Alert archive / Kentucky / Mesoscale Discussions in 2011

Mesoscale Discussion 1264

June 17, 2011Hardin County, Illinois; 7 counties in Indiana; 13 counties in Kentucky

The Storm Prediction Center issued this mesoscale discussion at Jun 17, 2011, 3:39 PM CDT for Hardin County, Illinois; 7 counties in Indiana; 13 counties in Kentucky. It was in force for 66 min.

The area

The outline as issued.

The facts

Issued: Jun 17, 2011, 3:39 PM CDT (20:39 UTC)
Expired: Jun 17, 2011, 4:45 PM CDT
In force: 66 min
Issued by: the Storm Prediction Center

All 21 counties

Hardin County, IL, Crawford County, IN, Dubois County, IN, Perry County, IN, Pike County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Breckinridge County, KY, Butler County, KY, Crittenden County, KY, Daviess County, KY, Grayson County, KY, Hancock County, KY, Henderson County, KY, Hopkins County, KY, McLean County, KY, Muhlenberg County, KY, Ohio County, KY, Union County, KY, Webster County, KY

The radar

The Evansville,IN radar (KVWX), 51 km from the middle of the area, began a volume at 20:41 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

Nashville Metro, TN (KBNA), launched 12:00Z, 8.7 hours before the alert went out and 208 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: 148 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 1183 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 36 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
Jun 17, 12:10 PM CDT	Mesoscale Discussion	SPC	Bond, Clay, Clinton, Edwards, Effingham, Fayette and 12 more	65 min
Jun 17, 1:34 PM CDT	Mesoscale Discussion	SPC	Clay, Crawford, Edwards, Effingham, Franklin, Hamilton and 8 more	26 min
Jun 17, 1:40 PM CDT	Severe Thunderstorm Watch	SPC	Clay, Edwards, Franklin, Gallatin, Hamilton, Hardin and 10 more	4 hr
Jun 16, 8:22 PM CDT	Mesoscale Discussion	SPC	Calloway, Christian, Marshall, Trigg	53 min

Nearby

Mesoscale Discussions in Kentucky, 2011 Mesoscale Discussions in Indiana, 2011 Mesoscale Discussions in Illinois, 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.