Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 2552

November 23, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Nov 23, 2003, 3:48 PM CST for 4 states. It was in force for 117 min.

The area

The outline as issued.

The facts

Issued: Nov 23, 2003, 3:48 PM CST (21:48 UTC)
Expired: Nov 23, 2003, 5:45 PM CST
In force: 117 min
Issued by: the Storm Prediction Center

All 40 counties

Chicot County, AR, Desha County, AR, Caldwell Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Benton County, MS, Bolivar County, MS, Carroll County, MS, Coahoma County, MS, DeSoto County, MS, Grenada County, MS, Humphreys County, MS, Issaquena County, MS, Lafayette County, MS, Leflore County, MS, Marshall County, MS, Panola 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, Chester County, TN, Fayette County, TN, Hardeman County, TN, Haywood County, TN, McNairy County, TN, Shelby County, TN

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 9.8 hours before the alert went out and 324 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: 178 J/kg
Mixed-layer CIN: -150 J/kg
Mixed-layer LCL: 578 m above ground
0-6 km bulk shear: 49 kt
0-1 km storm-relative helicity: 373 m²/s²
0-3 km storm-relative helicity: 408 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.4

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
Nov 23, 12:59 PM CST	Mesoscale Discussion	SPC	Arkansas, Ashley, Bradley, Calhoun, Chicot, Clay and 25 more	3 hr
Nov 23, 1:40 PM CST	Severe Thunderstorm Watch	SPC	Arkansas, Ashley, Bradley, Chicot, Crittenden, Cross and 7 more	5 hr
Nov 23, 12:15 PM CST	Mesoscale Discussion	SPC	Beauregard, Bienville, Calcasieu, Grant, Jackson, Lincoln and 6 more	3 hr
Nov 23, 5:38 PM CST	Mesoscale Discussion	SPC	Acadia, Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia and 21 more	97 min

Nearby

Mesoscale Discussions in Mississippi, 2003 Mesoscale Discussions in Louisiana, 2003 Mesoscale Discussions in Tennessee, 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.