Alert archive / Louisiana / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 154

April 24, 200323 parishes in Louisiana; 8 counties in Mississippi; 8 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Apr 24, 2003, 6:40 AM CDT for 23 parishes in Louisiana; 8 counties in Mississippi; 8 counties in Texas. It was in force for 4 hr.

The area

The outline as issued.

The facts

Issued
Apr 24, 2003, 6:40 AM CDT (11:40 UTC)
Expired
Apr 24, 2003, 11:00 AM CDT
In force
4 hr
Issued by
the Storm Prediction Center
All 39 counties

Avoyelles Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, De Soto Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Madison Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Richland Parish, LA, Sabine Parish, LA, Tensas Parish, LA, Vernon Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Claiborne County, MS, Franklin County, MS, Issaquena County, MS, Jefferson County, MS, Sharkey County, MS, Warren County, MS, Wilkinson County, MS, Angelina County, TX, Hardin County, TX, Jasper County, TX, Newton County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Tyler County, TX

Warnings issued inside it

4 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Apr 24, 6:56 AM CDTSevere Thunderstorm WarningSHVSabine64 min
Apr 24, 8:28 AM CDTSevere Thunderstorm WarningSHVGrant17 min
Apr 24, 8:41 AM CDTSevere Thunderstorm WarningSHVLaSalle34 min
Apr 24, 9:44 AM CDTSevere Thunderstorm WarningJANConcordia41 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 11.7 hours before the alert went out and 113 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 00:00Z on 2003-04-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 35 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 00:00Z on 2003-04-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 176 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
35 J/kg
Mixed-layer CIN
-289 J/kg
Mixed-layer LCL
1142 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
176 m²/s²
0-3 km storm-relative helicity
230 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.2

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 23, 11:43 PM CDTMesoscale DiscussionSPCBossier, Caddo, De Soto2 hr
Apr 24, 2:41 AM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Claiborne, De Soto, Webster2 hr
Apr 24, 6:30 AM CDTSevere Thunderstorm WatchSPCAvoyelles, Beauregard, Bienville, Caldwell, Catahoula, Concordia and 17 more5 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, 1:00 PM CDTTornado WatchSPCBossier, Caddo, Claiborne, Webster7 hr
Apr 24, 2:05 PM CDTTornado WatchSPCBienville, Caldwell, Catahoula, Concordia, East Carroll, Franklin and 14 more6 hr
Apr 24, 2:46 PM CDTMesoscale DiscussionSPCEast Carroll, Madison, Tensas, West Carroll119 min
Apr 24, 5:17 PM CDTMesoscale DiscussionSPCOrleans, Saint Tammany, Washington118 min
Apr 24, 6:49 PM CDTMesoscale DiscussionSPCCatahoula, Concordia, East Carroll, Franklin, Madison, Richland and 2 more56 min
Apr 24, 5:52 PM CDTMesoscale DiscussionSPCCoahoma, DeSoto, Quitman, Tate, Tunica113 min
Apr 24, 6:35 PM CDTTornado WatchSPCBolivar, Coahoma, DeSoto, Panola, Quitman, Tallahatchie and 1 more5 hr
Apr 23, 7:00 PM CDTMesoscale DiscussionSPCCrockett, Edwards, Kimble, Kinney, Mason, Menard and 5 more90 min
Apr 23, 7:03 PM CDTMesoscale DiscussionSPCBosque, Collin, Comanche, Cooke, Coryell, Dallas and 25 more117 min
Apr 23, 7:45 PM CDTTornado WatchSPCBandera, Bexar, Blanco, Burnet, Caldwell, Comal and 11 more4 hr
Apr 23, 8:43 PM CDTMesoscale DiscussionSPCArcher, Baylor, Brown, Callahan, Clay, Coleman and 15 more77 min
Apr 23, 9:35 PM CDTSevere Thunderstorm WatchSPCCollin, Cooke, Dallas, Delta, Denton, Ellis and 20 more5 hr
Apr 24, 7:14 AM CDTMesoscale DiscussionSPCAustin, Bastrop, Brazoria, Brazos, Burleson, Caldwell and 22 more2 hr
Apr 24, 7:30 AM CDTTornado WatchSPCAngelina, Austin, Brazoria, Brazos, Burleson, Chambers and 17 more6 hr
Apr 24, 9:11 AM CDTMesoscale DiscussionSPCFort Bend, Harris, Liberty, Montgomery, Polk, San Jacinto2 hr

Nearby

Severe Thunderstorm Watches in Louisiana, 2003Severe Thunderstorm Watches in Mississippi, 2003Severe Thunderstorm Watches in Texas, 2003Every severe thunderstorm watch 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.