Alert archive / Mississippi / Mesoscale Discussions in 2003

Mesoscale Discussion 684

May 2, 20034 states

The Storm Prediction Center issued this mesoscale discussion at May 2, 2003, 2:21 PM CDT for 4 states. It was in force for 114 min.

The area

The outline as issued.

The facts

Issued
May 2, 2003, 2:21 PM CDT (19:21 UTC)
Expired
May 2, 2003, 4:15 PM CDT
In force
114 min
Issued by
the Storm Prediction Center
All 99 counties

Ashley County, AR, Bradley County, AR, Chicot County, AR, Columbia County, AR, Desha County, AR, Drew County, AR, Union County, AR, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Bossier Parish, LA, Caddo Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Amite County, MS, Attala County, MS, Bolivar County, MS, Carroll County, MS, Choctaw County, MS, Claiborne County, MS, Clarke County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lawrence County, MS, Leake County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Montgomery County, MS, Neshoba County, MS, Newton 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, Wilkinson County, MS, Winston County, MS, Yazoo County, MS, Anderson County, TX, Angelina County, TX, Cherokee County, TX, Gregg County, TX, Hardin County, TX, Harrison County, TX, Houston County, TX, Jasper County, TX, Marion County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Polk County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Smith County, TX, Trinity County, TX, Tyler 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

Jackson, MS (KJAN), launched 12:00Z, 7.4 hours before the alert went out and 208 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 2003-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2608 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 2003-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 21 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
2608 J/kg
Mixed-layer CIN
-88 J/kg
Mixed-layer LCL
800 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
21 m²/s²
0-3 km storm-relative helicity
29 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.6

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
May 1, 8:54 PM CDTMesoscale DiscussionSPCBenton, Carroll, Crawford, Franklin, Hempstead, Howard and 10 more96 min
May 1, 9:00 PM CDTSevere Thunderstorm WatchSPCClark, Columbia, Garland, Hempstead, Hot Spring, Howard and 10 more4 hr
May 1, 11:53 PM CDTMesoscale DiscussionSPCClark, Columbia, Garland, Hempstead, Hot Spring, Howard and 10 more67 min
May 2, 1:27 AM CDTMesoscale DiscussionSPCBaxter, Boone, Carroll, Clay, Craighead, Fulton and 8 more2 hr
May 2, 2:55 PM CDTSevere Thunderstorm WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 13 more6 hr
May 2, 6:31 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 11 more119 min
May 2, 1:43 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Calhoun, Chickasaw, Clay, DeSoto and 20 more92 min
May 2, 1:55 PM CDTSevere Thunderstorm WatchSPCAlcorn, Calhoun, Chickasaw, Choctaw, Clay, Itawamba and 10 more5 hr
May 2, 3:25 PM CDTSevere Thunderstorm WatchSPCNoxubee4 hr
May 2, 5:36 PM CDTMesoscale DiscussionSPCAlcorn, Calhoun, Chickasaw, Choctaw, Clay, Itawamba and 10 more84 min
May 1, 7:25 PM CDTSevere Thunderstorm WatchSPCBell, Blanco, Bosque, Brown, Burnet, Comanche and 29 more5 hr
May 1, 10:10 PM CDTMesoscale DiscussionSPCAnderson, Bell, Blanco, Bosque, Brown, Burnet and 30 more95 min
May 1, 11:19 PM CDTMesoscale DiscussionSPCAustin, Brazoria, Brazos, Burleson, Colorado, Fort Bend and 14 more86 min
May 1, 11:20 PM CDTSevere Thunderstorm WatchSPCAustin, Brazoria, Chambers, Fort Bend, Galveston, Harris and 4 more4 hr
May 2, 2:25 PM CDTMesoscale DiscussionSPCBosque, Brown, Callahan, Coke, Coleman, Comanche and 21 more2 hr
May 2, 2:45 PM CDTTornado WatchSPCBrown, Callahan, Coke, Coleman, Concho, Crockett and 20 more6 hr
May 2, 4:28 PM CDTMesoscale DiscussionSPCAnderson, Bell, Bosque, Cherokee, Coryell, Dallas and 30 more2 hr
May 2, 4:45 PM CDTSevere Thunderstorm WatchSPCAnderson, Bell, Bosque, Brown, Burnet, Cass and 32 more5 hr
May 2, 5:57 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coke, Coleman, Comanche, Concho and 12 more2 hr

Nearby

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