Alert archive / Louisiana / Mesoscale Discussions in 2005

Mesoscale Discussion 1050

May 29, 200529 parishes in Louisiana; 14 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at May 29, 2005, 7:38 AM CDT for 29 parishes in Louisiana; 14 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: May 29, 2005, 7:38 AM CDT (12:38 UTC)
Expired: May 29, 2005, 9:45 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center

All 43 counties

Acadia Parish, LA, Allen Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, Cameron Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Jefferson Davis Parish, LA, Lafayette Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Pointe Coupee 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, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Stone County, MS, Walthall County, MS, Wilkinson County, MS

The watches that followed

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

Severe Thunderstorm Watch 347May 29, 8:00 AM CDT

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 0.6 hours before the alert went out and 129 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: 795 J/kg
Mixed-layer CIN: -67 J/kg
Mixed-layer LCL: 1045 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 89 m²/s²
0-3 km storm-relative helicity: 101 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 2.7

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 28, 10:25 PM CDT	Mesoscale Discussion	SPC	Grant, Natchitoches, Rapides, Red River, Sabine, Vernon and 1 more	95 min
May 29, 8:00 AM CDT	Severe Thunderstorm Watch	SPC	Acadia, Ascension, Assumption, Avoyelles, East Baton Rouge, East Feliciana and 22 more	8 hr
May 29, 10:48 AM CDT	Mesoscale Discussion	SPC	Ascension, Catahoula, Concordia, East Baton Rouge, East Feliciana, Livingston and 12 more	87 min
May 29, 12:40 PM CDT	Severe Thunderstorm Watch	SPC	East Carroll, Madison, West Carroll	7 hr
May 29, 4:45 PM CDT	Severe Thunderstorm Watch	SPC	Allen, Avoyelles, Beauregard, Catahoula, Concordia, East Baton Rouge and 17 more	7 hr
May 29, 6:20 PM CDT	Mesoscale Discussion	SPC	Allen, Avoyelles, Beauregard, Catahoula, Concordia, East Baton Rouge and 20 more	85 min
May 29, 2:34 PM CDT	Mesoscale Discussion	SPC	Attala, Carroll, Choctaw, Clarke, Holmes, Kemper and 10 more	56 min

Nearby

Mesoscale Discussions in Louisiana, 2005 Mesoscale Discussions in Mississippi, 2005 Every 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.