Alert archive / Kentucky / Mesoscale Discussions in 2015

Mesoscale Discussion 1374

July 12, 2015Jefferson County, Ohio County, Switzerland County, Indiana; 27 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jul 12, 2015, 4:57 AM EDT for Jefferson County, Ohio County, Switzerland County, Indiana; 27 counties in Kentucky. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Jul 12, 2015, 4:57 AM EDT (08:57 UTC)
Expired: Jul 12, 2015, 7:00 AM EDT
In force: 2 hr
Issued by: the Storm Prediction Center
Chance of a watch: 20%

All 30 counties

Jefferson County, IN, Ohio County, IN, Switzerland County, IN, Anderson County, KY, Bourbon County, KY, Boyle County, KY, Carroll County, KY, Clark County, KY, Estill County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Harrison County, KY, Henry County, KY, Jessamine County, KY, Lincoln County, KY, Madison County, KY, Mercer County, KY, Montgomery County, KY, Nicholas County, KY, Owen County, KY, Pendleton County, KY, Powell County, KY, Robertson County, KY, Scott County, KY, Shelby County, KY, Trimble County, KY, Woodford County, KY

The radar

The Louisville radar (KLVX), 118 km from the middle of the area, began a volume at 09:01 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, 9.0 hours before the alert went out and 139 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: 1214 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: -8 m²/s²
0-3 km storm-relative helicity: 28 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 12, 1:37 PM EDT	Mesoscale Discussion	SPC	Allen, Barren, Clinton, Cumberland, Edmonson, Green and 5 more	2 hr

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.