Alert archive / West Virginia / Mesoscale Discussions in 2008

Mesoscale Discussion 187

February 6, 20084 states

The Storm Prediction Center issued this mesoscale discussion at Feb 6, 2008, 6:09 PM EST for 4 states. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Feb 6, 2008, 6:09 PM EST (23:09 UTC)
Expired: Feb 6, 2008, 7:15 PM EST
In force: 66 min
Issued by: the Storm Prediction Center

All 39 counties

Allegany County, MD, Garrett County, MD, Allegheny County, PA, Armstrong County, PA, Beaver County, PA, Bedford County, PA, Butler County, PA, Cambria County, PA, Fayette County, PA, Greene County, PA, Indiana County, PA, Somerset County, PA, Washington County, PA, Westmoreland County, PA, Alleghany County, VA, Bath County, VA, City of Covington, VA, Craig County, VA, Highland County, VA, Barbour County, WV, Braxton County, WV, Grant County, WV, Greenbrier County, WV, Harrison County, WV, Lewis County, WV, Marion County, WV, Mineral County, WV, Monongalia County, WV, Monroe County, WV, Nicholas County, WV, Pendleton County, WV, Pocahontas County, WV, Preston County, WV, Randolph County, WV, Summers County, WV, Taylor County, WV, Tucker County, WV, Upshur County, WV, Webster County, WV

The radar

The Pittsburgh radar (KPBZ), 141 km from the middle of the area, began a volume at 23:10 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, 11.2 hours before the alert went out and 126 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 813 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 384 m²/s²
0-3 km storm-relative helicity: 353 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
Feb 6, 4:49 AM EST	Mesoscale Discussion	SPC	Garrett	86 min
Feb 6, 2:48 AM EST	Mesoscale Discussion	SPC	Greene	87 min
Feb 6, 2:31 AM EST	Severe Thunderstorm Watch	SPC	Buchanan, Dickenson	3 hr
Feb 6, 8:49 AM EST	Mesoscale Discussion	SPC	Bland, Buchanan, Dickenson, Giles, Lee, Russell and 8 more	116 min
Feb 5, 10:19 PM EST	Mesoscale Discussion	SPC	Cabell, Jackson, Lincoln, Mason, Pleasants, Putnam and 4 more	86 min
Feb 6, 11:54 AM EST	Mesoscale Discussion	SPC	Boone, Cabell, Jackson, Lincoln, Logan, Mason and 5 more	96 min

Nearby

Mesoscale Discussions in West Virginia, 2008 Mesoscale Discussions in Pennsylvania, 2008 Mesoscale Discussions in Virginia, 2008 Every 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.