Alert archive / Mississippi / Tornado Watches in 2013

Tornado Watch 582

December 21, 201316 counties in Arkansas; 29 counties in Mississippi; 20 counties in Tennessee

The Storm Prediction Center issued this tornado watch at Dec 21, 2013, 12:01 PM CST for 16 counties in Arkansas; 29 counties in Mississippi; 20 counties in Tennessee. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Dec 21, 2013, 12:01 PM CST (18:01 UTC)
Expired: Dec 21, 2013, 8:00 PM CST
In force: 8 hr
Issued by: the Storm Prediction Center
Largest hail expected: 0.5 in
Strongest gust expected: 60 kt

All 65 counties

Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Cleveland County, AR, Crittenden County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Jefferson County, AR, Lee County, AR, Lincoln County, AR, Mississippi County, AR, Monroe County, AR, Ouachita County, AR, Phillips County, AR, St. Francis County, AR, Alcorn County, MS, Benton County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Montgomery County, MS, Panola County, MS, Pontotoc County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tunica County, MS, Union County, MS, Warren County, MS, Washington County, MS, Yalobusha County, MS, Yazoo County, MS, Carroll County, TN, Chester County, TN, Crockett County, TN, Decatur County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Hardeman County, TN, Hardin County, TN, Haywood County, TN, Henderson County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, McNairy County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN

