Alert archive / Louisiana / Mesoscale Discussions in 2022

Mesoscale Discussion 359

March 30, 202216 parishes in Louisiana

The Storm Prediction Center issued this mesoscale discussion at Mar 30, 2022, 3:39 PM CDT for 16 parishes in Louisiana. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Mar 30, 2022, 3:39 PM CDT (20:39 UTC)
Expired: Mar 30, 2022, 5:45 PM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Tornado watch 76...78

Counties Ascension Parish, LA, Assumption Parish, LA, East Baton Rouge Parish, LA, East Feliciana Parish, LA, Iberia Parish, LA, Iberville Parish, LA, Livingston Parish, LA, Saint Charles Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Martin Parish, LA, St. Mary Parish, LA, Tangipahoa Parish, LA, West Baton Rouge Parish, LA, West Feliciana Parish, LA

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 8.7 hours before the alert went out and 150 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: 149 J/kg
Mixed-layer CIN: -215 J/kg
Mixed-layer LCL: 570 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 294 m²/s²
0-3 km storm-relative helicity: 417 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 30, 4:57 AM CDT	Mesoscale Discussion	SPC	Bossier, Caddo, Webster	2 hr
Mar 30, 5:30 AM CDT	Tornado Watch	SPC	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 11 more	8 hr
Mar 30, 10:29 AM CDT	Mesoscale Discussion	SPC	Allen, Beauregard, Bienville, Caldwell, Catahoula, Claiborne and 18 more	61 min
Mar 30, 11:26 AM CDT	Tornado Watch	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Cameron and 10 more	8 hr
Mar 30, 12:16 PM CDT	Tornado Watch	SPC	Caldwell, Catahoula, Concordia, East Carroll, Franklin, Grant and 11 more	9 hr
Mar 30, 12:47 PM CDT	Mesoscale Discussion	SPC	Allen, Avoyelles, Caldwell, Catahoula, Concordia, East Carroll and 10 more	58 min
Mar 30, 1:48 PM CDT	Tornado Watch	SPC	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 16 more	9 hr
Mar 30, 2:16 PM CDT	Mesoscale Discussion	SPC	East Carroll, Madison, Tensas, West Carroll	119 min
Mar 30, 6:31 PM CDT	Mesoscale Discussion	SPC	Orleans, Saint Charles, Saint James, Saint John the Baptist, Saint Tammany	119 min

Nearby

Mesoscale Discussions in Louisiana, 2022 Every mesoscale discussion in 2022

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.