Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 1246

June 30, 20159 counties in Indiana; 30 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jun 30, 2015, 2:32 PM EDT for 9 counties in Indiana; 30 counties in Kentucky. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jun 30, 2015, 2:32 PM EDT (18:32 UTC)
Expired: Jun 30, 2015, 5:00 PM EDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 40%

All 39 counties

Clark County, IN, Crawford County, IN, Floyd County, IN, Harrison County, IN, Jackson County, IN, Lawrence County, IN, Orange County, IN, Scott County, IN, Washington County, IN, Adair County, KY, Anderson County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Casey County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Hart County, KY, Jefferson County, KY, Jessamine County, KY, Larue County, KY, Lincoln County, KY, Marion County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Nelson County, KY, Oldham County, KY, Shelby County, KY, Spencer County, KY, Taylor County, KY, Trimble County, KY, Washington County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 37 km from the middle of the area, began a volume at 18:33 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, 6.5 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: 134 J/kg
Mixed-layer CIN: -29 J/kg
Mixed-layer LCL: 728 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 64 m²/s²
0-3 km storm-relative helicity: 104 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

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
Jun 30, 12:03 PM EDT	Mesoscale Discussion	SPC	Dearborn, Franklin, Jefferson, Ohio, Ripley, Switzerland	2 hr
Jun 30, 12:58 PM EDT	Severe Thunderstorm Watch	SPC	Clark, Dearborn, Floyd, Franklin, Jefferson, Ohio and 3 more	8 hr
Jun 30, 7:08 PM EDT	Mesoscale Discussion	SPC	Clark	67 min
Jun 30, 12:55 PM EDT	Mesoscale Discussion	SPC	Bell, Breathitt, Clay, Clinton, Floyd, Harlan and 22 more	3 hr
Jun 30, 1:37 PM EDT	Severe Thunderstorm Watch	SPC	Bath, Bell, Boyd, Breathitt, Carter, Clay and 30 more	7 hr
Jun 30, 3:48 PM EDT	Mesoscale Discussion	SPC	Bath, Bourbon, Boyd, Bracken, Breathitt, Carter and 34 more	117 min
Jun 30, 4:33 PM EDT	Mesoscale Discussion	SPC	McCreary, Whitley	117 min

Nearby

Mesoscale Discussions in Kentucky, 2015 Mesoscale Discussions in Indiana, 2015 Every mesoscale discussion in 2015

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.