Alert archive / Arkansas / Mesoscale Discussions in 2003

Mesoscale Discussion 2105

August 6, 200333 counties in Arkansas; West Carroll Parish, Louisiana; 9 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Aug 6, 2003, 12:36 PM CDT for 33 counties in Arkansas; West Carroll Parish, Louisiana; 9 counties in Mississippi. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued: Aug 6, 2003, 12:36 PM CDT (17:36 UTC)
Expired: Aug 6, 2003, 2:30 PM CDT
In force: 114 min
Issued by: the Storm Prediction Center

All 43 counties

Arkansas County, AR, Ashley County, AR, Bradley County, AR, Chicot County, AR, Cleburne County, AR, Cleveland County, AR, Conway County, AR, Dallas County, AR, Desha County, AR, Drew County, AR, Faulkner County, AR, Garland County, AR, Grant County, AR, Hot Spring County, AR, Jefferson County, AR, Johnson County, AR, Lee County, AR, Lincoln County, AR, Lonoke County, AR, Monroe County, AR, Newton County, AR, Perry County, AR, Phillips County, AR, Pope County, AR, Prairie County, AR, Pulaski County, AR, Saline County, AR, Searcy County, AR, Stone County, AR, Van Buren County, AR, White County, AR, Woodruff County, AR, Yell County, AR, West Carroll Parish, LA, Bolivar County, MS, Coahoma County, MS, Humphreys County, MS, Leflore County, MS, Quitman County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Washington County, MS

The radar

The Little Rock radar (KLZK), 45 km from the middle of the area, began a volume at 17:35 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.

The watches that followed

Watches SPC issued over any of the same counties within four hours of this discussion.

The nearest sounding before it

Little Rock, AR (KLZK), launched 12:00Z, 5.6 hours before the alert went out and 191 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: 1204 J/kg
Mixed-layer CIN: -124 J/kg
Mixed-layer LCL: 1200 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 112 m²/s²
0-3 km storm-relative helicity: 96 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 6.1

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Aug 6, 1:50 PM CDT	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 27 more	5 hr
Aug 6, 2:27 PM CDT	Mesoscale Discussion	SPC	Craighead, Crittenden, Cross, Greene, Lee, Mississippi and 3 more	2 hr
Aug 6, 5:37 PM CDT	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clark and 27 more	83 min
Aug 6, 3:45 PM CDT	Severe Thunderstorm Watch	SPC	Attala, Bolivar, Carroll, Clarke, Hinds, Holmes and 23 more	5 hr

Nearby

Mesoscale Discussions in Arkansas, 2003 Mesoscale Discussions in Mississippi, 2003 Mesoscale Discussions in Louisiana, 2003 Every mesoscale discussion 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.