Alert archive / Arkansas / Tornado Watches in 2008

Tornado Watch 132

March 18, 20087 states

The Storm Prediction Center issued this tornado watch at Mar 18, 2008, 5:19 PM CDT for 7 states. It was in force for 11 hr.

The area

The outline as issued.

The facts

Issued: Mar 18, 2008, 5:19 PM CDT (22:19 UTC)
Expired: Mar 19, 2008, 4:00 AM CDT
In force: 11 hr
Issued by: the Storm Prediction Center
Largest hail expected: 1 in
Strongest gust expected: 60 kt

All 115 counties

Arkansas County, AR, Bradley County, AR, Calhoun County, AR, Clark County, AR, Clay County, AR, Cleburne County, AR, Cleveland County, AR, Columbia County, AR, Conway County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Greene County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Independence County, AR, Jackson County, AR, Jefferson County, AR, Lafayette County, AR, Lawrence County, AR, Lee County, AR, Lincoln County, AR, Little River County, AR, Lonoke County, AR, Miller County, AR, Mississippi County, AR, Monroe County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Phillips County, AR, Pike County, AR, Poinsett County, AR, Prairie County, AR, Pulaski County, AR, Randolph County, AR, Saline County, AR, Sevier County, AR, St. Francis County, AR, White County, AR, Woodruff County, AR, Gallatin County, IL, Hardin County, IL, Massac County, IL, Pope County, IL, Posey County, IN, Spencer County, IN, Vanderburgh County, IN, Warrick County, IN, Ballard County, KY, Caldwell County, KY, Calloway County, KY, Carlisle County, KY, Christian County, KY, Crittenden County, KY, Daviess County, KY, Fulton County, KY, Graves County, KY, Henderson County, KY, Hickman County, KY, Hopkins County, KY, Livingston County, KY, Lyon County, KY, Marshall County, KY, McCracken County, KY, McLean County, KY, Muhlenberg County, KY, Todd County, KY, Trigg County, KY, Union County, KY, Webster County, KY, Dunklin County, MO, Mississippi County, MO, New Madrid County, MO, Pemiscot County, MO, Carroll County, TN, Crockett County, TN, Dyer County, TN, Fayette County, TN, Gibson County, TN, Haywood County, TN, Henry County, TN, Lake County, TN, Lauderdale County, TN, Madison County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN, Weakley County, TN, Bowie County, TX, Camp County, TX, Cass County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Marion County, TX, Morris County, TX, Rains County, TX, Red River County, TX, Rusk County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

The radar

The Little Rock radar (KLZK), 15 km from the middle of the area, began a volume at 22:20 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: 20%
Ten or more severe wind reports: 80%
One or more gusts of 65 knots or more: 10%
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

