 850 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 167 m²/s²
- 0-3 km storm-relative helicity
- 196 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 3.7
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 11:54 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 6 more | 96 min |
| Aug 10, 4:16 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cattaraugus, Cayuga, Chautauqua, Chemung and 22 more | 89 min |
| Aug 10, 7:27 PM EDT | Mesoscale Discussion | SPC | Allegany, Broome, Cayuga, Chemung, Chenango, Cortland and 18 more | 93 min |
| Aug 9, 10:14 PM EDT | Mesoscale Discussion | SPC | Williams | 61 min |
| Aug 10, 3:17 PM EDT | Mesoscale Discussion | SPC | Athens, Belmont, Gallia, Guernsey, Hocking, Jackson and 8 more | 88 min |
Nearby
Severe Thunderstorm Watches in Pennsylvania, 2004Severe Thunderstorm Watches in New York, 2004Severe Thunderstorm Watches in Ohio, 2004Every severe thunderstorm watch in 2004
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.