Alert archive / Louisiana / Mesoscale Discussions in 2006

Mesoscale Discussion 829

May 10, 20068 parishes in Louisiana; 7 counties in Texas

The Storm Prediction Center issued this mesoscale discussion at May 10, 2006, 12:50 PM CDT for 8 parishes in Louisiana; 7 counties in Texas. It was in force for 115 min.

The area

The outline as issued.

The facts

Issued
May 10, 2006, 12:50 PM CDT (17:50 UTC)
Expired
May 10, 2006, 2:45 PM CDT
In force
115 min
Issued by
the Storm Prediction Center

Counties Bienville Parish, LA, De Soto Parish, LA, Grant Parish, LA, Jackson Parish, LA, Natchitoches Parish, LA, Red River Parish, LA, Sabine Parish, LA, Winn Parish, LA, Angelina County, TX, Nacogdoches County, TX, Panola County, TX, Sabine County, TX, San Augustine County, TX, Shelby County, TX, Trinity 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, 5.8 hours before the alert went out and 88 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 2006-05-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2609 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 2006-05-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 258 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
2609 J/kg
Mixed-layer CIN
-194 J/kg
Mixed-layer LCL
528 m above ground
0-6 km bulk shear
44 kt
0-1 km storm-relative helicity
258 m²/s²
0-3 km storm-relative helicity
280 m²/s²
Significant tornado parameter
0.2
Supercell composite
4.9

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
May 10, 10:57 AM CDTMesoscale DiscussionSPCCaldwell, Catahoula, Claiborne, East Carroll, Franklin, Jackson and 9 more2 hr
May 10, 12:03 PM CDTTornado WatchSPCCatahoula, Concordia, East Carroll, Franklin, Madison, Morehouse and 3 more9 hr
May 10, 1:13 PM CDTTornado WatchSPCAllen, Avoyelles, Beauregard, Bienville, Bossier, Caddo and 17 more8 hr
May 10, 2:42 PM CDTMesoscale DiscussionSPCCaldwell, Catahoula, East Carroll, Franklin, Jackson, LaSalle and 6 more2 hr
May 10, 6:05 PM CDTMesoscale DiscussionSPCAcadia, Ascension, Assumption, Cameron, East Baton Rouge, East Feliciana and 20 more85 min
May 9, 8:06 PM CDTMesoscale DiscussionSPCChildress, Collingsworth, Donley, Gray, Hall, Hardeman and 2 more84 min
May 9, 9:18 PM CDTTornado WatchSPCBowie, Red River6 hr
May 9, 9:38 PM CDTMesoscale DiscussionSPCArcher, Clay, Cooke, Fannin, Grayson, Hardeman and 5 more97 min
May 9, 10:46 PM CDTSevere Thunderstorm WatchSPCArcher, Clay, Collin, Cooke, Delta, Fannin and 6 more7 hr
May 10, 4:01 AM CDTMesoscale DiscussionSPCBowie, Collin, Cooke, Delta, Fannin, Franklin and 8 more89 min
May 10, 4:24 AM CDTSevere Thunderstorm WatchSPCBowie, Cass, Franklin, Morris, Red River, Titus8 hr
May 10, 6:27 AM CDTMesoscale DiscussionSPCBowie, Red River93 min
May 10, 2:34 PM CDTMesoscale DiscussionSPCAransas, Austin, Bee, Brazoria, Brooks, Calhoun and 26 more116 min
May 10, 2:59 PM CDTSevere Thunderstorm WatchSPCAustin, Brazoria, Chambers, Colorado, Fort Bend, Galveston and 11 more5 hr
May 10, 3:20 PM CDTSevere Thunderstorm WatchSPCAransas, Bee, Brooks, Calhoun, Cameron, DeWitt and 15 more7 hr
May 10, 5:04 PM CDTMesoscale DiscussionSPCBrazoria, Calhoun, Chambers, Colorado, Fort Bend, Galveston and 5 more116 min
May 10, 6:06 PM CDTMesoscale DiscussionSPCAransas, Brooks, Hidalgo, Jim Hogg, Jim Wells, Kenedy and 6 more114 min

Nearby

Mesoscale Discussions in Louisiana, 2006Mesoscale Discussions in Texas, 2006Every mesoscale discussion 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.