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

Issued	Product	Office	Counties	Lasted
Mar 18, 5:24 PM CDT	Tornado Warning	MEG	Craighead, Greene	51 min
Mar 18, 5:30 PM CDT	Tornado Warning	MEG	Clay, Greene	45 min
Mar 18, 6:02 PM CDT	Severe Thunderstorm Warning	MEG	Mississippi	28 min
Mar 18, 6:04 PM CDT	Tornado Warning	MEG	Lake, Obion	41 min
Mar 18, 6:13 PM CDT	Tornado Warning	MEG	Dunklin, Pemiscot	47 min
Mar 18, 6:14 PM CDT	Severe Thunderstorm Warning	LZK	Conway, Faulkner, Lonoke, Perry, Pulaski, White	24 min
Mar 18, 6:18 PM CDT	Severe Thunderstorm Warning	SHV	Howard, Sevier	42 min
Mar 18, 6:38 PM CDT	Tornado Warning	MEG	Craighead, Greene	52 min
Mar 18, 7:19 PM CDT	Tornado Warning	MEG	Craighead, Mississippi	41 min
Mar 18, 7:23 PM CDT	Severe Thunderstorm Warning	LZK	Garland, Saline	37 min
Mar 18, 7:37 PM CDT	Flash Flood Warning	LZK	Cleburne, Conway, Faulkner, Garland, Independence, Jackson and 10 more	6 hr
Mar 18, 7:40 PM CDT	Flash Flood Warning	SHV	Howard, Little River, Sevier	4 hr
Mar 18, 7:49 PM CDT	Severe Thunderstorm Warning	SHV	Cherokee, Rusk, Smith	41 min
Mar 18, 7:50 PM CDT	Severe Thunderstorm Warning	LZK	Pulaski, Saline	40 min
Mar 18, 7:57 PM CDT	Flash Flood Warning	FWD	Delta, Hopkins, Lamar	3 hr
Mar 18, 7:58 PM CDT	Tornado Warning	MEG	Pemiscot	47 min
Mar 18, 8:00 PM CDT	Severe Thunderstorm Warning	MEG	Mississippi	45 min
Mar 18, 8:24 PM CDT	Tornado Warning	MEG	Craighead, Mississippi	51 min
Mar 18, 8:34 PM CDT	Severe Thunderstorm Warning	SHV	Gregg, Harrison, Rusk, Upshur	41 min
Mar 18, 8:45 PM CDT	Flash Flood Warning	LZK	Clark, Hot Spring, Lonoke, Pulaski, Saline, White	6 hr
Mar 18, 9:07 PM CDT	Tornado Warning	SHV	Gregg, Harrison, Marion, Upshur	53 min
Mar 18, 9:17 PM CDT	Severe Thunderstorm Warning	LZK	Grant, Jefferson, Pulaski, Saline	28 min
Mar 18, 9:17 PM CDT	Severe Thunderstorm Warning	SHV	Harrison, Panola, Rusk	43 min
Mar 18, 9:46 PM CDT	Flash Flood Warning	LZK	Dallas, Grant, Jefferson, Prairie, Woodruff	6 hr
Mar 18, 9:52 PM CDT	Severe Thunderstorm Warning	SHV	Cass, Harrison, Marion	23 min
Mar 18, 9:58 PM CDT	Severe Thunderstorm Warning	LZK	Lonoke, Prairie, White	47 min
Mar 18, 10:12 PM CDT	Severe Thunderstorm Warning	LZK	Arkansas, Jefferson, Monroe, Prairie	48 min
Mar 18, 10:17 PM CDT	Flash Flood Warning	MEG	Crittenden, Cross, Lee, Mississippi, Poinsett, St. Francis	9 hr
Mar 18, 10:19 PM CDT	Severe Thunderstorm Warning	SHV	Miller	41 min
Mar 18, 10:29 PM CDT	Severe Thunderstorm Warning	LZK	Monroe, Prairie, Woodruff	46 min
Mar 18, 10:54 PM CDT	Severe Thunderstorm Warning	MEG	Cross, Lee, Phillips, St. Francis	51 min
Mar 18, 10:59 PM CDT	Flash Flood Warning	LZK	Arkansas, Cleveland, Jefferson, Lincoln, Monroe	6 hr
Mar 18, 11:44 PM CDT	Severe Thunderstorm Warning	MEG	Crittenden, Cross, Lee, Phillips, St. Francis	46 min
Mar 19, 12:05 AM CDT	Severe Thunderstorm Warning	MEG	Mississippi, Poinsett	55 min
Mar 19, 12:08 AM CDT	Severe Thunderstorm Warning	MEG	Phillips	52 min
Mar 19, 12:16 AM CDT	Severe Thunderstorm Warning	MEG	Shelby	44 min
Mar 19, 12:28 AM CDT	Severe Thunderstorm Warning	MEG	Crittenden, Lee, Phillips	32 min
Mar 19, 12:43 AM CDT	Flash Flood Warning	MEG	Dyer, Lake, Obion	6 hr
Mar 19, 12:48 AM CDT	Severe Thunderstorm Warning	SHV	Bowie, Camp, Cass, Morris, Red River, Titus	42 min
Mar 19, 12:55 AM CDT	Severe Thunderstorm Warning	MEG	Crockett, Dyer, Gibson, Haywood, Lauderdale, Tipton	65 min
Mar 19, 12:57 AM CDT	Severe Thunderstorm Warning	MEG	Fayette, Shelby	63 min
Mar 19, 1:26 AM CDT	Severe Thunderstorm Warning	MEG	Henry, Obion, Weakley	64 min
Mar 19, 1:33 AM CDT	Severe Thunderstorm Warning	PAH	Calloway	42 min
Mar 19, 1:35 AM CDT	Severe Thunderstorm Warning	MEG	Carroll, Crockett, Gibson, Henderson, Madison, Weakley	55 min
Mar 19, 1:47 AM CDT	Severe Thunderstorm Warning	MEG	Fayette, Hardeman	58 min
Mar 19, 2:01 AM CDT	Severe Thunderstorm Warning	MEG	Chester, Fayette, Hardeman, Haywood, Henderson, Madison	44 min
Mar 19, 2:35 AM CDT	Severe Thunderstorm Warning	LZK	Bradley, Calhoun, Cleveland, Drew	32 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, 10.3 hours before the alert went out and 216 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: 89 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 545 m above ground
0-6 km bulk shear: 59 kt
0-1 km storm-relative helicity: 467 m²/s²
0-3 km storm-relative helicity: 574 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.8