The radar

The Memphis radar (KNQA), 92 km from the middle of the area, began a volume at 18:01 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: 50%
One or more EF2 to EF5 tornadoes: 40%
Ten or more severe wind reports: 60%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 5%
One or more hailstones of 2 inches or more: 5%
Six or more combined severe hail and wind reports: 80%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Dec 21, 12:19 PM CST	Flash Flood Warning	LZK	Jackson, Monroe, Prairie, White, Woodruff	3 hr
Dec 21, 1:15 PM CST	Flash Flood Warning	LZK	Dallas, Grant, Hot Spring, Jefferson, Lonoke, Prairie and 3 more	3 hr
Dec 21, 1:57 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Desha, Drew, Jefferson, Lincoln, Monroe	33 min
Dec 21, 2:11 PM CST	Flash Flood Warning	MEG	Crittenden, Cross, Lee, Mississippi, Poinsett, St. Francis	3 hr
Dec 21, 2:49 PM CST	Severe Thunderstorm Warning	LZK	Desha, Drew, Lincoln	41 min
Dec 21, 2:59 PM CST	Severe Thunderstorm Warning	MEG	Lee, Phillips, St. Francis	46 min
Dec 21, 3:01 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Desha, Jefferson, Lincoln	29 min
Dec 21, 3:08 PM CST	Flash Flood Warning	MEG	Mississippi	6 hr
Dec 21, 3:18 PM CST	Severe Thunderstorm Warning	MEG	Crittenden	42 min
Dec 21, 3:21 PM CST	Tornado Warning	MEG	Crittenden, St. Francis	24 min
Dec 21, 3:26 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Desha, Drew, Lincoln	34 min
Dec 21, 3:27 PM CST	Flash Flood Warning	LZK	Arkansas, Desha, Drew, Lincoln	3 hr
Dec 21, 3:29 PM CST	Flash Flood Warning	MEG	Lee, Phillips	6 hr
Dec 21, 3:38 PM CST	Flash Flood Warning	LZK	Arkansas, Bradley, Calhoun, Cleveland, Dallas, Drew and 8 more	3 hr
Dec 21, 4:00 PM CST	Severe Thunderstorm Warning	MEG	Crockett, Fayette, Haywood, Lauderdale, Shelby, Tipton	45 min
Dec 21, 4:10 PM CST	Severe Thunderstorm Warning	MEG	Crittenden, Lee, Phillips, St. Francis	35 min
Dec 21, 4:12 PM CST	Severe Thunderstorm Warning	MEG	Lauderdale, Tipton	48 min
Dec 21, 4:14 PM CST	Severe Thunderstorm Warning	LZK	Desha, Drew, Lincoln	46 min
Dec 21, 4:15 PM CST	Flash Flood Warning	MEG	Crittenden, Lee, Phillips	3 hr
Dec 21, 4:30 PM CST	Flash Flood Warning	MEG	Clay, Craighead, Cross, Greene, Lawrence, Mississippi and 2 more	4 hr
Dec 21, 4:31 PM CST	Severe Thunderstorm Warning	MEG	Crittenden, St. Francis	44 min
Dec 21, 4:31 PM CST	Severe Thunderstorm Warning	MEG	Crockett, Dyer, Gibson, Lake, Obion, Weakley	44 min
Dec 21, 4:38 PM CST	Severe Thunderstorm Warning	JAN	Bolivar, Washington	52 min
Dec 21, 4:39 PM CST	Severe Thunderstorm Warning	MEG	Crittenden, Lee, Phillips, St. Francis	51 min
Dec 21, 4:40 PM CST	Severe Thunderstorm Warning	LZK	Arkansas, Desha, Drew	50 min
Dec 21, 4:42 PM CST	Severe Thunderstorm Warning	JAN	Issaquena	63 min
Dec 21, 4:48 PM CST	Tornado Warning	JAN	Bolivar, Washington	27 min
Dec 21, 5:00 PM CST	Severe Thunderstorm Warning	MEG	Lee, Phillips	45 min
Dec 21, 5:06 PM CST	Severe Thunderstorm Warning	JAN	Washington	39 min
Dec 21, 5:07 PM CST	Tornado Warning	JAN	Bolivar	23 min
Dec 21, 5:08 PM CST	Severe Thunderstorm Warning	MEG	Crittenden, St. Francis	52 min
Dec 21, 5:12 PM CST	Severe Thunderstorm Warning	MEG	Henry, Weakley	48 min
Dec 21, 5:17 PM CST	Tornado Warning	JAN	Issaquena	43 min
Dec 21, 5:21 PM CST	Flash Flood Warning	MEG	Crittenden, Cross, Lee, Mississippi, Phillips, Poinsett and 1 more	5 hr
Dec 21, 5:22 PM CST	Tornado Warning	MEG	Phillips	23 min
Dec 21, 5:25 PM CST	Severe Thunderstorm Warning	MEG	Crittenden, Lee, Phillips, St. Francis	35 min
Dec 21, 5:25 PM CST	Tornado Warning	JAN	Bolivar	20 min
Dec 21, 5:28 PM CST	Severe Thunderstorm Warning	JAN	Bolivar, Leflore, Sunflower, Washington	62 min
Dec 21, 5:35 PM CST	Tornado Warning	JAN	Issaquena, Sharkey, Washington	40 min
Dec 21, 5:38 PM CST	Tornado Warning	MEG	Coahoma, Panola, Quitman, Tate, Tunica	52 min
Dec 21, 5:45 PM CST	Severe Thunderstorm Warning	MEG	Coahoma, Panola, Quitman, Tallahatchie	30 min
Dec 21, 5:47 PM CST	Severe Thunderstorm Warning	JAN	Humphreys, Leflore, Sunflower	58 min
Dec 21, 5:49 PM CST	Severe Thunderstorm Warning	JAN	Humphreys, Sharkey, Yazoo	56 min
Dec 21, 5:50 PM CST	Severe Thunderstorm Warning	MEG	Coahoma, DeSoto, Marshall, Panola, Quitman, Tate and 1 more	40 min
Dec 21, 5:52 PM CST	Tornado Warning	MEG	DeSoto, Tate, Tunica	38 min
Dec 21, 5:55 PM CST	Tornado Warning	MEG	Panola, Quitman, Tate, Tunica	35 min
Dec 21, 6:01 PM CST	Severe Thunderstorm Warning	MEG	Fayette, Shelby, Tipton	44 min
Dec 21, 6:06 PM CST	Severe Thunderstorm Warning	JAN	Issaquena, Warren	54 min
Dec 21, 6:15 PM CST	Severe Thunderstorm Warning	MEG	Calhoun, Lafayette, Panola, Quitman, Tallahatchie, Yalobusha	45 min
Dec 21, 6:16 PM CST	Severe Thunderstorm Warning	MEG	Crockett, Haywood, Lauderdale, Tipton	44 min
Dec 21, 6:17 PM CST	Tornado Warning	MEG	DeSoto, Marshall, Tate	28 min
Dec 21, 6:22 PM CST	Severe Thunderstorm Warning	MEG	Benton, Lafayette, Marshall, Panola, Tate	38 min
Dec 21, 6:23 PM CST	Severe Thunderstorm Warning	JAN	Holmes, Humphreys, Yazoo	67 min
Dec 21, 6:26 PM CST	Severe Thunderstorm Warning	JAN	Carroll, Grenada	64 min
Dec 21, 6:28 PM CST	Severe Thunderstorm Warning	MEG	Fayette, Hardeman, Haywood	47 min
Dec 21, 6:35 PM CST	Severe Thunderstorm Warning	MEG	Benton, Marshall, Tippah	40 min
Dec 21, 6:37 PM CST	Tornado Warning	MEG	Lafayette, Panola, Tallahatchie, Yalobusha	38 min
Dec 21, 6:43 PM CST	Tornado Warning	MEG	Haywood	32 min
Dec 21, 6:51 PM CST	Tornado Warning	MEG	Crockett, Haywood, Madison	24 min
Dec 21, 6:56 PM CST	Severe Thunderstorm Warning	MEG	Chester, Hardeman, Henderson, McNairy, Madison	49 min
Dec 21, 6:59 PM CST	Severe Thunderstorm Warning	MEG	Benton, Calhoun, Chickasaw, Lafayette, Marshall, Pontotoc and 3 more	46 min
Dec 21, 7:00 PM CST	Tornado Warning	MEG	Alcorn, Benton, Tippah	30 min
Dec 21, 7:02 PM CST	Severe Thunderstorm Warning	MEG	Carroll, Gibson, Henderson, Madison	43 min
Dec 21, 7:09 PM CST	Flash Flood Warning	MEG	Carroll, Crockett, Dyer, Fayette, Gibson, Hardeman and 7 more	5 hr
Dec 21, 7:11 PM CST	Severe Thunderstorm Warning	MEG	Alcorn, Benton, Marshall, Prentiss, Tippah	49 min
Dec 21, 7:12 PM CST	Severe Thunderstorm Warning	MEG	Gibson, Weakley	48 min
Dec 21, 7:14 PM CST	Flash Flood Warning	MEG	Crittenden, Lee, Phillips	3 hr
Dec 21, 7:14 PM CST	Severe Thunderstorm Warning	JAN	Carroll, Grenada, Montgomery	46 min
Dec 21, 7:17 PM CST	Severe Thunderstorm Warning	MEG	Carroll, Henry, Weakley	43 min
Dec 21, 7:19 PM CST	Tornado Warning	MEG	Henry	41 min
Dec 21, 7:30 PM CST	Severe Thunderstorm Warning	MEG	Decatur, Hardin, Henderson	45 min
Dec 21, 7:38 PM CST	Severe Thunderstorm Warning	MEG	Calhoun, Chickasaw, Lafayette, Lee, Pontotoc, Prentiss and 2 more	52 min
Dec 21, 7:48 PM CST	Severe Thunderstorm Warning	MEG	Chester, Hardin, McNairy	27 min
Dec 21, 7:54 PM CST	Severe Thunderstorm Warning	MEG	Alcorn, Prentiss, Tippah, Tishomingo	51 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 (KBYH), launched 12:00Z, 6.0 hours before the alert went out and 47 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: 158 J/kg
Mixed-layer CIN: -96 J/kg
Mixed-layer LCL: 461 m above ground
0-6 km bulk shear: 57 kt
0-1 km storm-relative helicity: 518 m²/s²
0-3 km storm-relative helicity: 610 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.0

