Alert archive / West Virginia / Mesoscale Discussions in 2009

Mesoscale Discussion 1003

June 9, 20095 states

The Storm Prediction Center issued this mesoscale discussion at Jun 9, 2009, 1:38 PM EDT for 5 states. It was in force for 97 min.

The area

The outline as issued.

The facts

Issued: Jun 9, 2009, 1:38 PM EDT (17:38 UTC)
Expired: Jun 9, 2009, 3:15 PM EDT
In force: 97 min
Issued by: the Storm Prediction Center

All 68 counties

Boyd County, KY, Greenup County, KY, Lewis County, KY, Allegany County, MD, Garrett County, MD, Adams County, OH, Athens County, OH, Brown County, OH, Clinton County, OH, Fairfield County, OH, Fayette County, OH, Gallia County, OH, Highland County, OH, Hocking County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Noble County, OH, Perry County, OH, Pickaway County, OH, Pike County, OH, Ross County, OH, Scioto County, OH, Vinton County, OH, Washington County, OH, City of Winchester, VA, Frederick County, VA, Barbour County, WV, Berkeley County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Gilmer County, WV, Grant County, WV, Hampshire County, WV, Hardy County, WV, Harrison County, WV, Jackson County, WV, Jefferson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Marion County, WV, Mason County, WV, Mineral County, WV, Monongalia County, WV, Morgan County, WV, Nicholas County, WV, Pendleton County, WV, Pleasants County, WV, Preston County, WV, Putnam County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Taylor County, WV, Tucker County, WV, Tyler County, WV, Upshur County, WV, Wayne County, WV, Webster County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 88 km from the middle of the area, began a volume at 17:41 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 356Jun 9, 2:05 PM EDT

The nearest sounding before it

Pittsburgh, PA (KPIT), launched 12:00Z, 5.6 hours before the alert went out and 184 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: 1491 J/kg
Mixed-layer CIN: -43 J/kg
Mixed-layer LCL: 715 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 2.7

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, 10:35 PM EDT	Mesoscale Discussion	SPC	Ballard, McCracken	55 min
Jun 9, 2:07 PM EDT	Severe Thunderstorm Watch	SPC	Boyd, Carter, Greenup, Lawrence	7 hr
Jun 9, 4:04 PM EDT	Mesoscale Discussion	SPC	Ballard, Carlisle, McCracken	86 min
Jun 9, 4:41 PM EDT	Severe Thunderstorm Watch	SPC	Ballard, Carlisle, Fulton, Graves, Hickman, McCracken	7 hr
Jun 9, 6:01 AM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Caroline, Carroll, Cecil and 14 more	59 min
Jun 9, 4:03 PM EDT	Mesoscale Discussion	SPC	Anne Arundel, Baltimore, Calvert, Carroll, Charles, Frederick and 5 more	57 min
Jun 9, 7:05 PM EDT	Mesoscale Discussion	SPC	Saint Mary's, Somerset, Wicomico, Worcester	115 min
Jun 9, 2:31 PM EDT	Mesoscale Discussion	SPC	Amelia, Amherst, Appomattox, Bedford, Brunswick, Buckingham and 51 more	89 min

Nearby

Mesoscale Discussions in West Virginia, 2009 Mesoscale Discussions in Ohio, 2009 Mesoscale Discussions in Kentucky, 2009 Every mesoscale discussion in 2009

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.