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 17, 7:34 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 11 more	56 min
Mar 17, 9:36 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 20 more	114 min
Mar 17, 10:16 PM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Cleburne, Conway and 31 more	8 hr
Mar 18, 1:13 AM CDT	Mesoscale Discussion	SPC	Washington	62 min
Mar 18, 2:23 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Fulton, Madison and 2 more	2 hr
Mar 18, 2:46 AM CDT	Mesoscale Discussion	SPC	Baxter, Cleburne, Conway, Crawford, Faulkner, Franklin and 27 more	89 min
Mar 18, 5:54 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Madison, Washington	2 hr
Mar 18, 9:26 AM CDT	Mesoscale Discussion	SPC	Calhoun, Clark, Columbia, Conway, Dallas, Garland and 19 more	2 hr
Mar 18, 10:16 AM CDT	Tornado Watch PDS	SPC	Arkansas, Clark, Clay, Cleburne, Cleveland, Columbia and 48 more	7 hr
Mar 18, 10:59 AM CDT	Tornado Watch PDS	SPC	Union	8 hr
Mar 18, 11:54 AM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 6 more	3 hr
Mar 18, 12:10 PM CDT	Mesoscale Discussion	SPC	Arkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 47 more	2 hr
Mar 18, 1:51 PM CDT	Mesoscale Discussion	SPC	Polk, Sevier	3 hr
Mar 18, 3:54 PM CDT	Mesoscale Discussion	SPC	Clark, Cleburne, Columbia, Dallas, Faulkner, Garland and 21 more	2 hr
Mar 18, 4:46 PM CDT	Mesoscale Discussion	SPC	Arkansas, Clark, Clay, Craighead, Crittenden, Cross and 19 more	59 min
Mar 18, 6:06 PM CDT	Mesoscale Discussion	SPC	Clark, Clay, Cleburne, Conway, Craighead, Cross and 20 more	3 hr
Mar 18, 6:47 PM CDT	Tornado Watch	SPC	Union	9 hr
Mar 17, 7:09 PM CDT	Severe Thunderstorm Watch	SPC	Archer, Baylor, Clay, Wichita, Wilbarger	7 hr
Mar 17, 9:17 PM CDT	Mesoscale Discussion	SPC	Bandera, Blanco, Bosque, Brown, Burnet, Callahan and 53 more	58 min
Mar 17, 10:21 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Wichita, Wilbarger	54 min
Mar 17, 11:06 PM CDT	Mesoscale Discussion	SPC	Bandera, Blanco, Bosque, Brown, Burnet, Callahan and 53 more	54 min
Mar 18, 1:32 AM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Concho, Crockett and 9 more	58 min
Mar 18, 1:43 AM CDT	Mesoscale Discussion	SPC	Brown, Callahan, Coke, Coleman, Concho, Crockett and 9 more	32 min
Mar 18, 1:52 AM CDT	Tornado Watch	SPC	Bandera, Blanco, Bosque, Brown, Burnet, Callahan and 34 more	7 hr
Mar 18, 4:57 AM CDT	Mesoscale Discussion	SPC	Bandera, Blanco, Burnet, Coryell, Gillespie, Hamilton and 7 more	93 min
Mar 18, 7:22 AM CDT	Mesoscale Discussion	SPC	Anderson, Austin, Bastrop, Bell, Brazoria, Brazos and 40 more	113 min
Mar 18, 7:50 AM CDT	Mesoscale Discussion	SPC	Bandera, Bosque, Brown, Burnet, Coleman, Comanche and 19 more	55 min
Mar 18, 1:19 PM CDT	Mesoscale Discussion	SPC	Anderson, Austin, Bastrop, Bell, Brazos, Burleson and 37 more	116 min
Mar 18, 6:19 PM CDT	Mesoscale Discussion	SPC	Anderson, Angelina, Chambers, Cherokee, Hardin, Harrison and 16 more	56 min

Nearby

Tornado Watches in Arkansas, 2008 Tornado Watches in Kentucky, 2008 Tornado Watches in Texas, 2008 Every tornado watch in 2008

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.