Alert archive / Arkansas / Tornado Watches in 2008

Tornado Watch 292

May 10, 200835 counties in Arkansas; 17 parishes in Louisiana; 18 counties in Mississippi

The Storm Prediction Center issued this tornado watch at May 10, 2008, 10:11 AM CDT for 35 counties in Arkansas; 17 parishes in Louisiana; 18 counties in Mississippi. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: May 10, 2008, 10:11 AM CDT (15:11 UTC)
Expired: May 10, 2008, 3:38 PM CDT
In force: 5 hr
Issued by: the Storm Prediction Center
Largest hail expected: 2 in
Strongest gust expected: 60 kt

All 70 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Clark County, AR, Cleveland County, AR, Columbia County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Garland County, AR, Grant County, AR, Hempstead County, AR, Hot Spring County, AR, Howard County, AR, Jefferson County, AR, Lafayette County, AR, Lincoln County, AR, Little River County, AR, Logan County, AR, Lonoke County, AR, Miller County, AR, Montgomery County, AR, Nevada County, AR, Ouachita County, AR, Perry County, AR, Pike County, AR, Polk County, AR, Pulaski County, AR, Saline County, AR, Scott County, AR, Sevier County, AR, Union County, AR, Yell County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Claiborne Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Jackson Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Bolivar County, MS, Carroll County, MS, Claiborne County, MS, Copiah County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Leflore County, MS, Madison County, MS, Rankin County, MS, Sharkey County, MS, Simpson County, MS, Sunflower County, MS, Warren County, MS, Washington County, MS, Yazoo County, MS

The radar

The Little Rock radar (KLZK), 122 km from the middle of the area, began a volume at 15:14 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: 40%
One or more EF2 to EF5 tornadoes: 30%
Ten or more severe wind reports: 30%
One or more gusts of 65 knots or more: 20%
Ten or more severe hail reports: 40%
One or more hailstones of 2 inches or more: 30%
Six or more combined severe hail and wind reports: 70%

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
May 10, 3:24 PM CDT	Severe Thunderstorm Warning	LZK	Logan, Scott	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

Shreveport, LA (KSHV), launched 12:00Z, 3.2 hours before the alert went out and 181 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: 1370 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 917 m above ground
0-6 km bulk shear: 47 kt
0-1 km storm-relative helicity: 75 m²/s²
0-3 km storm-relative helicity: 211 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.4

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 10, 4:05 AM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Carroll, Clay, Cleburne, Craighead and 21 more	115 min
May 10, 7:36 AM CDT	Mesoscale Discussion	SPC	Benton, Carroll, Crawford, Franklin, Hempstead, Howard and 12 more	2 hr
May 10, 9:40 AM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 37 more	65 min
May 10, 10:55 AM CDT	Mesoscale Discussion	SPC	Benton, Boone, Carroll, Crawford, Franklin, Johnson and 7 more	2 hr
May 10, 11:29 AM CDT	Tornado Watch	SPC	Baxter, Benton, Boone, Carroll, Conway, Crawford and 15 more	9 hr
May 10, 12:34 PM CDT	Mesoscale Discussion	SPC	Clay, Craighead, Fulton, Greene, Independence, Lawrence and 4 more	116 min
May 10, 2:23 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 25 more	97 min
May 10, 3:36 PM CDT	Tornado Watch PDS	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 36 more	4 hr
May 10, 4:27 PM CDT	Tornado Watch	SPC	Clay, Craighead, Crittenden, Cross, Greene, Lawrence and 6 more	10 hr
May 10, 5:13 PM CDT	Mesoscale Discussion	SPC	Baxter, Benton, Boone, Carroll, Crawford, Franklin and 9 more	2 hr
May 10, 6:22 PM CDT	Mesoscale Discussion	SPC	Arkansas, Bradley, Calhoun, Chicot, Clark, Cleveland and 28 more	83 min
May 10, 6:51 PM CDT	Tornado Watch PDS	SPC	Arkansas, Ashley, Baxter, Boone, Bradley, Calhoun and 50 more	7 hr
May 9, 11:08 PM CDT	Mesoscale Discussion	SPC	Alcorn, Calhoun, Chickasaw, Choctaw, Clay, Itawamba and 13 more	2 hr
May 10, 2:28 PM CDT	Mesoscale Discussion	SPC	Choctaw, Clay, Lowndes, Monroe, Noxubee, Oktibbeha and 2 more	2 hr

Nearby

Tornado Watches in Arkansas, 2008 Tornado Watches in Mississippi, 2008 Tornado Watches in Louisiana, 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.