Alert archive / Louisiana / Tornado Watches in 2006

Tornado Watch 167

April 7, 2006Columbia County, Lafayette County, Union County, Arkansas; 24 parishes in Louisiana; 12 counties in Texas

The Storm Prediction Center issued this tornado watch at Apr 7, 2006, 5:37 PM CDT for Columbia County, Lafayette County, Union County, Arkansas; 24 parishes in Louisiana; 12 counties in Texas. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Apr 7, 2006, 5:37 PM CDT (22:37 UTC)
Expired
Apr 8, 2006, 1:00 AM CDT
In force
7 hr
Issued by
the Storm Prediction Center
All 39 counties

Columbia County, AR, Lafayette 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, Claiborne Parish, LA, De Soto Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Lincoln Parish, LA, Natchitoches Parish, LA, Ouachita Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Saint Landry Parish, LA, Union Parish, LA, Vernon Parish, LA, Webster Parish, LA, Winn Parish, LA, Angelina County, TX, Hardin County, TX, Harrison County, TX, Jasper County, TX, Marion County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Tyler County, TX

The radar

The Shreveport radar (KSHV), 97 km from the middle of the area, began a volume at 22:38 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Apr 7, 5:40 PM CDTSevere Thunderstorm WarningSHVJackson65 min
Apr 7, 6:02 PM CDTSevere Thunderstorm WarningSHVWebster43 min
Apr 7, 6:21 PM CDTSevere Thunderstorm WarningSHVClaiborne39 min
Apr 7, 6:41 PM CDTSevere Thunderstorm WarningSHVUnion79 min
Apr 7, 7:12 PM CDTSevere Thunderstorm WarningSHVWebster48 min
Apr 7, 7:15 PM CDTSevere Thunderstorm WarningSHVBossier, Caddo60 min
Apr 7, 7:17 PM CDTSevere Thunderstorm WarningSHVClaiborne58 min
Apr 7, 7:53 PM CDTSevere Thunderstorm WarningSHVWebster37 min
Apr 7, 8:08 PM CDTSevere Thunderstorm WarningSHVClaiborne67 min
Apr 7, 8:37 PM CDTSevere Thunderstorm WarningSHVUnion53 min
Apr 7, 8:54 PM CDTSevere Thunderstorm WarningSHVLincoln66 min
Apr 7, 9:27 PM CDTSevere Thunderstorm WarningSHVUnion63 min
Apr 7, 10:21 PM CDTSevere Thunderstorm WarningSHVOuachita54 min
Apr 7, 10:47 PM CDTSevere Thunderstorm WarningSHVBienville43 min
Apr 7, 11:34 PM CDTSevere Thunderstorm WarningSHVOuachita56 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

Jackson, MS (KJAN), launched 12:00Z, 10.6 hours before the alert went out and 264 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 2006-04-07Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 883 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 2006-04-07The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 282 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
883 J/kg
Mixed-layer CIN
-113 J/kg
Mixed-layer LCL
651 m above ground
0-6 km bulk shear
49 kt
0-1 km storm-relative helicity
282 m²/s²
0-3 km storm-relative helicity
315 m²/s²
Significant tornado parameter
0.7
Supercell composite
3.6

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 6, 7:53 PM CDTMesoscale DiscussionSPCBenton, Crawford, Polk, Scott, Sebastian, Washington97 min
Apr 6, 10:21 PM CDTMesoscale DiscussionSPCBaxter, Benton, Boone, Carroll, Cleburne, Conway and 24 more84 min
Apr 6, 11:33 PM CDTTornado WatchSPCClay, Cleburne, Craighead, Cross, Faulkner, Fulton and 12 more3 hr
Apr 7, 9:07 AM CDTMesoscale DiscussionSPCClay, Craighead, Crittenden, Cross, Greene, Lee and 5 more113 min
Apr 7, 10:20 AM CDTTornado WatchSPCClay, Craighead, Crittenden, Cross, Greene, Lawrence and 4 more10 hr
Apr 7, 10:47 AM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Chicot, Desha, Drew and 4 more118 min
Apr 7, 11:34 AM CDTTornado WatchSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 10 more8 hr
Apr 7, 2:22 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Chicot, Clay, Craighead, Crittenden and 12 more113 min
Apr 7, 4:53 PM CDTMesoscale DiscussionSPCColumbia, Lafayette67 min
Apr 7, 5:12 PM CDTMesoscale DiscussionSPCArkansas, Ashley, Bradley, Calhoun, Chicot, Cleveland and 10 more93 min
Apr 6, 7:07 PM CDTMesoscale DiscussionSPCAnderson, Bell, Bosque, Brazos, Burleson, Burnet and 38 more83 min
Apr 6, 9:27 PM CDTMesoscale DiscussionSPCAnderson, Bell, Brazos, Burleson, Camp, Cherokee and 34 more63 min

Nearby

Tornado Watches in Louisiana, 2006Tornado Watches in Texas, 2006Tornado Watches in Arkansas, 2006Every tornado watch in 2006

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; radar from the NEXRAD Level II archive.