Alert archive / Kentucky / Mesoscale Discussions in 2014

Mesoscale Discussion 267

April 3, 201412 counties in Kentucky; 4 counties in Virginia; 10 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 3, 2014, 6:16 PM EDT for 12 counties in Kentucky; 4 counties in Virginia; 10 counties in West Virginia. It was in force for 89 min.

The area

The outline as issued.

The facts

Issued: Apr 3, 2014, 6:16 PM EDT (22:16 UTC)
Expired: Apr 3, 2014, 7:45 PM EDT
In force: 89 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 26 counties

Clay County, KY, Harlan County, KY, Knott County, KY, Knox County, KY, Laurel County, KY, Leslie County, KY, Letcher County, KY, Metcalfe County, KY, Perry County, KY, Pulaski County, KY, Russell County, KY, Wayne County, KY, Buchanan County, VA, City of Norton, VA, Dickenson County, VA, Wise County, VA, Greenbrier County, WV, McDowell County, WV, Mercer County, WV, Pocahontas County, WV, Raleigh County, WV, Randolph County, WV, Summers County, WV, Upshur County, WV, Webster County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 85 km from the middle of the area, began a volume at 22:16 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 nearest sounding before it

Cncnati-Daytn, OH (KILN), launched 12:00Z, 10.3 hours before the alert went out and 241 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: 798 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 231 m²/s²
0-3 km storm-relative helicity: 273 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
Apr 3, 10:22 AM EDT	Mesoscale Discussion	SPC	Allen, Ballard, Barren, Breckinridge, Bullitt, Butler and 39 more	83 min
Apr 3, 1:28 PM EDT	Mesoscale Discussion	SPC	Ballard, Carlisle, Crittenden, Graves, Hickman, Livingston and 3 more	62 min
Apr 3, 1:46 PM EDT	Tornado Watch	SPC	Ballard, Calloway, Carlisle, Fulton, Graves, Hickman and 3 more	4 hr

Nearby

Mesoscale Discussions in Kentucky, 2014 Mesoscale Discussions in West Virginia, 2014 Mesoscale Discussions in Virginia, 2014 Every 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.