Alert archive / Arkansas / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 508

June 11, 200318 counties in Arkansas; 4 counties in Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at Jun 11, 2003, 6:10 AM CDT for 18 counties in Arkansas; 4 counties in Mississippi. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued: Jun 11, 2003, 6:10 AM CDT (11:10 UTC)
Expired: Jun 11, 2003, 11:00 AM CDT
In force: 5 hr
Issued by: the Storm Prediction Center

All 22 counties

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, Hempstead County, AR, Lafayette County, AR, Lincoln County, AR, Miller County, AR, Nevada County, AR, Ouachita County, AR, Pike County, AR, Union County, AR, Bolivar County, MS, Humphreys County, MS, Sunflower County, MS, Washington County, MS

The radar

The Little Rock radar (KLZK), 155 km from the middle of the area, began a volume at 11:12 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.

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Jun 11, 6:23 AM CDT	Severe Thunderstorm Warning	SHV	Columbia, Nevada	37 min
Jun 11, 6:47 AM CDT	Severe Thunderstorm Warning	LZK	Ouachita	28 min
Jun 11, 7:17 AM CDT	Severe Thunderstorm Warning	LZK	Dallas	28 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 00:00Z, 11.2 hours before the alert went out and 159 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: 2842 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 1348 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 46 m²/s²
0-3 km storm-relative helicity: 91 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 5.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 10, 9:38 PM CDT	Mesoscale Discussion	SPC	Benton, Crawford, Franklin, Polk, Scott, Sebastian and 1 more	2 hr
Jun 11, 1:48 AM CDT	Mesoscale Discussion	SPC	Baxter, Boone, Carroll, Clark, Columbia, Conway and 37 more	3 hr
Jun 11, 4:53 AM CDT	Mesoscale Discussion	SPC	Arkansas, Bradley, Chicot, Clay, Cleburne, Cleveland and 25 more	3 hr
Jun 11, 7:54 AM CDT	Mesoscale Discussion	SPC	Ashley, Bradley, Calhoun, Chicot, Clark, Cleveland and 12 more	2 hr
Jun 11, 1:53 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 19 more	67 min
Jun 11, 9:21 AM CDT	Mesoscale Discussion	SPC	Alcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 44 more	54 min
Jun 11, 10:33 AM CDT	Mesoscale Discussion	SPC	Amite, Attala, Claiborne, Clarke, Copiah, Covington and 28 more	87 min
Jun 11, 10:45 AM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Benton, Calhoun, Carroll, Chickasaw, Choctaw and 24 more	5 hr
Jun 11, 12:26 PM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Calhoun, Carroll, Chickasaw, Choctaw and 24 more	64 min
Jun 11, 3:01 PM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Calhoun, Carroll, Chickasaw, Choctaw and 24 more	29 min
Jun 11, 3:30 PM CDT	Severe Thunderstorm Watch	SPC	Alcorn, Benton, Bolivar, Calhoun, Chickasaw, Coahoma and 17 more	5 hr
Jun 11, 4:57 PM CDT	Mesoscale Discussion	SPC	Alcorn, Benton, Calhoun, Chickasaw, Itawamba, Lafayette and 12 more	93 min

Nearby

Severe Thunderstorm Watches in Arkansas, 2003 Severe Thunderstorm Watches in Mississippi, 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; radar from the NEXRAD Level II archive.