Alert archive / Louisiana / Severe Thunderstorm Watches in 2005

Severe Thunderstorm Watch 347

May 29, 200528 parishes in Louisiana; 22 counties in Mississippi

The Storm Prediction Center issued this severe thunderstorm watch at May 29, 2005, 8:00 AM CDT for 28 parishes in Louisiana; 22 counties in Mississippi. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: May 29, 2005, 8:00 AM CDT (13:00 UTC)
Expired: May 29, 2005, 4:00 PM CDT
In force: 8 hr
Issued by: the Storm Prediction Center

All 50 counties

Acadia Parish, LA, Ascension Parish, LA, Assumption Parish, LA, Avoyelles Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Evangeline Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Lafayette Parish, LA, Livingston Parish, LA, Orleans 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, Vermilion Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA, Amite County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Lincoln County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS, Wilkinson County, MS

Warnings issued inside it

9 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
May 29, 9:58 AM CDT	Severe Thunderstorm Warning	LIX	Jackson	53 min
May 29, 12:33 PM CDT	Severe Thunderstorm Warning	JAN	Jefferson Davis, Lawrence, Lincoln	42 min
May 29, 12:39 PM CDT	Severe Thunderstorm Warning	LIX	Pearl River	36 min
May 29, 12:45 PM CDT	Severe Thunderstorm Warning	JAN	Forrest, Lamar, Marion	60 min
May 29, 1:03 PM CDT	Severe Thunderstorm Warning	JAN	Copiah, Covington, Rankin, Simpson, Smith	57 min
May 29, 1:20 PM CDT	Severe Thunderstorm Warning	JAN	Covington, Jasper, Jones	55 min
May 29, 3:20 PM CDT	Tornado Warning	LIX	Ascension, Livingston	25 min
May 29, 3:36 PM CDT	Tornado Warning	LIX	Hancock	26 min
May 29, 3:56 PM CDT	Severe Thunderstorm Warning	LIX	Harrison	49 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 1.0 hours before the alert went out and 139 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

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, 7:38 AM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Ascension, Assumption, Avoyelles, Cameron and 23 more	2 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

Severe Thunderstorm Watches in Louisiana, 2005 Severe Thunderstorm Watches in Mississippi, 2005 Every severe thunderstorm watch 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.