Alert archive / West Virginia / Mesoscale Discussions in 2014

Mesoscale Discussion 1818

October 6, 2014Martin County, Pike County, Kentucky; 8 counties in Virginia; 14 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Oct 6, 2014, 6:28 PM EDT for Martin County, Pike County, Kentucky; 8 counties in Virginia; 14 counties in West Virginia. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued: Oct 6, 2014, 6:28 PM EDT (22:28 UTC)
Expired: Oct 6, 2014, 8:00 PM EDT
In force: 92 min
Issued by: the Storm Prediction Center
Chance of a watch: 5%

All 24 counties

Martin County, KY, Pike County, KY, Buchanan County, VA, City of Norton, VA, Dickenson County, VA, Russell County, VA, Scott County, VA, Tazewell County, VA, Washington County, VA, Wise County, VA, Boone County, WV, Cabell County, WV, Fayette County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mercer County, WV, Mingo County, WV, Putnam County, WV, Raleigh County, WV, Wayne County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 52 km from the middle of the area, began a volume at 22:29 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, 10.5 hours before the alert went out and 237 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: 1173 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 173 m²/s²
0-3 km storm-relative helicity: 190 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
Oct 6, 3:49 PM EDT	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Ballard, Barren, Bath and 77 more	56 min
Oct 6, 7:57 PM EDT	Mesoscale Discussion	SPC	Anderson, Boone, Bourbon, Boyle, Bracken, Breckinridge and 39 more	63 min

Nearby

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