Alert archive / Kentucky / Mesoscale Discussions in 2014

Mesoscale Discussion 1304

July 7, 2014Harrison County, Perry County, Indiana; 18 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jul 7, 2014, 7:17 PM EDT for Harrison County, Perry County, Indiana; 18 counties in Kentucky. It was in force for 58 min.

The area

The outline as issued.

The facts

Issued: Jul 7, 2014, 7:17 PM EDT (23:17 UTC)
Expired: Jul 7, 2014, 8:15 PM EDT
In force: 58 min
Issued by: the Storm Prediction Center
Chance of a watch: 20%

Counties Harrison County, IN, Perry County, IN, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Jefferson County, KY, Larue County, KY, McLean County, KY, Meade County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Warren County, KY, Washington County, KY

The radar

The Louisville radar (KLVX), 58 km from the middle of the area, began a volume at 23:17 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, 11.3 hours before the alert went out and 303 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: 1145 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 21 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
Jul 7, 1:18 PM EDT	Mesoscale Discussion	SPC	Brown, Clay, Fayette, Franklin, Hamilton, Hancock and 14 more	87 min
Jul 7, 2:45 PM EDT	Mesoscale Discussion	SPC	Clay, Daviess, Dubois, Gibson, Greene, Knox and 9 more	90 min

Nearby

Mesoscale Discussions in Kentucky, 2014 Mesoscale Discussions in Indiana, 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.