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 20, 6:44 PM CST	Mesoscale Discussion	SPC	Clark, Dallas, Garland, Grant, Hempstead, Hot Spring and 11 more	91 min
Dec 20, 8:18 PM CST	Mesoscale Discussion	SPC	Benton	6 hr
Dec 20, 10:42 PM CST	Mesoscale Discussion	SPC	Miller	2 hr
Dec 21, 2:31 AM CST	Mesoscale Discussion	SPC	Clark, Clay, Cleburne, Columbia, Conway, Craighead and 30 more	2 hr
Dec 21, 7:57 AM CST	Mesoscale Discussion	SPC	Ashley, Bradley, Calhoun, Cleveland, Columbia, Drew and 3 more	63 min
Dec 21, 9:46 AM CST	Tornado Watch	SPC	Ashley, Chicot, Columbia, Lafayette, Union	8 hr
Dec 21, 10:45 AM CST	Mesoscale Discussion	SPC	Arkansas, Bradley, Calhoun, Cleveland, Crittenden, Desha and 8 more	60 min
Dec 21, 12:30 PM CST	Mesoscale Discussion	SPC	Ashley, Chicot, Columbia, Lafayette, Union	60 min
Dec 21, 2:50 PM CST	Mesoscale Discussion	SPC	Arkansas, Bradley, Crittenden, Cross, Desha, Drew and 6 more	55 min
Dec 21, 5:06 PM CST	Mesoscale Discussion	SPC	Adams, Alcorn, Amite, Attala, Benton, Bolivar and 47 more	84 min
Dec 21, 5:22 PM CST	Tornado Watch	SPC	Adams, Amite, Attala, Bolivar, Carroll, Choctaw and 40 more	7 hr
Dec 21, 5:46 PM CST	Tornado Watch	SPC	Alcorn, Benton, Calhoun, Chickasaw, Coahoma, DeSoto and 16 more	6 hr
Dec 21, 2:37 AM CST	Mesoscale Discussion	SPC	Audrain, Barton, Benton, Boone, Callaway, Camden and 32 more	4 hr
Dec 21, 12:53 PM CST	Mesoscale Discussion	SPC	Audrain, Barton, Bates, Benton, Boone, Callaway and 39 more	4 hr
Dec 21, 2:35 PM CST	Mesoscale Discussion	SPC	Andrew, Buchanan, Caldwell, Clay, Clinton, DeKalb and 4 more	4 hr

Nearby

Tornado Watches in Mississippi, 2013 Tornado Watches in Tennessee, 2013 Tornado Watches in Arkansas, 2013 Every tornado watch in 2013

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.