Alert archive / West Virginia / Mesoscale Discussions in 2011

Mesoscale Discussion 719

May 10, 20114 states

The Storm Prediction Center issued this mesoscale discussion at May 10, 2011, 11:17 PM EDT for 4 states. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: May 10, 2011, 11:17 PM EDT (03:17 UTC)
Expired: May 11, 2011, 12:15 AM EDT
In force: 58 min
Issued by: the Storm Prediction Center

All 63 counties

Bath County, KY, Boyd County, KY, Breathitt County, KY, Carter County, KY, Elliott County, KY, Fleming County, KY, Floyd County, KY, Greenup County, KY, Johnson County, KY, Knott County, KY, Lawrence County, KY, Letcher County, KY, Lewis County, KY, Magoffin County, KY, Martin County, KY, Mason County, KY, Menifee County, KY, Morgan County, KY, Perry County, KY, Pike County, KY, Rowan County, KY, Wolfe County, KY, Adams County, OH, Brown County, OH, Gallia County, OH, Lawrence County, OH, Scioto County, OH, Bland County, VA, Buchanan County, VA, City of Norton, VA, City of Radford, VA, Dickenson County, VA, Floyd County, VA, Giles County, VA, Montgomery County, VA, Pulaski County, VA, Roanoke County, VA, Russell County, VA, Tazewell County, VA, Wise County, VA, Boone County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Gilmer County, WV, Greenbrier County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Monroe County, WV, Nicholas County, WV, Putnam County, WV, Raleigh County, WV, Roane County, WV, Summers County, WV, Wayne County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 82 km from the middle of the area, began a volume at 03:16 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 275May 11, 1:00 AM EDT

The nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 00:00Z, 3.3 hours before the alert went out and 227 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: 1068 J/kg
Mixed-layer CIN: -186 J/kg
Mixed-layer LCL: 2337 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 82 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.6

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
May 11, 12:37 AM EDT	Mesoscale Discussion	SPC	Boyd, Breathitt, Carter, Elliott, Floyd, Greenup and 12 more	53 min
May 11, 1:01 AM EDT	Severe Thunderstorm Watch	SPC	Bath, Boyd, Breathitt, Carter, Elliott, Fleming and 16 more	5 hr
May 11, 5:07 AM EDT	Mesoscale Discussion	SPC	Bath, Boyd, Breathitt, Carter, Elliott, Fleming and 16 more	53 min
May 10, 9:01 PM EDT	Mesoscale Discussion	SPC	Bland, Buchanan, Carroll, Dickenson, Grayson, Russell and 9 more	59 min
May 11, 2:37 AM EDT	Mesoscale Discussion	SPC	Buchanan, Dickenson, Lee, Russell, Scott, Washington and 3 more	23 min

Nearby

Mesoscale Discussions in West Virginia, 2011 Mesoscale Discussions in Kentucky, 2011 Mesoscale Discussions in Virginia, 2011 Every mesoscale discussion in 2011

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.