Alert archive / Pennsylvania / Mesoscale Discussions in 2003

Mesoscale Discussion 1264

June 8, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Jun 8, 2003, 6:29 PM EDT for 4 states. It was in force for 91 min.

The area

The outline as issued.

The facts

Issued: Jun 8, 2003, 6:29 PM EDT (22:29 UTC)
Expired: Jun 8, 2003, 8:00 PM EDT
In force: 91 min
Issued by: the Storm Prediction Center

All 59 counties

Allegany County, NY, Cattaraugus County, NY, Chautauqua County, NY, Erie County, NY, Genesee County, NY, Livingston County, NY, Wyoming County, NY, Belmont County, OH, Columbiana County, OH, Harrison County, OH, Jefferson County, OH, Mahoning County, OH, Monroe County, OH, Washington County, OH, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Clarion County, PA, Clearfield County, PA, Crawford County, PA, Elk 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, Potter County, PA, Venango County, PA, Warren County, PA, Washington County, PA, Westmoreland County, PA, Barbour County, WV, Brooke County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Hancock County, WV, Harrison County, WV, Jackson County, WV, Lewis County, WV, Marion County, WV, Marshall County, WV, Monongalia County, WV, Ohio County, WV, Pleasants County, WV, Preston County, WV, Ritchie County, WV, Taylor County, WV, Tyler County, WV, Upshur County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Pittsburgh radar (KPBZ), 51 km from the middle of the area, began a volume at 22:31 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 nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 10.5 hours before the alert went out and 53 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 68 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 652 m above ground
0-6 km bulk shear: 35 kt
0-1 km storm-relative helicity: 31 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 8, 10:53 AM EDT	Mesoscale Discussion	SPC	Allen, Auglaize, Butler, Champaign, Clark, Clermont and 26 more	2 hr
Jun 8, 11:40 AM EDT	Severe Thunderstorm Watch	SPC	Adams, Allen, Ashland, Auglaize, Brown, Butler and 60 more	5 hr
Jun 8, 2:09 PM EDT	Mesoscale Discussion	SPC	Ashland, Brown, Butler, Champaign, Clark, Clermont and 36 more	2 hr
Jun 8, 4:15 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Ashland, Ashtabula, Athens, Belmont, Carroll and 35 more	5 hr

Nearby

Mesoscale Discussions in Pennsylvania, 2003 Mesoscale Discussions in West Virginia, 2003 Mesoscale Discussions in New York, 2003 Every mesoscale discussion 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.