Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 410

April 6, 20034 states

The Storm Prediction Center issued this mesoscale discussion at Apr 6, 2003, 10:20 AM CDT for 4 states. It was in force for 55 min.

The area

The outline as issued.

The facts

Issued
Apr 6, 2003, 10:20 AM CDT (15:20 UTC)
Expired
Apr 6, 2003, 11:15 AM CDT
In force
55 min
Issued by
the Storm Prediction Center
All 97 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, Miller County, AR, Nevada County, AR, Ouachita County, AR, Phillips County, AR, Pike County, AR, Sevier County, AR, Union County, AR, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Red River Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Attala County, MS, Bolivar County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Coahoma County, MS, Copiah County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Kemper County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pontotoc County, MS, Quitman County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Warren County, MS, Washington County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Bowie County, TX, Cass County, TX, Harrison County, TX, Marion County, TX, Morris County, TX, Panola County, TX

The watches that followed

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

The nearest sounding before it

Shreveport, LA (KSHV), launched 12:00Z, 3.3 hours before the alert went out and 171 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-pSkew-T log-p diagram, Shreveport, LA at 12:00Z on 2003-04-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1292 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Shreveport, LA at 12:00Z on 2003-04-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 259 square meters per square second.1939587897117Sfc1 km3 km6 km9 kmRMLM
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
1292 J/kg
Mixed-layer CIN
-53 J/kg
Mixed-layer LCL
492 m above ground
0-6 km bulk shear
43 kt
0-1 km storm-relative helicity
259 m²/s²
0-3 km storm-relative helicity
405 m²/s²
Significant tornado parameter
2.5
Supercell composite
20.3

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.

IssuedProductOfficeCountiesLasted
Apr 6, 7:38 AM CDTMesoscale DiscussionSPCAshley, Bradley, Calhoun, Chicot, Columbia, Lafayette and 3 more97 min
Apr 6, 7:50 AM CDTSevere Thunderstorm WatchSPCAshley, Bradley, Calhoun, Chicot, Columbia, Drew and 6 more5 hr
Apr 6, 8:56 AM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 21 more2 hr
Apr 6, 9:45 AM CDTSevere Thunderstorm WatchSPCBaxter, Benton, Boone, Carroll, Conway, Crawford and 22 more5 hr
Apr 6, 10:00 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Chicot, Desha, Drew, Jefferson and 4 more2 hr
Apr 6, 10:30 AM CDTTornado WatchSPCAshley, Bradley, Calhoun, Chicot, Columbia, Drew and 6 more6 hr
Apr 6, 11:05 AM CDTSevere Thunderstorm WatchSPCArkansas, Baxter, Cleburne, Cleveland, Craighead, Crittenden and 27 more5 hr
Apr 6, 12:27 PM CDTMesoscale DiscussionSPCArkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 46 more2 hr
Apr 6, 2:18 PM CDTMesoscale DiscussionSPCBoone, Conway, Crawford, Franklin, Garland, Howard and 16 more57 min
Apr 6, 2:55 PM CDTSevere Thunderstorm WatchSPCBaxter, Boone, Clark, Cleburne, Conway, Crawford and 35 more5 hr
Apr 6, 3:45 PM CDTTornado WatchSPCAshley, Chicot, Union5 hr
Apr 6, 5:35 PM CDTMesoscale DiscussionSPCAshley, Chicot, Union115 min
Apr 6, 6:23 PM CDTMesoscale DiscussionSPCAshley, Chicot, Union97 min
Apr 6, 12:03 PM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 14 more117 min
Apr 6, 3:26 PM CDTMesoscale DiscussionSPCBienville, Caldwell, De Soto, Franklin, Grant, Jackson and 11 more2 hr
Apr 6, 6:50 PM CDTTornado WatchSPCAvoyelles, Caldwell, Catahoula, Concordia, East Carroll, Evangeline and 11 more6 hr
Apr 6, 12:40 PM CDTMesoscale DiscussionSPCAttala, Choctaw, Holmes, Kemper, Lauderdale, Leake and 9 more2 hr
Apr 6, 1:35 PM CDTTornado WatchSPCChoctaw, Clarke, Jasper, Jones, Kemper, Lauderdale and 7 more5 hr
Apr 6, 2:56 PM CDTMesoscale DiscussionSPCKemper, Lauderdale, Leake, Neshoba, Newton, Noxubee and 2 more2 hr
Apr 5, 6:11 PM CSTMesoscale DiscussionSPCBaylor, Briscoe, Cottle, Crosby, Dickens, Floyd and 9 more64 min
Apr 5, 6:35 PM CSTMesoscale DiscussionSPCArcher, Clay, Collin, Cooke, Dallas, Delta and 23 more115 min
Apr 5, 6:40 PM CSTTornado WatchSPCBriscoe, Childress, Cottle, Crosby, Dickens, Fisher and 16 more5 hr
Apr 5, 8:04 PM CSTMesoscale DiscussionSPCArcher, Baylor, Clay, Collin, Cooke, Dallas and 25 more116 min
Apr 5, 9:20 PM CSTMesoscale DiscussionSPCArcher, Camp, Clay, Collin, Cooke, Dallas and 31 more55 min
Apr 5, 9:35 PM CSTTornado WatchSPCArcher, Bowie, Camp, Cass, Clay, Collin and 38 more5 hr
Apr 5, 10:26 PM CSTMesoscale DiscussionSPCBaylor, Childress, Cottle, Dickens, Fisher, Foard and 11 more64 min
Apr 5, 11:43 PM CSTMesoscale DiscussionSPCArcher, Camp, Clay, Collin, Cooke, Dallas and 31 more92 min
Apr 6, 3:13 AM CDTMesoscale DiscussionSPCArcher, Baylor, Camp, Cass, Cherokee, Clay and 39 more107 min
Apr 6, 3:39 AM CDTMesoscale DiscussionSPCArcher, Baylor, Camp, Cass, Cherokee, Clay and 39 more66 min
Apr 6, 4:50 AM CDTMesoscale DiscussionSPCArcher, Baylor, Brown, Callahan, Coke, Coleman and 27 more115 min
Apr 6, 5:35 AM CDTSevere Thunderstorm WatchSPCWichita4 hr
Apr 6, 9:12 AM CDTMesoscale DiscussionSPCAnderson, Bosque, Camp, Cass, Cherokee, Collin and 41 more2 hr
Apr 6, 12:40 PM CDTTornado WatchSPCAnderson, Brazos, Burleson, Cherokee, Collin, Cooke and 33 more5 hr
Apr 6, 3:00 PM CDTMesoscale DiscussionSPCAnderson, Brazos, Cherokee, Delta, Freestone, Grimes and 21 more90 min

Nearby

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