Alert archive / Pennsylvania / Mesoscale Discussions in 2005

Mesoscale Discussion 1193

June 6, 200525 counties in Pennsylvania

The Storm Prediction Center issued this mesoscale discussion at Jun 6, 2005, 8:35 AM EDT for 25 counties in Pennsylvania. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued: Jun 6, 2005, 8:35 AM EDT (12:35 UTC)
Expired: Jun 6, 2005, 10:30 AM EDT
In force: 115 min
Issued by: the Storm Prediction Center

All 25 counties

Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Blair County, PA, Butler County, PA, Cambria County, PA, Cameron County, PA, Centre County, PA, Clarion County, PA, Clearfield County, PA, Clinton County, PA, Elk County, PA, Forest County, PA, Huntingdon County, PA, Indiana County, PA, Jefferson County, PA, Juniata County, PA, Lawrence County, PA, Lycoming County, PA, Mercer County, PA, Mifflin County, PA, Snyder County, PA, Union County, PA, Venango County, PA, Westmoreland County, PA

The radar

The State College radar (KCCX), 25 km from the middle of the area, began a volume at 12:37 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.

Severe Thunderstorm Watch 413Jun 6, 9:30 AM EDT

The nearest sounding before it

Buffalo Intl Airport, NY (KBUF), launched 12:00Z, 0.6 hours before the alert went out and 225 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: 50 J/kg
Mixed-layer CIN: -218 J/kg
Mixed-layer LCL: 1618 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 185 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 5, 10:28 PM EDT	Mesoscale Discussion	SPC	Beaver, Crawford, Erie, Lawrence, Mercer	92 min
Jun 6, 9:30 AM EDT	Severe Thunderstorm Watch	SPC	Bedford, Blair, Bradford, Cambria, Cameron, Carbon and 28 more	9 hr
Jun 6, 10:28 AM EDT	Mesoscale Discussion	SPC	Adams, Berks, Blair, Bradford, Bucks, Carbon and 33 more	62 min
Jun 6, 12:30 PM EDT	Tornado Watch	SPC	Bradford, Columbia, Lackawanna, Luzerne, Montour, Sullivan and 3 more	6 hr
Jun 6, 12:46 PM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Bedford, Blair, Butler and 18 more	59 min
Jun 6, 1:00 PM EDT	Severe Thunderstorm Watch	SPC	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 8 more	7 hr
Jun 6, 1:55 PM EDT	Severe Thunderstorm Watch	SPC	Adams, Berks, Bucks, Chester, Cumberland, Dauphin and 9 more	8 hr
Jun 6, 4:35 PM EDT	Mesoscale Discussion	SPC	Bucks, Chester, Delaware, Lancaster, Montgomery, Philadelphia and 1 more	55 min
Jun 6, 5:00 PM EDT	Mesoscale Discussion	SPC	Adams, Bedford, Chester, Cumberland, Delaware, Fayette and 8 more	90 min
Jun 6, 5:32 PM EDT	Mesoscale Discussion	SPC	Allegheny, Armstrong, Beaver, Butler, Clarion, Fayette and 8 more	88 min
Jun 6, 6:34 PM EDT	Mesoscale Discussion	SPC	Chester, Delaware, Philadelphia	86 min

Nearby

Mesoscale Discussions in Pennsylvania, 2005 Every mesoscale discussion in 2005

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.