Alert archive / Tennessee / Severe Thunderstorm Watches in 2004

Severe Thunderstorm Watch 30

March 20, 20045 states

The Storm Prediction Center issued this severe thunderstorm watch at Mar 20, 2004, 11:50 AM CST for 5 states. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Mar 20, 2004, 11:50 AM CST (17:50 UTC)
Expired: Mar 20, 2004, 6:00 PM CST
In force: 6 hr
Issued by: the Storm Prediction Center

All 77 counties

Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Poinsett County, AR, St. Francis County, AR, Allen County, KY, Clinton County, KY, Cumberland County, KY, Monroe County, KY, Dunklin County, MO, Pemiscot County, MO, DeSoto County, MS, Bedford County, TN, Benton County, TN, Bledsoe County, TN, Cannon County, TN, Carroll County, TN, Cheatham County, TN, Chester County, TN, Clay County, TN, Coffee County, TN, Crockett County, TN, Davidson County, TN, Decatur County, TN, DeKalb County, TN, Dickson County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Giles County, TN, Grundy County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Hickman County, TN, Houston County, TN, Humphreys County, TN, Jackson County, TN, Lake County, TN, Lauderdale County, TN, Lawrence County, TN, Lewis County, TN, Lincoln County, TN, Macon County, TN, Madison County, TN, Marshall County, TN, Maury County, TN, McNairy County, TN, Montgomery County, TN, Moore County, TN, Obion County, TN, Overton County, TN, Perry County, TN, Pickett County, TN, Putnam County, TN, Robertson County, TN, Rutherford County, TN, Sequatchie County, TN, Shelby County, TN, Smith County, TN, Stewart County, TN, Sumner County, TN, Tipton 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

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

Issued	Product	Office	Counties	Lasted
Mar 20, 12:13 PM CST	Severe Thunderstorm Warning	OHX	Stewart	62 min
Mar 20, 12:28 PM CST	Severe Thunderstorm Warning	MEG	Gibson, Obion, Weakley	47 min
Mar 20, 12:53 PM CST	Severe Thunderstorm Warning	MEG	Craighead, Mississippi	52 min
Mar 20, 12:58 PM CST	Severe Thunderstorm Warning	OHX	Montgomery	62 min
Mar 20, 1:04 PM CST	Severe Thunderstorm Warning	MEG	Poinsett	41 min
Mar 20, 1:12 PM CST	Severe Thunderstorm Warning	MEG	Dyer	33 min
Mar 20, 1:13 PM CST	Severe Thunderstorm Warning	OHX	Stewart	62 min
Mar 20, 1:15 PM CST	Severe Thunderstorm Warning	OHX	Benton	45 min
Mar 20, 1:30 PM CST	Tornado Warning	OHX	Stewart	45 min
Mar 20, 1:31 PM CST	Severe Thunderstorm Warning	MEG	Crockett, Gibson	44 min
Mar 20, 1:36 PM CST	Severe Thunderstorm Warning	OHX	Robertson	54 min
Mar 20, 1:41 PM CST	Flash Flood Warning	OHX	Stewart	2 hr
Mar 20, 1:41 PM CST	Severe Thunderstorm Warning	OHX	Sumner	34 min
Mar 20, 1:45 PM CST	Severe Thunderstorm Warning	OHX	Houston	60 min
Mar 20, 1:58 PM CST	Severe Thunderstorm Warning	OHX	Montgomery	62 min
Mar 20, 2:07 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Humphreys	38 min
Mar 20, 2:10 PM CST	Severe Thunderstorm Warning	OHX	Dickson, Humphreys	35 min
Mar 20, 2:11 PM CST	Severe Thunderstorm Warning	OHX	Smith, Wilson	49 min
Mar 20, 2:19 PM CST	Severe Thunderstorm Warning	MEG	Madison	41 min
Mar 20, 2:32 PM CST	Severe Thunderstorm Warning	OHX	Cheatham, Robertson	43 min
Mar 20, 2:39 PM CST	Flash Flood Warning	OHX	Sumner	2 hr
Mar 20, 2:42 PM CST	Severe Thunderstorm Warning	OHX	Davidson, Sumner	33 min
Mar 20, 2:47 PM CST	Severe Thunderstorm Warning	OHX	Williamson	43 min
Mar 20, 2:55 PM CST	Severe Thunderstorm Warning	OHX	Jackson, Overton	35 min
Mar 20, 3:13 PM CST	Severe Thunderstorm Warning	MEG	Dyer, Obion	32 min
Mar 20, 3:19 PM CST	Severe Thunderstorm Warning	OHX	Rutherford, Wilson	41 min
Mar 20, 3:40 PM CST	Severe Thunderstorm Warning	MEG	Mississippi	50 min
Mar 20, 3:50 PM CST	Severe Thunderstorm Warning	OHX	Cannon, DeKalb, Warren	55 min
Mar 20, 4:09 PM CST	Severe Thunderstorm Warning	OHX	White	31 min
Mar 20, 4:25 PM CST	Severe Thunderstorm Warning	MEG	Madison	35 min
Mar 20, 4:33 PM CST	Severe Thunderstorm Warning	MEG	Crittenden	42 min
Mar 20, 4:48 PM CST	Severe Thunderstorm Warning	MEG	Greene	27 min
Mar 20, 4:59 PM CST	Severe Thunderstorm Warning	MEG	Shelby	61 min
Mar 20, 5:38 PM CST	Flash Flood Warning	MEG	Crittenden	2 hr
Mar 20, 5:47 PM CST	Severe Thunderstorm Warning	MEG	Crittenden	28 min
Mar 20, 5:57 PM CST	Severe Thunderstorm Warning	MEG	DeSoto	48 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

Little Rock, AR (KLZK), launched 12:00Z, 5.8 hours before the alert went out and 160 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: 320 J/kg
Mixed-layer CIN: -329 J/kg
Mixed-layer LCL: 818 m above ground
0-6 km bulk shear: 22 kt
0-1 km storm-relative helicity: 107 m²/s²
0-3 km storm-relative helicity: 209 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 20, 2:09 PM CST	Mesoscale Discussion	SPC	Craighead, Mississippi	66 min
Mar 20, 3:38 PM CST	Mesoscale Discussion	SPC	Arkansas, Clark, Cleburne, Conway, Crawford, Dallas and 28 more	2 hr
Mar 20, 5:05 PM CST	Mesoscale Discussion	SPC	Clark, Conway, Faulkner, Garland, Hempstead, Hot Spring and 11 more	85 min
Mar 20, 5:10 PM CST	Mesoscale Discussion	SPC	Crittenden, Cross, Mississippi, Poinsett, St. Francis	65 min
Mar 20, 9:20 AM CST	Mesoscale Discussion	SPC	Ballard, Breckinridge, Caldwell, Carlisle, Crittenden, Daviess and 14 more	85 min

Nearby

Severe Thunderstorm Watches in Tennessee, 2004 Severe Thunderstorm Watches in Arkansas, 2004 Severe Thunderstorm Watches in Kentucky, 2004 Every severe thunderstorm watch in 2004

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.