Alert archive / Kentucky / Tornado Watches in 2009

Tornado Watch 381

June 11, 20098 counties in Illinois; 16 counties in Indiana; 50 counties in Kentucky

The Storm Prediction Center issued this tornado watch at Jun 11, 2009, 4:47 PM CDT for 8 counties in Illinois; 16 counties in Indiana; 50 counties in Kentucky. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2009, 4:47 PM CDT (21:47 UTC)
Expired: Jun 11, 2009, 10:58 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 74 counties

Edwards County, IL, Gallatin County, IL, Hamilton County, IL, Hardin County, IL, Saline County, IL, Wabash County, IL, Wayne County, IL, White County, IL, Clark County, IN, Crawford County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Harrison County, IN, Jefferson County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Scott County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Boyle County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Caldwell County, KY, Casey County, KY, Christian County, KY, Clinton County, KY, Crittenden County, KY, Cumberland County, KY, Daviess County, KY, Edmonson County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Hart County, KY, Henderson County, KY, Hopkins County, KY, Jefferson County, KY, Larue County, KY, Lincoln County, KY, Logan County, KY, Lyon County, KY, Marion County, KY, McLean County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Nelson County, KY, Ohio County, KY, Oldham County, KY, Russell County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Trimble County, KY, Union County, KY, Warren County, KY, Washington County, KY, Webster County, KY

The radar

The Evansville,IN radar (KVWX), 66 km from the middle of the area, began a volume at 21:47 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes: 40%
One or more EF2 to EF5 tornadoes: 20%
Ten or more severe wind reports: 40%
One or more gusts of 65 knots or more: 10%
Ten or more severe hail reports: 60%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Jun 11, 4:48 PM CDT	Severe Thunderstorm Warning	PAH	Posey, Vanderburgh	17 min
Jun 11, 4:51 PM CDT	Tornado Warning	PAH	Spencer, Vanderburgh, Warrick	24 min
Jun 11, 4:53 PM CDT	Severe Thunderstorm Warning	PAH	Edwards, Wayne	25 min
Jun 11, 5:18 PM CDT	Tornado Warning	PAH	Spencer, Warrick	34 min
Jun 11, 5:35 PM CDT	Severe Thunderstorm Warning	LMK	Grayson	40 min
Jun 11, 5:50 PM CDT	Severe Thunderstorm Warning	LMK	Breckinridge, Ohio	25 min
Jun 11, 5:54 PM CDT	Flash Flood Warning	LMK	Grayson, Ohio	116 min
Jun 11, 5:59 PM CDT	Tornado Warning	LMK	Edmonson, Grayson, Hart	31 min
Jun 11, 6:09 PM CDT	Severe Thunderstorm Warning	LMK	Butler, Ohio	51 min
Jun 11, 7:16 PM CDT	Tornado Warning	LMK	Barren, Edmonson, Warren	44 min
Jun 11, 7:23 PM CDT	Tornado Warning	LMK	Barren, Green, Hart, Metcalfe	37 min
Jun 11, 7:35 PM CDT	Severe Thunderstorm Warning	LMK	Logan, Simpson	40 min
Jun 11, 7:37 PM CDT	Severe Thunderstorm Warning	PAH	Christian, Todd	38 min
Jun 11, 7:39 PM CDT	Tornado Warning	LMK	Barren, Metcalfe, Monroe	36 min
Jun 11, 7:56 PM CDT	Severe Thunderstorm Warning	LMK	Adair, Cumberland, Green, Metcalfe	34 min
Jun 11, 8:09 PM CDT	Severe Thunderstorm Warning	LMK	Cumberland, Metcalfe, Monroe	36 min
Jun 11, 8:53 PM CDT	Severe Thunderstorm Warning	LMK	Clinton	27 min
Jun 11, 9:01 PM CDT	Tornado Warning	LMK	Cumberland	14 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 9.8 hours before the alert went out and 199 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: 2748 J/kg
Mixed-layer CIN: -5 J/kg
Mixed-layer LCL: 587 m above ground
0-6 km bulk shear: 41 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 76 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 4.5

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 7:10 PM CDT	Mesoscale Discussion	SPC	Alexander, Bond, Calhoun, Clay, Clinton, Effingham and 25 more	65 min
Jun 10, 7:46 PM CDT	Tornado Watch	SPC	Alexander, Bond, Calhoun, Champaign, Christian, Clark and 51 more	6 hr
Jun 10, 8:58 PM CDT	Mesoscale Discussion	SPC	Bond, Calhoun, Christian, Clark, Clay, Clinton and 36 more	62 min
Jun 11, 1:00 PM CDT	Mesoscale Discussion	SPC	Bond, Clay, Effingham, Fayette, Macoupin, Montgomery	60 min
Jun 11, 3:07 PM CDT	Mesoscale Discussion	SPC	Clark, Clay, Crawford, Edgar, Edwards, Effingham and 10 more	53 min
Jun 11, 3:42 PM CDT	Mesoscale Discussion	SPC	Clark, Clay, Crawford, Edgar, Edwards, Effingham and 10 more	33 min
Jun 11, 6:02 PM CDT	Mesoscale Discussion	SPC	Alexander, Hardin, Massac, Pope, Pulaski	58 min
Jun 10, 11:06 PM CDT	Tornado Watch	SPC	Bartholomew, Brown, Clark, Clay, Crawford, Daviess and 29 more	5 hr
Jun 11, 3:15 AM CDT	Mesoscale Discussion	SPC	Clark, Crawford, Dubois, Floyd, Harrison, Jefferson and 7 more	60 min
Jun 11, 7:54 AM CDT	Mesoscale Discussion	SPC	Allen, Simpson	66 min
Jun 11, 11:18 AM CDT	Severe Thunderstorm Watch	SPC	Bell, Clay, Harlan, Knox, Laurel, Leslie and 6 more	8 hr
Jun 11, 1:55 PM CDT	Mesoscale Discussion	SPC	Bell, Breathitt, Clay, Floyd, Harlan, Knott and 7 more	65 min

Nearby

Tornado Watches in Kentucky, 2009 Tornado Watches in Indiana, 2009 Tornado Watches in Illinois, 2009 Every tornado watch in 2009

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.