Alert archive / Kentucky / Tornado Watches in 2009

Tornado Watch 119

April 5, 20094 states

The Storm Prediction Center issued this tornado watch at Apr 5, 2009, 6:37 PM EDT for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Apr 5, 2009, 6:37 PM EDT (22:37 UTC)
Expired: Apr 5, 2009, 11:31 PM EDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1 in
Strongest gust expected: 60 kt

All 146 counties

Bartholomew County, IN, Clark County, IN, Crawford County, IN, Dearborn County, IN, Decatur County, IN, Fayette County, IN, Floyd County, IN, Franklin County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Ohio County, IN, Orange County, IN, Perry County, IN, Ripley County, IN, Rush County, IN, Scott County, IN, Switzerland County, IN, Union County, IN, Washington County, IN, Wayne County, IN, Adair County, KY, Allen County, KY, Anderson County, KY, Barren County, KY, Boone County, KY, Bourbon County, KY, Boyle County, KY, Bracken County, KY, Breckinridge County, KY, Bullitt County, KY, Butler County, KY, Campbell County, KY, Carroll County, KY, Casey County, KY, Clark County, KY, Clinton County, KY, Cumberland County, KY, Edmonson County, KY, Fayette County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Grayson County, KY, Green County, KY, Hancock County, KY, Hardin County, KY, Harrison County, KY, Hart County, KY, Henry County, KY, Jefferson County, KY, Jessamine County, KY, Kenton County, KY, Larue County, KY, Lewis County, KY, Lincoln County, KY, Logan County, KY, Madison County, KY, Marion County, KY, Mason County, KY, Meade County, KY, Mercer County, KY, Metcalfe County, KY, Monroe County, KY, Nelson County, KY, Nicholas County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Robertson County, KY, Russell County, KY, Scott County, KY, Shelby County, KY, Simpson County, KY, Spencer County, KY, Taylor County, KY, Trimble County, KY, Warren County, KY, Washington County, KY, Woodford County, KY, Adams County, OH, Brown County, OH, Butler County, OH, Champaign County, OH, Clark County, OH, Clermont County, OH, Clinton County, OH, Darke County, OH, Delaware County, OH, Fairfield County, OH, Fayette County, OH, Franklin County, OH, Greene County, OH, Hamilton County, OH, Highland County, OH, Hocking County, OH, Licking County, OH, Madison County, OH, Miami County, OH, Montgomery County, OH, Pickaway County, OH, Pike County, OH, Preble County, OH, Ross County, OH, Scioto County, OH, Union County, OH, Warren County, OH, Bedford County, TN, Cannon County, TN, Cheatham County, TN, Clay County, TN, Coffee County, TN, Cumberland County, TN, Davidson County, TN, DeKalb County, TN, Dickson County, TN, Fentress County, TN, Giles County, TN, Grundy County, TN, Hickman County, TN, Houston County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Marshall County, TN, Maury County, TN, Montgomery County, TN, Overton County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Trousdale County, TN, Van Buren County, TN, Warren County, TN, Wayne County, TN, White County, TN, Williamson County, TN, Wilson County, TN

