Alert archive / West Virginia / Mesoscale Discussions in 2012

Mesoscale Discussion 395

March 30, 20124 counties in Kentucky; 7 counties in Ohio; 14 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2012, 11:18 PM EDT for 4 counties in Kentucky; 7 counties in Ohio; 14 counties in West Virginia. It was in force for 57 min.

The area

The outline as issued.

The facts

Issued: Mar 30, 2012, 11:18 PM EDT (03:18 UTC)
Expired: Mar 31, 2012, 12:15 AM EDT
In force: 57 min
Issued by: the Storm Prediction Center

All 25 counties

Boyd County, KY, Carter County, KY, Greenup County, KY, Lewis County, KY, Athens County, OH, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Scioto County, OH, Washington County, OH, Cabell County, WV, Calhoun County, WV, Doddridge County, WV, Gilmer County, WV, Jackson County, WV, Mason County, WV, Pleasants County, WV, Putnam County, WV, Ritchie County, WV, Roane County, WV, Tyler County, WV, Wetzel County, WV, Wirt County, WV, Wood County, WV

The radar

The Charleston,WV radar (KRLX), 67 km from the middle of the area, began a volume at 03:18 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 00:00Z, 3.3 hours before the alert went out and 169 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: 381 J/kg
Mixed-layer CIN: -31 J/kg
Mixed-layer LCL: 1859 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 69 m²/s²
0-3 km storm-relative helicity: 155 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.5

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
Mar 30, 10:25 PM EDT	Mesoscale Discussion	SPC	Boone, Carroll, Gallatin, Grant, Kenton, Oldham and 1 more	35 min

Nearby

Mesoscale Discussions in West Virginia, 2012 Mesoscale Discussions in Ohio, 2012 Mesoscale Discussions in Kentucky, 2012 Every mesoscale discussion in 2012

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.