Alert archive / Louisiana / Mesoscale Discussions in 2007

Mesoscale Discussion 990

June 3, 20074 states

The Storm Prediction Center issued this mesoscale discussion at Jun 3, 2007, 5:48 PM CDT for 4 states. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued
Jun 3, 2007, 5:48 PM CDT (22:48 UTC)
Expired
Jun 3, 2007, 7:15 PM CDT
In force
87 min
Issued by
the Storm Prediction Center
All 96 counties

Ashley County, AR, Bradley County, AR, Calhoun County, AR, Chicot County, AR, Cleveland County, AR, Columbia County, AR, Desha County, AR, Drew County, AR, Lincoln County, AR, Ouachita County, AR, Phillips County, AR, Union County, AR, Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Beauregard Parish, LA, Calcasieu Parish, LA, Cameron Parish, LA, Catahoula Parish, LA, Claiborne Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Carroll Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Franklin Parish, LA, Grant Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, LaSalle Parish, LA, Livingston Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Orleans Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Richland Parish, LA, Sabine Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Landry Parish, LA, Saint Martin Parish, LA, Saint Tammany Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, Terrebonne Parish, LA, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Bolivar County, MS, Claiborne County, MS, Coahoma County, MS, Copiah County, MS, Covington County, MS, Franklin County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lamar County, MS, Lawrence County, MS, Leflore County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Pearl River County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Walthall County, MS, Warren County, MS, Washington County, MS, Wilkinson County, MS, Yazoo County, MS, Jefferson County, TX, Orange County, TX, Sabine County, TX, San Augustine County, TX

The nearest sounding before it

Lake Charles Mun, LA (KLCH), launched 12:00Z, 10.8 hours before the alert went out and 163 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, Lake Charles Mun, LA at 12:00Z on 2007-06-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1497 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, Lake Charles Mun, LA at 12:00Z on 2007-06-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 68 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
1497 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
623 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
68 m²/s²
0-3 km storm-relative helicity
52 m²/s²
Significant tornado parameter
0.5
Supercell composite
3.6

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 3, 11:47 AM CDTMesoscale DiscussionSPCAllen, Beauregard, Calcasieu, De Soto, Grant, Jefferson Davis and 4 more58 min
Jun 3, 12:22 PM CDTSevere Thunderstorm WatchSPCAcadia, Allen, Avoyelles, Beauregard, Bossier, Caddo and 19 more6 hr
Jun 3, 3:13 PM CDTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Calcasieu and 32 more62 min
Jun 3, 3:35 PM CDTSevere Thunderstorm WatchSPCAscension, Assumption, Catahoula, Concordia, East Baton Rouge, East Feliciana and 11 more3 hr
Jun 2, 7:28 PM CDTMesoscale DiscussionSPCArmstrong, Bailey, Briscoe, Carson, Castro, Childress and 29 more62 min
Jun 2, 9:45 PM CDTMesoscale DiscussionSPCBailey, Castro, Crosby, Garza, Hale, Hockley and 5 more60 min
Jun 2, 10:36 PM CDTTornado WatchSPCAndrews, Bailey, Borden, Castro, Cochran, Crosby and 16 more4 hr
Jun 3, 1:17 AM CDTMesoscale DiscussionSPCAndrews, Bailey, Borden, Castro, Cochran, Coke and 32 more58 min
Jun 3, 2:23 AM CDTMesoscale DiscussionSPCArcher, Armstrong, Baylor, Childress, Clay, Collingsworth and 11 more67 min
Jun 3, 2:58 AM CDTSevere Thunderstorm WatchSPCArcher, Baylor, Clay, Foard, Hardeman, Knox and 2 more5 hr
Jun 3, 3:01 AM CDTMesoscale DiscussionSPCCoke, Crane, Crockett, Ector, Glasscock, Irion and 7 more89 min
Jun 3, 3:38 AM CDTMesoscale DiscussionSPCBorden, Crosby, Dawson, Dickens, Gaines, Garza and 6 more67 min
Jun 3, 5:32 AM CDTMesoscale DiscussionSPCArcher, Baylor, Clay, Wichita58 min
Jun 3, 7:04 AM CDTMesoscale DiscussionSPCClay, Collin, Cooke, Dallas, Delta, Denton and 19 more56 min
Jun 3, 8:37 AM CDTSevere Thunderstorm WatchSPCAnderson, Angelina, Bosque, Cherokee, Ellis, Falls and 31 more5 hr
Jun 3, 12:42 PM CDTMesoscale DiscussionSPCAndrews, Crane, Culberson, Ector, Gaines, Glasscock and 9 more93 min
Jun 3, 1:28 PM CDTTornado WatchSPCAndrews, Brewster, Crane, Culberson, Ector, Gaines and 14 more9 hr
Jun 3, 1:42 PM CDTMesoscale DiscussionSPCDallam, Deaf Smith, Hartley, Oldham93 min
Jun 3, 2:43 PM CDTSevere Thunderstorm WatchSPCDallam, Deaf Smith, Hartley, Moore, Oldham, Potter and 2 more7 hr
Jun 3, 3:29 PM CDTMesoscale DiscussionSPCBrown, Coke, Coleman, Concho, Irion, McCulloch and 10 more31 min
Jun 3, 3:44 PM CDTSevere Thunderstorm WatchSPCBrown, Coke, Coleman, Concho, Crockett, Irion and 10 more6 hr
Jun 3, 3:55 PM CDTMesoscale DiscussionSPCBell, Brazos, Coryell, Falls, Grimes, Lampasas and 10 more95 min
Jun 3, 3:59 PM CDTMesoscale DiscussionSPCBailey, Borden, Cochran, Crosby, Dickens, Floyd and 12 more91 min
Jun 3, 5:09 PM CDTMesoscale DiscussionSPCAndrews, Brewster, Crane, Culberson, Ector, Gaines and 14 more66 min
Jun 3, 5:45 PM CDTSevere Thunderstorm WatchSPCAustin, Bastrop, Bell, Blanco, Brazoria, Brazos and 37 more7 hr
Jun 3, 5:51 PM CDTMesoscale DiscussionSPCBrown, Coke, Coleman, Concho, Crockett, Irion and 10 more54 min
Jun 3, 6:47 PM CDTMesoscale DiscussionSPCBailey, Castro, Cochran, Dallam, Deaf Smith, Hale and 10 more58 min

Nearby

Mesoscale Discussions in Louisiana, 2007Mesoscale Discussions in Mississippi, 2007Mesoscale Discussions in Arkansas, 2007Every mesoscale discussion in 2007

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.