The radar

The Louisville radar (KLVX), 28 km from the middle of the area, began a volume at 22:38 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: 70%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 5%
Six or more combined severe hail and wind reports: 95%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Apr 5, 6:41 PM EDT	Severe Thunderstorm Warning	LMK	Breckinridge, Butler, Grayson, Hancock, Logan, Ohio and 1 more	34 min
Apr 5, 6:43 PM EDT	Tornado Warning	ILN	Franklin, Ripley	25 min
Apr 5, 6:43 PM EDT	Tornado Warning	IND	Decatur	18 min
Apr 5, 6:47 PM EDT	Severe Thunderstorm Warning	OHX	Cheatham, Dickson, Houston, Humphreys, Montgomery, Stewart	28 min
Apr 5, 6:59 PM EDT	Severe Thunderstorm Warning	LMK	Crawford, Harrison, Perry	31 min
Apr 5, 7:06 PM EDT	Severe Thunderstorm Warning	LMK	Breckinridge, Grayson	24 min
Apr 5, 7:24 PM EDT	Severe Thunderstorm Warning	LMK	Anderson, Larue, Marion, Nelson, Spencer, Washington	33 min
Apr 5, 7:28 PM EDT	Severe Thunderstorm Warning	LMK	Harrison	32 min
Apr 5, 7:34 PM EDT	Severe Thunderstorm Warning	LMK	Clark, Floyd, Harrison	26 min
Apr 5, 7:37 PM EDT	Severe Thunderstorm Warning	OHX	Wayne	23 min
Apr 5, 7:39 PM EDT	Severe Thunderstorm Warning	LMK	Clark, Floyd, Jefferson, Scott	36 min
Apr 5, 7:40 PM EDT	Severe Thunderstorm Warning	LMK	Allen, Barren, Butler, Edmonson, Grayson, Green and 4 more	35 min
Apr 5, 7:49 PM EDT	Severe Thunderstorm Warning	OHX	Lawrence	26 min
Apr 5, 8:13 PM EDT	Severe Thunderstorm Warning	LMK	Adair, Allen, Barren, Green, Hart, Larue and 4 more	32 min
Apr 5, 8:25 PM EDT	Severe Thunderstorm Warning	OHX	Sumner	20 min
Apr 5, 8:27 PM EDT	Severe Thunderstorm Warning	LMK	Anderson, Shelby, Spencer	16 min
Apr 5, 8:27 PM EDT	Severe Thunderstorm Warning	LMK	Boyle, Casey, Lincoln, Marion, Mercer	33 min
Apr 5, 8:35 PM EDT	Severe Thunderstorm Warning	LMK	Adair, Casey, Clinton, Cumberland, Lincoln, Metcalfe and 3 more	25 min
Apr 5, 8:36 PM EDT	Severe Thunderstorm Warning	LMK	Bourbon, Fayette, Jessamine	24 min
Apr 5, 8:36 PM EDT	Tornado Warning	OHX	Macon	24 min
Apr 5, 8:39 PM EDT	Tornado Warning	LMK	Allen, Monroe	16 min
Apr 5, 8:54 PM EDT	Severe Thunderstorm Warning	LMK	Boyle, Garrard, Jessamine, Madison, Mercer	36 min
Apr 5, 8:56 PM EDT	Severe Thunderstorm Warning	LMK	Bourbon, Clark, Fayette	34 min
Apr 5, 8:56 PM EDT	Severe Thunderstorm Warning	LMK	Cumberland, Metcalfe, Monroe	20 min
Apr 5, 9:00 PM EDT	Severe Thunderstorm Warning	LMK	Adair, Casey, Lincoln, Russell	30 min
Apr 5, 9:12 PM EDT	Tornado Warning	LMK	Casey, Lincoln	16 min
Apr 5, 9:13 PM EDT	Severe Thunderstorm Warning	LMK	Clark, Fayette, Madison	28 min
Apr 5, 9:13 PM EDT	Severe Thunderstorm Warning	LMK	Bourbon, Nicholas	32 min
Apr 5, 9:14 PM EDT	Severe Thunderstorm Warning	LMK	Clinton, Cumberland, Russell	31 min
Apr 5, 10:02 PM EDT	Severe Thunderstorm Warning	ILN	Lewis	43 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, 10.6 hours before the alert went out and 194 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: 1419 m above ground
0-6 km bulk shear: 54 kt
0-1 km storm-relative helicity: 140 m²/s²
0-3 km storm-relative helicity: 270 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Apr 5, 11:50 AM EDT	Mesoscale Discussion	SPC	Benton, Blackford, Boone, Brown, Carroll, Cass and 52 more	115 min
Apr 5, 12:44 PM EDT	Tornado Watch	SPC	Bartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 26 more	6 hr
Apr 5, 3:02 PM EDT	Mesoscale Discussion	SPC	Bartholomew, Brown, Clark, Crawford, Daviess, Dearborn and 26 more	88 min
Apr 5, 6:10 PM EDT	Mesoscale Discussion	SPC	Clark, Dearborn, Floyd, Franklin, Harrison, Jefferson and 6 more	65 min
Apr 5, 7:19 PM EDT	Mesoscale Discussion	SPC	Bedford, Cannon, Coffee, DeKalb, Franklin, Giles and 14 more	86 min

Nearby

Tornado Watches in Kentucky, 2009 Tornado Watches in Tennessee, 2009 Tornado Watches in Ohio, 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.