Alert archive / Pennsylvania / Mesoscale Discussions in 2008
Mesoscale Discussion 1634
The Storm Prediction Center issued this mesoscale discussion at Jun 29, 2008, 4:14 PM EDT for 4 states. It was in force for 91 min.
The area
The outline as issued.
The facts
- Issued
- Jun 29, 2008, 4:14 PM EDT (20:14 UTC)
- Expired
- Jun 29, 2008, 5:45 PM EDT
- In force
- 91 min
- Issued by
- the Storm Prediction Center
All 107 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, Fulton County, NY, Genesee County, NY, Hamilton County, NY, Herkimer County, NY, Jefferson County, NY, Lewis County, NY, Livingston County, NY, Madison County, NY, Monroe County, NY, Montgomery County, NY, Oneida County, NY, Onondaga County, NY, Ontario County, NY, Orleans 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, Belmont County, OH, Carroll County, OH, Columbiana County, OH, Guernsey County, OH, Harrison County, OH, Jefferson County, OH, Mahoning County, OH, Monroe County, OH, Morgan County, OH, Muskingum County, OH, Noble County, OH, Perry County, OH, Tuscarawas County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Blair County, PA, Bradford County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Columbia County, PA, Crawford County, PA, Cumberland County, PA, Dauphin County, PA, Elk County, PA, Fayette County, PA, Forest County, PA, Franklin County, PA, Fulton County, PA, Greene County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lackawanna County, PA, Lawrence County, PA, Luzerne County, PA, Lycoming County, PA, McKean County, PA, Mercer County, PA, Mifflin County, PA, Montour County, PA, Northumberland County, PA, Perry County, PA, Potter County, PA, Schuylkill County, PA, Snyder County, PA, Somerset County, PA, Sullivan County, PA, Susquehanna County, PA, Tioga County, PA, Union County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Wayne County, PA, Westmoreland County, PA, Wyoming County, PA, Brooke County, WV, Hancock County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Preston County, WV, Tyler County, WV, Wetzel County, WV
The radar
The State College radar (KCCX), 99 km from the middle of the area, began a volume at 20:13 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.
The watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 8.2 hours before the alert went out and 145 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
- 25 J/kg
- Mixed-layer CIN
- -97 J/kg
- Mixed-layer LCL
- 1174 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 93 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 29, 10:46 AM EDT | Mesoscale Discussion | SPC | Allegany, Cattaraugus, Chautauqua, Erie, Genesee, Livingston and 6 more | 119 min |
| Jun 29, 12:11 PM EDT | Severe Thunderstorm Watch | SPC | Allegany, Cattaraugus, Cayuga, Chautauqua, Erie, Genesee and 14 more | 8 hr |
| Jun 29, 12:53 PM EDT | Mesoscale Discussion | SPC | Albany, Bronx, Columbia, Dutchess, Fulton, Greene and 15 more | 67 min |
| Jun 29, 2:04 PM EDT | Mesoscale Discussion | SPC | Broome, Tioga | 116 min |
| Jun 29, 4:11 PM EDT | Severe Thunderstorm Watch | SPC | Albany, Bronx, Broome, Chemung, Chenango, Clinton and 34 more | 7 hr |
| Jun 29, 7:13 PM EDT | Mesoscale Discussion | SPC | Albany, Allegany, Bronx, Broome, Cayuga, Chemung and 48 more | 92 min |
| Jun 28, 8:06 PM EDT | Mesoscale Discussion | SPC | Adams, Brown, Gallia, Jackson, Lawrence, Meigs and 1 more | 54 min |
| Jun 29, 4:37 PM EDT | Severe Thunderstorm Watch | SPC | Berkeley, Grant, Hampshire, Hardy, Jefferson, Mineral and 2 more | 9 hr |
Nearby
Mesoscale Discussions in Pennsylvania, 2008Mesoscale Discussions in New York, 2008Mesoscale Discussions in Ohio, 2008Every mesoscale discussion in 2008
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.