Alert archive / West Virginia / Mesoscale Discussions in 2006

Mesoscale Discussion 507

April 15, 2006Boyd County, Kentucky; 4 counties in Ohio; 21 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Apr 15, 2006, 12:05 AM EDT for Boyd County, Kentucky; 4 counties in Ohio; 21 counties in West Virginia. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued: Apr 15, 2006, 12:05 AM EDT (04:05 UTC)
Expired: Apr 15, 2006, 1:00 AM EDT
In force: 55 min
Issued by: the Storm Prediction Center

All 26 counties

Boyd County, KY, Gallia County, OH, Jackson County, OH, Lawrence County, OH, Meigs County, OH, Boone County, WV, Braxton County, WV, Cabell County, WV, Calhoun County, WV, Clay County, WV, Fayette County, WV, Jackson County, WV, Kanawha County, WV, Lincoln County, WV, Logan County, WV, Mason County, WV, McDowell County, WV, Mingo County, WV, Nicholas County, WV, Pocahontas County, WV, Putnam County, WV, Raleigh County, WV, Roane County, WV, Wayne County, WV, Webster County, WV, Wyoming County, WV

The radar

The Charleston,WV radar (KRLX), 17 km from the middle of the area, began a volume at 04:06 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

Roanoke, VA (KRNK), launched 00:00Z, 4.1 hours before the alert went out and 214 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: 783 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 2204 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 92 m²/s²
0-3 km storm-relative helicity: 117 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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
Apr 14, 9:12 PM EDT	Mesoscale Discussion	SPC	Boyd	93 min
Apr 14, 11:38 PM EDT	Mesoscale Discussion	SPC	Boone, Bracken, Campbell, Carroll, Fleming, Gallatin and 10 more	97 min
Apr 15, 2:42 PM EDT	Mesoscale Discussion	SPC	Gallia, Jackson, Lawrence, Meigs	63 min
Apr 15, 3:23 PM EDT	Severe Thunderstorm Watch	SPC	Barbour, Berkeley, Boone, Braxton, Calhoun, Clay and 29 more	5 hr

Nearby

Mesoscale Discussions in West Virginia, 2006 Mesoscale Discussions in Ohio, 2006 Mesoscale Discussions in Kentucky, 2006 Every mesoscale discussion in 2006

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.