Alert archive / Louisiana / Mesoscale Discussions in 2008

Mesoscale Discussion 927

May 14, 200840 parishes in Louisiana; 14 counties in Mississippi; Orange County, Texas

The Storm Prediction Center issued this mesoscale discussion at May 14, 2008, 5:12 PM CDT for 40 parishes in Louisiana; 14 counties in Mississippi; Orange County, Texas. It was in force for 63 min.

The area

The outline as issued.

The facts

Issued: May 14, 2008, 5:12 PM CDT (22:12 UTC)
Expired: May 14, 2008, 6:15 PM CDT
In force: 63 min
Issued by: the Storm Prediction Center

All 55 counties

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, Concordia Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Jefferson Parish, LA, Lafayette Parish, LA, Lafourche Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Pointe Coupee Parish, LA, Rapides Parish, LA, Saint Bernard 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, Terrebonne Parish, LA, Vermilion Parish, LA, Vernon Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Franklin County, MS, Hancock County, MS, Jefferson County, MS, Jefferson Davis County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Pike County, MS, Walthall County, MS, Wilkinson County, MS, Orange County, TX

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.2 hours before the alert went out and 151 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 583 J/kg
Mixed-layer CIN: -90 J/kg
Mixed-layer LCL: 608 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 187 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.8

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.

Issued	Product	Office	Counties	Lasted
May 13, 7:11 PM CDT	Mesoscale Discussion	SPC	Acadia, Ascension, Assumption, Avoyelles, Bienville, Bossier and 45 more	2 hr
May 14, 2:28 AM CDT	Mesoscale Discussion	SPC	Bienville, Bossier, Caddo, Claiborne, De Soto, Natchitoches and 3 more	92 min
May 14, 7:31 AM CDT	Mesoscale Discussion	SPC	Beauregard, Bienville, De Soto, Grant, Jackson, LaSalle and 7 more	119 min
May 14, 7:50 AM CDT	Tornado Watch	SPC	Beauregard, Caldwell, De Soto, Grant, LaSalle, Natchitoches and 5 more	7 hr
May 14, 10:23 AM CDT	Mesoscale Discussion	SPC	Beauregard, Bienville, De Soto, Grant, Jackson, LaSalle and 7 more	97 min
May 14, 1:55 PM CDT	Mesoscale Discussion	SPC	Ascension, Avoyelles, Catahoula, Concordia, East Baton Rouge, East Feliciana and 10 more	65 min
May 14, 2:04 PM CDT	Tornado Watch	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 31 more	7 hr
May 13, 8:05 PM CDT	Mesoscale Discussion	SPC	Brown, Clay, Coleman, Comanche, Cooke, Denton and 10 more	85 min
May 13, 8:29 PM CDT	Mesoscale Discussion	SPC	Bandera, Blanco, Burnet, Comal, Concho, Edwards and 15 more	91 min
May 13, 8:53 PM CDT	Severe Thunderstorm Watch	SPC	Anderson, Bell, Bosque, Brown, Callahan, Coke and 56 more	7 hr
May 13, 9:54 PM CDT	Severe Thunderstorm Watch	SPC	Bastrop, Brazos, Burleson, Caldwell, Comal, Fayette and 5 more	6 hr
May 13, 11:41 PM CDT	Mesoscale Discussion	SPC	Bastrop, Bell, Blanco, Bosque, Brazos, Burleson and 18 more	94 min
May 14, 12:50 AM CDT	Mesoscale Discussion	SPC	Archer, Armstrong, Baylor, Briscoe, Childress, Clay and 26 more	85 min
May 14, 1:19 AM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Blanco, Comal, Dimmit and 19 more	56 min
May 14, 1:40 AM CDT	Tornado Watch	SPC	Atascosa, Bandera, Bexar, Comal, Dimmit, Edwards and 12 more	6 hr
May 14, 2:59 AM CDT	Mesoscale Discussion	SPC	Austin, Bastrop, Bell, Blanco, Brazos, Burleson and 26 more	91 min
May 14, 3:39 AM CDT	Severe Thunderstorm Watch	SPC	Austin, Bastrop, Bell, Blanco, Brazos, Burleson and 25 more	6 hr
May 14, 5:13 AM CDT	Mesoscale Discussion	SPC	Austin, Bastrop, Bell, Blanco, Brazos, Burleson and 29 more	92 min
May 14, 5:38 AM CDT	Mesoscale Discussion	SPC	Atascosa, Bandera, Bexar, Edwards, Frio, Kerr and 7 more	97 min
May 14, 6:42 AM CDT	Mesoscale Discussion	SPC	Austin, Bastrop, Bell, Blanco, Brazos, Burleson and 30 more	63 min
May 14, 12:12 PM CDT	Mesoscale Discussion	SPC	Andrews, Dawson, Gaines, Terry, Yoakum	93 min
May 14, 12:47 PM CDT	Tornado Watch	SPC	Andrews, Borden, Cochran, Coke, Crane, Dawson and 22 more	6 hr
May 14, 3:33 PM CDT	Mesoscale Discussion	SPC	Crockett, Edwards, Kerr, Kimble, Kinney, Menard and 5 more	27 min
May 14, 3:50 PM CDT	Tornado Watch	SPC	Bandera, Blanco, Brown, Burnet, Callahan, Coleman and 37 more	7 hr
May 14, 3:58 PM CDT	Mesoscale Discussion	SPC	Anderson, Bastrop, Bell, Brazos, Burleson, Falls and 9 more	92 min
May 14, 6:08 PM CDT	Mesoscale Discussion	SPC	Andrews, Borden, Cochran, Coke, Crane, Crosby and 27 more	67 min
May 14, 6:40 PM CDT	Mesoscale Discussion	SPC	Archer, Baylor, Clay, Foard, Hardeman, Knox and 2 more	95 min

Nearby

Mesoscale Discussions in Louisiana, 2008 Mesoscale Discussions in Mississippi, 2008 Mesoscale Discussions in Texas, 2008 Every mesoscale discussion in 2008

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.