Alert archive / Louisiana / Severe Thunderstorm Watches in 2003

Severe Thunderstorm Watch 737

July 13, 200325 parishes in Louisiana; Adams County, Mississippi; 19 counties in Texas

The Storm Prediction Center issued this severe thunderstorm watch at Jul 13, 2003, 1:55 PM CDT for 25 parishes in Louisiana; Adams County, Mississippi; 19 counties in Texas. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Jul 13, 2003, 1:55 PM CDT (18:55 UTC)
Expired
Jul 13, 2003, 7:00 PM CDT
In force
5 hr
Issued by
the Storm Prediction Center
All 45 counties

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, 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, Red River Parish, LA, Richland Parish, LA, Tensas Parish, LA, Union Parish, LA, Webster Parish, LA, West Carroll Parish, LA, Winn Parish, LA, Adams County, MS, Camp County, TX, Cass County, TX, Delta County, TX, Franklin County, TX, Gregg County, TX, Harrison County, TX, Henderson County, TX, Hopkins County, TX, Marion County, TX, Morris County, TX, Panola County, TX, Rains County, TX, Rusk County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Upshur County, TX, Van Zandt County, TX, Wood County, TX

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Jul 13, 2:35 PM CDTSevere Thunderstorm WarningJANMorehouse55 min
Jul 13, 2:53 PM CDTSevere Thunderstorm WarningSHVCamp, Franklin37 min
Jul 13, 2:56 PM CDTSevere Thunderstorm WarningFWDHopkins34 min
Jul 13, 4:48 PM CDTSevere Thunderstorm WarningSHVRusk42 min
Jul 13, 5:29 PM CDTSevere Thunderstorm WarningSHVShelby31 min
Jul 13, 5:30 PM CDTSevere Thunderstorm WarningSHVShelby30 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 12:00Z, 6.9 hours before the alert went out and 26 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 2003-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1819 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 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 2003-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -6 square meters per square second.1939Sfc1 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
1819 J/kg
Mixed-layer CIN
-90 J/kg
Mixed-layer LCL
991 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
-6 m²/s²
0-3 km storm-relative helicity
55 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 13, 11:02 AM CDTMesoscale DiscussionSPCCatahoula, Concordia, East Carroll, Franklin, LaSalle, Madison and 4 more118 min
Jul 13, 1:41 PM CDTMesoscale DiscussionSPCBienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 10 more2 hr
Jul 13, 4:33 PM CDTMesoscale DiscussionSPCBienville, Caldwell, Catahoula, Concordia, De Soto, Franklin and 10 more87 min
Jul 13, 11:30 AM CDTMesoscale DiscussionSPCAlcorn, Benton, Bolivar, Coahoma, DeSoto, Lafayette and 12 more2 hr
Jul 13, 11:55 AM CDTSevere Thunderstorm WatchSPCAlcorn, Benton, Bolivar, Calhoun, Carroll, Chickasaw and 25 more6 hr
Jul 13, 3:05 PM CDTSevere Thunderstorm WatchSPCLowndes5 hr
Jul 13, 3:53 PM CDTMesoscale DiscussionSPCAlcorn, Benton, Bolivar, Calhoun, Carroll, Chickasaw and 24 more67 min
Jul 13, 5:55 PM CDTSevere Thunderstorm WatchSPCAlcorn, Attala, Benton, Bolivar, Calhoun, Carroll and 33 more4 hr

Nearby

Severe Thunderstorm Watches in Louisiana, 2003Severe Thunderstorm Watches in Texas, 2003Severe Thunderstorm Watches in Mississippi, 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.