Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 568

April 24, 2003Chicot County, Arkansas; 8 parishes in Louisiana; 16 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 24, 2003, 6:49 PM CDT for Chicot County, Arkansas; 8 parishes in Louisiana; 16 counties in Mississippi. It was in force for 56 min.

The area

The outline as issued.

The facts

Issued
Apr 24, 2003, 6:49 PM CDT (23:49 UTC)
Expired
Apr 24, 2003, 7:45 PM CDT
In force
56 min
Issued by
the Storm Prediction Center
All 25 counties

Chicot County, AR, Catahoula Parish, LA, Concordia Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Carroll County, MS, Claiborne County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Leflore County, MS, Madison County, MS, Rankin County, MS, Sharkey County, MS, Sunflower County, MS, Tallahatchie County, MS, Warren County, MS, Washington County, MS, Yazoo County, MS

The watches that followed

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

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 11.8 hours before the alert went out and 108 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, Jackson, MS at 12:00Z on 2003-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 458 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, Jackson, MS at 12:00Z on 2003-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 297 square meters per square second.19395878Sfc1 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
458 J/kg
Mixed-layer CIN
-128 J/kg
Mixed-layer LCL
741 m above ground
0-6 km bulk shear
38 kt
0-1 km storm-relative helicity
297 m²/s²
0-3 km storm-relative helicity
439 m²/s²
Significant tornado parameter
0.0
Supercell composite
9.3

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 23, 11:43 PM CDTMesoscale DiscussionSPCHoward, Lafayette, Little River, Miller, Polk, Sevier2 hr
Apr 24, 2:41 AM CDTMesoscale DiscussionSPCColumbia, Lafayette, Miller, Nevada, Ouachita2 hr
Apr 24, 10:12 AM CDTMesoscale DiscussionSPCArkansas, Cleburne, Conway, Craighead, Crittenden, Cross and 20 more2 hr
Apr 24, 12:47 PM CDTMesoscale DiscussionSPCArkansas, Bradley, Calhoun, Clark, Cleburne, Cleveland and 38 more3 hr
Apr 24, 1:00 PM CDTTornado WatchSPCArkansas, Bradley, Calhoun, Clark, Cleveland, Columbia and 25 more7 hr
Apr 24, 2:05 PM CDTTornado WatchSPCAshley, Chicot6 hr
Apr 24, 2:46 PM CDTMesoscale DiscussionSPCChicot119 min
Apr 24, 3:25 PM CDTTornado WatchSPCBaxter, Boone, Cleburne, Conway, Faulkner, Fulton and 19 more5 hr
Apr 24, 3:28 PM CDTMesoscale DiscussionSPCArkansas, Clark, Cleburne, Cleveland, Conway, Craighead and 32 more2 hr
Apr 24, 5:52 PM CDTMesoscale DiscussionSPCArkansas, Baxter, Boone, Clay, Cleburne, Cleveland and 36 more113 min
Apr 24, 6:35 PM CDTTornado WatchSPCArkansas, Baxter, Clay, Cleburne, Cleveland, Conway and 33 more5 hr
Apr 24, 6:30 AM CDTSevere Thunderstorm WatchSPCAvoyelles, Beauregard, Bienville, Caldwell, Catahoula, Concordia and 17 more5 hr
Apr 24, 6:40 AM CDTSevere Thunderstorm WatchSPCAvoyelles, Beauregard, Bienville, Caldwell, Catahoula, Concordia and 17 more4 hr
Apr 24, 9:39 AM CDTMesoscale DiscussionSPCCaldwell, Catahoula, Concordia, Grant, LaSalle, Tensas and 1 more2 hr
Apr 24, 11:40 AM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Catahoula, Concordia and 10 more65 min
Apr 24, 5:17 PM CDTMesoscale DiscussionSPCOrleans, Saint Tammany, Washington118 min

Nearby

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