Alert archive / Kentucky / Severe Thunderstorm Watches in 2002

Severe Thunderstorm Watch 137

April 21, 20024 states

The Storm Prediction Center issued this severe thunderstorm watch at Apr 21, 2002, 12:45 PM CDT for 4 states. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Apr 21, 2002, 12:45 PM CDT (17:45 UTC)
Expired: Apr 21, 2002, 6:00 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 87 counties

Hardin County, IL, Clark County, IN, Crawford County, IN, Daviess County, IN, Dubois County, IN, Floyd County, IN, Gibson County, IN, Greene County, IN, Harrison County, IN, Jackson County, IN, Jefferson County, IN, Jennings County, IN, Knox County, IN, Lawrence County, IN, Martin County, IN, Ohio County, IN, Orange County, IN, Perry County, IN, Pike County, IN, Posey County, IN, Ripley County, IN, Scott County, IN, Spencer County, IN, Sullivan County, IN, Switzerland County, IN, Vanderburgh County, IN, Warrick County, IN, Washington County, IN, Anderson County, KY, Bath County, KY, Boone County, KY, Bourbon County, KY, Boyle County, KY, Bracken County, KY, Breckinridge County, KY, Bullitt County, KY, Campbell County, KY, Carroll County, KY, Clark County, KY, Daviess County, KY, Estill County, KY, Fayette County, KY, Fleming County, KY, Franklin County, KY, Gallatin County, KY, Garrard County, KY, Grant County, KY, Grayson County, KY, Hancock County, KY, Hardin County, KY, Harrison County, KY, Henderson County, KY, Henry County, KY, Jackson County, KY, Jefferson County, KY, Jessamine County, KY, Kenton County, KY, Larue County, KY, Lewis County, KY, Lincoln County, KY, Madison County, KY, Marion County, KY, Mason County, KY, McLean County, KY, Meade County, KY, Mercer County, KY, Montgomery County, KY, Nelson County, KY, Nicholas County, KY, Ohio County, KY, Oldham County, KY, Owen County, KY, Pendleton County, KY, Powell County, KY, Robertson County, KY, Scott County, KY, Shelby County, KY, Spencer County, KY, Trimble County, KY, Union County, KY, Washington County, KY, Webster County, KY, Woodford County, KY, Adams County, OH, Brown County, OH, Clermont County, OH, Pike County, OH

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Apr 21, 2:38 PM CDT	Severe Thunderstorm Warning	IND	Daviess, Knox	37 min
Apr 21, 3:12 PM CDT	Severe Thunderstorm Warning	IND	Lawrence, Martin	33 min
Apr 21, 3:51 PM CDT	Severe Thunderstorm Warning	IND	Jackson, Lawrence	24 min
Apr 21, 3:53 PM CDT	Severe Thunderstorm Warning	LMK	Washington	27 min
Apr 21, 4:53 PM CDT	Severe Thunderstorm Warning	PAH	Gibson, Pike, Warrick	22 min
Apr 21, 4:54 PM CDT	Tornado Warning	PAH	Posey	51 min
Apr 21, 4:59 PM CDT	Severe Thunderstorm Warning	LMK	Dubois	31 min
Apr 21, 5:17 PM CDT	Severe Thunderstorm Warning	PAH	Vanderburgh	28 min
Apr 21, 5:26 PM CDT	Tornado Warning	LMK	Crawford, Dubois, Perry	44 min
Apr 21, 5:27 PM CDT	Severe Thunderstorm Warning	LMK	Orange	33 min
Apr 21, 5:29 PM CDT	Tornado Warning	PAH	Spencer	31 min
Apr 21, 5:39 PM CDT	Severe Thunderstorm Warning	PAH	Warrick	36 min
Apr 21, 5:42 PM CDT	Flash Flood Warning	ILN	Adams	93 min
Apr 21, 5:50 PM CDT	Severe Thunderstorm Warning	PAH	Henderson	40 min
Apr 21, 5:53 PM CDT	Tornado Warning	LMK	Harrison	37 min
Apr 21, 5:54 PM CDT	Flash Flood Warning	PAH	Posey, Vanderburgh, Warrick	4 hr
Apr 21, 5:55 PM CDT	Tornado Warning	LMK	Harrison	35 min
Apr 21, 5:56 PM CDT	Flash Flood Warning	LMK	Jefferson, Scott	34 min
Apr 21, 5:57 PM CDT	Flash Flood Warning	LMK	Jefferson, Scott	93 min

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 12:00Z, 5.8 hours before the alert went out and 218 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: 57 J/kg
Mixed-layer CIN: -146 J/kg
Mixed-layer LCL: 1020 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 166 m²/s²
0-3 km storm-relative helicity: 177 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 21, 5:30 AM CDT	Severe Thunderstorm Watch	SPC	Bond, Calhoun, Clinton, Fayette, Greene, Jackson and 9 more	6 hr
Apr 21, 11:00 AM CDT	Severe Thunderstorm Watch	SPC	Alexander, Bond, Calhoun, Clay, Clinton, Crawford and 30 more	5 hr
Apr 21, 2:15 PM CDT	Tornado Watch	SPC	Alexander, Bond, Christian, Clark, Clay, Clinton and 34 more	4 hr
Apr 21, 5:30 PM CDT	Severe Thunderstorm Watch	SPC	Gallatin, Hardin, Johnson, Pope	5 hr
Apr 21, 1:30 PM CDT	Severe Thunderstorm Watch	SPC	Boyd, Breathitt, Carter, Elliott, Floyd, Greenup and 8 more	5 hr

Nearby

Severe Thunderstorm Watches in Kentucky, 2002 Severe Thunderstorm Watches in Indiana, 2002 Severe Thunderstorm Watches in Ohio, 2002 Every severe thunderstorm watch in 2002

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.