Alert archive / Louisiana / Mesoscale Discussions in 2005

Mesoscale Discussion 1594

July 2, 200519 parishes in Louisiana; 10 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at Jul 2, 2005, 12:58 PM CDT for 19 parishes in Louisiana; 10 counties in Texas. It was in force for 92 min.

The area

The outline as issued.

The facts

Issued
Jul 2, 2005, 12:58 PM CDT (17:58 UTC)
Expired
Jul 2, 2005, 2:30 PM CDT
In force
92 min
Issued by
the Storm Prediction Center
All 29 counties

Acadia Parish, LA, Allen Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Bienville Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, De Soto Parish, LA, Evangeline Parish, LA, Grant Parish, LA, Jackson Parish, LA, LaSalle Parish, LA, Natchitoches Parish, LA, Rapides Parish, LA, Red River Parish, LA, Sabine Parish, LA, Saint Landry Parish, LA, Vernon Parish, LA, Winn Parish, LA, Angelina County, TX, Jasper County, TX, Nacogdoches County, TX, Newton County, TX, Panola County, TX, Rusk County, TX, Sabine County, TX, San Augustine County, TX, Shelby 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

Shreveport, LA (KSHV), launched 12:00Z, 6.0 hours before the alert went out and 122 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 2005-07-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 168 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 12:00Z on 2005-07-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 58 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
168 J/kg
Mixed-layer CIN
-254 J/kg
Mixed-layer LCL
1203 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
58 m²/s²
0-3 km storm-relative helicity
82 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

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
Jul 2, 10:06 AM CDTMesoscale DiscussionSPCBienville, Caddo, Caldwell, De Soto, Grant, Jackson and 7 more114 min
Jul 2, 11:40 AM CDTSevere Thunderstorm WatchSPCAllen, Beauregard, Caldwell, De Soto, Evangeline, Grant and 7 more6 hr
Jul 2, 2:33 PM CDTMesoscale DiscussionSPCAcadia, Allen, Ascension, Avoyelles, Beauregard, Caldwell and 26 more87 min
Jul 2, 3:00 PM CDTSevere Thunderstorm WatchSPCAscension, Avoyelles, Catahoula, Concordia, East Baton Rouge, East Feliciana and 14 more6 hr
Jul 2, 4:44 PM CDTMesoscale DiscussionSPCAllen, Ascension, Avoyelles, Caldwell, Catahoula, Concordia and 20 more91 min
Jul 2, 6:54 PM CDTMesoscale DiscussionSPCAscension, Livingston, Orleans, Saint Bernard, Saint Charles, Saint Helena and 5 more96 min
Jul 1, 7:15 PM CDTSevere Thunderstorm WatchSPCCarson, Dallam, Gray, Hansford, Hartley, Hemphill and 7 more7 hr
Jul 1, 7:25 PM CDTSevere Thunderstorm WatchSPCBorden, Callahan, Coke, Coleman, Concho, Crosby and 33 more6 hr
Jul 1, 8:51 PM CDTMesoscale DiscussionSPCAndrews, Bailey, Castro, Cochran, Ector, Gaines and 7 more84 min
Jul 1, 10:23 PM CDTMesoscale DiscussionSPCBorden, Callahan, Coke, Coleman, Concho, Crosby and 34 more97 min
Jul 1, 10:29 PM CDTMesoscale DiscussionSPCCarson, Dallam, Gray, Hansford, Hartley, Hemphill and 7 more91 min
Jul 2, 1:32 AM CDTMesoscale DiscussionSPCArcher, Armstrong, Baylor, Bosque, Briscoe, Brown and 60 more28 min
Jul 2, 4:47 AM CDTMesoscale DiscussionSPCBailey, Borden, Briscoe, Castro, Cochran, Crosby and 16 more88 min

Nearby

Mesoscale Discussions in Louisiana, 2005Mesoscale Discussions in Texas, 2005Every mesoscale discussion in 2005

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.