Alert archive / Tennessee / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 786

July 21, 200340 counties in Kentucky; 51 counties in Tennessee

The Storm Prediction Center issued this severe thunderstorm watch at Jul 21, 2003, 11:55 AM CDT for 40 counties in Kentucky; 51 counties in Tennessee. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Jul 21, 2003, 11:55 AM CDT (16:55 UTC)
Expired: Jul 21, 2003, 6:00 PM CDT
In force: 6 hr
Issued by: the Storm Prediction Center

All 91 counties

Adair County, KY, Allen County, KY, Barren County, KY, Boyle County, KY, Butler County, KY, Caldwell County, KY, Calloway County, KY, Casey County, KY, Christian County, KY, Clinton County, KY, Crittenden County, KY, Cumberland County, KY, Edmonson County, KY, Garrard County, KY, Grayson County, KY, Green County, KY, Hardin County, KY, Hart County, KY, Hopkins County, KY, Larue County, KY, Lincoln County, KY, Logan County, KY, Lyon County, KY, Marion County, KY, Marshall County, KY, McLean County, KY, Metcalfe County, KY, Monroe County, KY, Muhlenberg County, KY, Ohio County, KY, Pulaski County, KY, Russell County, KY, Simpson County, KY, Taylor County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Warren County, KY, Wayne County, KY, Webster County, KY, Bedford County, TN, Benton County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Coffee County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Fayette County, TN, Franklin County, TN, Gibson County, TN, Giles County, TN, Grundy County, TN, Hardeman County, TN, Hardin County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lawrence County, TN, Lewis County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Moore County, TN, Overton County, TN, Perry 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, Weakley County, TN, White County, TN, Williamson County, TN, Wilson County, TN

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jul 21, 12:11 PM CDT	Severe Thunderstorm Warning	OHX	Perry	64 min
Jul 21, 12:21 PM CDT	Severe Thunderstorm Warning	LMK	Butler, Edmonson, Grayson	39 min
Jul 21, 12:41 PM CDT	Severe Thunderstorm Warning	MEG	Henderson	34 min
Jul 21, 12:45 PM CDT	Severe Thunderstorm Warning	PAH	Christian	45 min
Jul 21, 12:49 PM CDT	Severe Thunderstorm Warning	MEG	Decatur, Hardin	41 min
Jul 21, 12:49 PM CDT	Severe Thunderstorm Warning	OHX	Hickman	41 min
Jul 21, 1:01 PM CDT	Severe Thunderstorm Warning	OHX	Lewis, Wayne	59 min
Jul 21, 1:14 PM CDT	Severe Thunderstorm Warning	PAH	Todd	46 min
Jul 21, 1:26 PM CDT	Severe Thunderstorm Warning	PAH	Christian	34 min
Jul 21, 1:26 PM CDT	Severe Thunderstorm Warning	MEG	Hardin, McNairy	34 min
Jul 21, 1:29 PM CDT	Severe Thunderstorm Warning	OHX	Lawrence	61 min
Jul 21, 1:30 PM CDT	Tornado Warning	PAH	Todd	30 min
Jul 21, 1:32 PM CDT	Severe Thunderstorm Warning	LMK	Warren	43 min
Jul 21, 1:35 PM CDT	Severe Thunderstorm Warning	OHX	Williamson	40 min
Jul 21, 1:37 PM CDT	Severe Thunderstorm Warning	LMK	Logan	38 min
Jul 21, 1:40 PM CDT	Severe Thunderstorm Warning	OHX	Maury	50 min
Jul 21, 1:43 PM CDT	Severe Thunderstorm Warning	LMK	Simpson	42 min
Jul 21, 1:57 PM CDT	Tornado Warning	PAH	Todd	33 min
Jul 21, 2:00 PM CDT	Severe Thunderstorm Warning	OHX	Davidson	45 min
Jul 21, 2:05 PM CDT	Tornado Warning	OHX	Sumner	40 min
Jul 21, 2:08 PM CDT	Severe Thunderstorm Warning	OHX	Giles, Marshall	67 min
Jul 21, 2:17 PM CDT	Severe Thunderstorm Warning	OHX	Macon, Sumner, Trousdale	58 min
Jul 21, 2:24 PM CDT	Severe Thunderstorm Warning	OHX	Rutherford, Wilson	51 min
Jul 21, 2:28 PM CDT	Severe Thunderstorm Warning	OHX	Smith	62 min
Jul 21, 2:37 PM CDT	Severe Thunderstorm Warning	LMK	Barren, Monroe	38 min
Jul 21, 2:42 PM CDT	Severe Thunderstorm Warning	OHX	Bedford	48 min
Jul 21, 2:46 PM CDT	Severe Thunderstorm Warning	OHX	Cannon	74 min
Jul 21, 3:13 PM CDT	Severe Thunderstorm Warning	OHX	Clay, Jackson	62 min
Jul 21, 3:19 PM CDT	Severe Thunderstorm Warning	PAH	Christian, Todd	41 min
Jul 21, 3:26 PM CDT	Severe Thunderstorm Warning	OHX	Cannon, Coffee, DeKalb, Moore, Warren	64 min
Jul 21, 3:33 PM CDT	Severe Thunderstorm Warning	OHX	Putnam	72 min
Jul 21, 3:45 PM CDT	Severe Thunderstorm Warning	OHX	Grundy, Van Buren, White	60 min
Jul 21, 4:26 PM CDT	Severe Thunderstorm Warning	LMK	Logan	34 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, 4.9 hours before the alert went out and 67 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: 1467 J/kg
Mixed-layer CIN: -175 J/kg
Mixed-layer LCL: 1108 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 42 m²/s²
0-3 km storm-relative helicity: 117 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
Jul 21, 5:03 AM CDT	Mesoscale Discussion	SPC	Boone, Campbell, Carroll, Gallatin, Grant, Henry and 5 more	117 min
Jul 21, 5:10 AM CDT	Severe Thunderstorm Watch	SPC	Boone, Bracken, Campbell, Carroll, Gallatin, Grant and 2 more	6 hr
Jul 21, 6:39 AM CDT	Mesoscale Discussion	SPC	Boyd, Bracken, Carter, Fleming, Greenup, Harrison and 5 more	96 min
Jul 21, 7:03 AM CDT	Mesoscale Discussion	SPC	Allen, Anderson, Barren, Breckinridge, Bullitt, Butler and 31 more	117 min
Jul 21, 7:40 AM CDT	Severe Thunderstorm Watch	SPC	Bath, Boyd, Carter, Elliott, Greenup, Lawrence and 3 more	5 hr
Jul 21, 10:27 AM CDT	Mesoscale Discussion	SPC	Boone, Breckinridge, Bullitt, Butler, Caldwell, Carroll and 33 more	2 hr
Jul 21, 1:41 PM CDT	Mesoscale Discussion	SPC	Bell, Floyd, Harlan, Knott, Leslie, Letcher and 3 more	64 min
Jul 21, 3:14 PM CDT	Mesoscale Discussion	SPC	Allen, Christian, Cumberland, Logan, Monroe, Muhlenberg and 3 more	2 hr
Jul 21, 3:50 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Bledsoe, Blount, Bradley, Campbell, Claiborne and 21 more	4 hr

Nearby

Severe Thunderstorm Watches in Tennessee, 2003 Severe Thunderstorm Watches in Kentucky, 2003 Every severe thunderstorm watch in 2003

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.