Alert archive / West Virginia / Mesoscale Discussions in 2014

Mesoscale Discussion 953

June 11, 20145 states

The Storm Prediction Center issued this mesoscale discussion at Jun 11, 2014, 12:25 PM EDT for 5 states. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 11, 2014, 12:25 PM EDT (16:25 UTC)
Expired
Jun 11, 2014, 2:30 PM EDT
In force
2 hr
Issued by
the Storm Prediction Center
Chance of a watch
40%
All 75 counties

Floyd County, KY, Martin County, KY, Pike County, KY, Belmont County, OH, Guernsey County, OH, Harrison County, OH, Meigs County, OH, Monroe County, OH, Morgan County, OH, Noble County, OH, Tuscarawas County, OH, Washington County, OH, Greene County, PA, Alleghany County, VA, Bath County, VA, Bland County, VA, Buchanan County, VA, City of Covington, VA, City of Radford, VA, Craig County, VA, Dickenson County, VA, Giles County, VA, Highland County, VA, Montgomery County, VA, Pulaski County, VA, Roanoke County, VA, Russell County, VA, Smyth County, VA, Tazewell County, VA, Washington County, VA, Wythe County, VA, Barbour County, WV, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Doddridge County, WV, Fayette County, WV, Gilmer County, WV, Greenbrier County, WV, Harrison County, WV, Jackson County, WV, Kanawha County, WV, Lewis County, WV, Lincoln County, WV, Logan County, WV, Marion County, WV, Marshall County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monongalia County, WV, Monroe County, WV, Nicholas County, WV, Ohio County, WV, Pleasants County, WV, Pocahontas County, WV, Putnam County, WV, Raleigh County, WV, Randolph County, WV, Ritchie County, WV, Roane County, WV, Summers 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, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 74 km from the middle of the area, began a volume at 16:28 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

Roanoke, VA (KRNK), launched 12:00Z, 4.4 hours before the alert went out and 170 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-pSkew-T log-p diagram, Roanoke, VA at 12:00Z on 2014-06-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 34 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Roanoke, VA at 12:00Z on 2014-06-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 55 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
34 J/kg
Mixed-layer CIN
-291 J/kg
Mixed-layer LCL
1084 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
55 m²/s²
0-3 km storm-relative helicity
55 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.

IssuedProductOfficeCountiesLasted
Jun 10, 8:30 PM EDTMesoscale DiscussionSPCAthens, Fairfield, Gallia, Hocking, Jackson, Meigs and 9 more90 min
Jun 11, 1:32 PM EDTMesoscale DiscussionSPCAdams, Allegheny, Armstrong, Bedford, Butler, Fayette and 5 more118 min
Jun 11, 2:59 PM EDTTornado WatchSPCAdams, Allegheny, Armstrong, Beaver, Bedford, Blair and 14 more6 hr
Jun 11, 4:49 PM EDTMesoscale DiscussionSPCMcKean, Potter86 min
Jun 11, 2:06 PM EDTSevere Thunderstorm WatchSPCSmyth, Tazewell7 hr
Jun 11, 2:25 PM EDTMesoscale DiscussionSPCAmelia, Appomattox, Brunswick, Campbell, Charlotte, Chesterfield and 21 more95 min
Jun 11, 3:24 PM EDTSevere Thunderstorm WatchSPCAlbemarle, Alleghany, Amelia, Amherst, Appomattox, Augusta and 97 more7 hr
Jun 11, 6:56 PM EDTMesoscale DiscussionSPCAlleghany, Amherst, Augusta, Bath, Bedford, Bland and 32 more94 min

Nearby

Mesoscale Discussions in West Virginia, 2014Mesoscale Discussions in Virginia, 2014Mesoscale Discussions in Ohio, 2014Every mesoscale discussion in 2014

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.