Alert archive / Kentucky / Mesoscale Discussions in 2011

Mesoscale Discussion 1588

July 11, 201126 counties in Kentucky; 6 counties in West Virginia

The Storm Prediction Center issued this mesoscale discussion at Jul 11, 2011, 11:22 PM EDT for 26 counties in Kentucky; 6 counties in West Virginia. It was in force for 83 min.

The area

The outline as issued.

The facts

Issued: Jul 11, 2011, 11:22 PM EDT (03:22 UTC)
Expired: Jul 12, 2011, 12:45 AM EDT
In force: 83 min
Issued by: the Storm Prediction Center

All 32 counties

Bath County, KY, Breathitt County, KY, Clay County, KY, Elliott County, KY, Estill County, KY, Fleming County, KY, Floyd County, KY, Jackson County, KY, Johnson County, KY, Knott County, KY, Lawrence County, KY, Lee County, KY, Leslie County, KY, Letcher County, KY, Magoffin County, KY, Martin County, KY, Menifee County, KY, Montgomery County, KY, Morgan County, KY, Nicholas County, KY, Owsley County, KY, Perry County, KY, Pike County, KY, Powell County, KY, Rowan County, KY, Wolfe County, KY, Boone County, WV, Cabell County, WV, Lincoln County, WV, Logan County, WV, Mingo County, WV, Wayne County, WV

The radar

The Jackson,KY radar (KJKL), 46 km from the middle of the area, began a volume at 03:24 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, 3.4 hours before the alert went out and 178 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: 4907 J/kg
Mixed-layer CIN: -61 J/kg
Mixed-layer LCL: 987 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 202 m²/s²
0-3 km storm-relative helicity: 267 m²/s²
Significant tornado parameter: 5.9
Supercell composite: 33.6

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
Jul 11, 9:22 PM EDT	Severe Thunderstorm Watch	SPC	Boone, Boyd, Bracken, Campbell, Carroll, Carter and 9 more	3 hr
Jul 12, 1:18 PM EDT	Mesoscale Discussion	SPC	Adair, Allen, Anderson, Barren, Bourbon, Boyle and 35 more	87 min
Jul 11, 8:51 PM EDT	Mesoscale Discussion	SPC	Jackson, Marshall, Mason, Ohio, Pleasants, Ritchie and 3 more	54 min

Nearby

Mesoscale Discussions in Kentucky, 2011 Mesoscale Discussions in West 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.