Alert archive / Texas / Mesoscale Discussions in 2003

Mesoscale Discussion 1346

June 12, 2003Bossier Parish, Caddo Parish, De Soto Parish, Louisiana; 40 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jun 12, 2003, 12:30 AM CDT for Bossier Parish, Caddo Parish, De Soto Parish, Louisiana; 40 counties in Texas. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued
Jun 12, 2003, 12:30 AM CDT (05:30 UTC)
Expired
Jun 12, 2003, 2:30 AM CDT
In force
2 hr
Issued by
the Storm Prediction Center
All 43 counties

Bossier Parish, LA, Caddo Parish, LA, De Soto Parish, LA, Anderson County, TX, Angelina County, TX, Austin County, TX, Brazos County, TX, Burleson County, TX, Camp County, TX, Cass County, TX, Cherokee County, TX, Colorado County, TX, Fort Bend County, TX, Franklin County, TX, Freestone County, TX, Gregg County, TX, Grimes County, TX, Harris County, TX, Harrison County, TX, Houston County, TX, Leon County, TX, Liberty County, TX, Madison County, TX, Marion County, TX, Montgomery County, TX, Morris County, TX, Nacogdoches County, TX, Panola County, TX, Polk County, TX, Robertson County, TX, Rusk County, TX, San Augustine County, TX, San Jacinto County, TX, Shelby County, TX, Smith County, TX, Titus County, TX, Trinity County, TX, Tyler County, TX, Upshur County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wood County, TX

The radar

The Houston radar (KHGX), 182 km from the middle of the area, began a volume at 05:30 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.

The watches that followed

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

The nearest sounding before it

Shreveport, LA (KSHV), launched 00:00Z, 5.5 hours before the alert went out and 210 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 2003-06-12Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3228 joules per kilogram.LCLEL10008507005003002001001 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 2003-06-12The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.193958Sfc1 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
3228 J/kg
Mixed-layer CIN
-3 J/kg
Mixed-layer LCL
1675 m above ground
0-6 km bulk shear
22 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
153 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.5

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
Jun 11, 7:50 PM CDTSevere Thunderstorm WatchSPCEast Carroll, Morehouse, West Carroll5 hr
Jun 11, 9:18 PM CDTMesoscale DiscussionSPCEast Carroll, West Carroll87 min
Jun 12, 1:10 AM CDTSevere Thunderstorm WatchSPCBossier, Caddo, De Soto4 hr
Jun 12, 4:20 AM CDTMesoscale DiscussionSPCBossier, Caddo, De Soto55 min
Jun 12, 8:51 AM CDTMesoscale DiscussionSPCConcordia, East Baton Rouge, East Feliciana, Livingston, Pointe Coupee, Saint Helena and 5 more84 min
Jun 12, 9:10 AM CDTSevere Thunderstorm WatchSPCAscension, Assumption, East Baton Rouge, East Feliciana, Livingston, Orleans and 6 more5 hr
Jun 12, 11:10 AM CDTMesoscale DiscussionSPCLivingston, Orleans, Saint James, Saint John the Baptist, Saint Tammany, Tangipahoa and 1 more95 min
Jun 12, 1:15 PM CDTMesoscale DiscussionSPCOrleans, Saint Tammany60 min
Jun 12, 4:40 PM CDTSevere Thunderstorm WatchSPCEast Baton Rouge, East Feliciana, Livingston, Saint Helena, Saint Tammany, Tangipahoa and 2 more4 hr
Jun 11, 7:13 PM CDTMesoscale DiscussionSPCBorden, Callahan, Coke, Coleman, Concho, Crockett and 29 more62 min
Jun 11, 8:04 PM CDTMesoscale DiscussionSPCBell, Blanco, Bosque, Brown, Burnet, Caldwell and 27 more86 min
Jun 11, 8:15 PM CDTTornado WatchSPCArcher, Baylor, Brown, Callahan, Clay, Coleman and 29 more6 hr
Jun 11, 9:15 PM CDTSevere Thunderstorm WatchSPCBell, Bosque, Collin, Coryell, Dallas, Denton and 19 more5 hr
Jun 11, 11:10 PM CDTMesoscale DiscussionSPCArcher, Baylor, Brown, Callahan, Clay, Coleman and 29 more65 min
Jun 11, 11:49 PM CDTMesoscale DiscussionSPCBell, Bosque, Collin, Coryell, Dallas, Denton and 20 more86 min
Jun 12, 12:14 AM CDTMesoscale DiscussionSPCBowie, Camp, Cass, Franklin, Marion, Morris and 3 more2 hr
Jun 12, 1:30 AM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Cooke, Denton, Foard and 16 more2 hr
Jun 12, 1:31 PM CDTMesoscale DiscussionSPCBrazos, Burleson, Grimes, Jasper, Montgomery, Newton and 5 more119 min
Jun 12, 1:56 PM CDTMesoscale DiscussionSPCBrown, Callahan, Coleman, Comanche, Concho, Eastland and 11 more2 hr
Jun 12, 3:30 PM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Bosque, Brown, Callahan, Childress and 29 more6 hr
Jun 12, 5:59 PM CDTMesoscale DiscussionSPCArmstrong, Carson, Dallam, Deaf Smith, Donley, Gray and 11 more91 min

Nearby

Mesoscale Discussions in Texas, 2003Mesoscale Discussions in Louisiana, 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; radar from the NEXRAD Level II archive.