Alert archive / Mississippi / Mesoscale Discussions in 2022

Mesoscale Discussion 314

March 22, 20226 counties in Alabama; 10 parishes in Louisiana; 23 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Mar 22, 2022, 5:33 PM CDT for 6 counties in Alabama; 10 parishes in Louisiana; 23 counties in Mississippi. It was in force for 87 min.

The area

The outline as issued.

The facts

Issued: Mar 22, 2022, 5:33 PM CDT (22:33 UTC)
Expired: Mar 22, 2022, 7:00 PM CDT
In force: 87 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 61...62

All 39 counties

Choctaw County, AL, Clarke County, AL, Marengo County, AL, Mobile County, AL, Sumter County, AL, Washington County, AL, Ascension Parish, LA, Assumption Parish, LA, Livingston Parish, LA, Orleans Parish, LA, Saint Helena Parish, LA, Saint James Parish, LA, Saint John the Baptist Parish, LA, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Marion County, MS, Newton County, MS, Pearl River County, MS, Perry County, MS, Pike County, MS, Smith County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 95 km from the middle of the area, began a volume at 22:35 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The watches that followed

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

Tornado Watch 64Mar 22, 6:55 PM CDT

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 12:00Z, 10.6 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: 939 J/kg
Mixed-layer CIN: -19 J/kg
Mixed-layer LCL: 518 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 329 m²/s²
0-3 km storm-relative helicity: 474 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 7.8

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 22, 11:57 AM CDT	Mesoscale Discussion	SPC	Colbert, Cullman, Franklin, Lauderdale, Lawrence, Limestone and 3 more	2 hr
Mar 22, 12:42 PM CDT	Tornado Watch	SPC	Choctaw, Clarke, Colbert, Fayette, Franklin, Greene and 12 more	6 hr
Mar 22, 2:56 PM CDT	Mesoscale Discussion	SPC	Bibb, Choctaw, Clarke, Fayette, Franklin, Greene and 12 more	2 hr
Mar 22, 4:08 PM CDT	Tornado Watch	SPC	Autauga, Baldwin, Bibb, Blount, Butler, Chilton and 14 more	7 hr
Mar 22, 4:55 PM CDT	Mesoscale Discussion	SPC	Jackson	95 min
Mar 22, 5:57 PM CDT	Mesoscale Discussion	SPC	Bibb, Blount, Chilton, Cullman, Greene, Hale and 8 more	93 min
Mar 21, 7:03 PM CDT	Mesoscale Discussion	SPC	Bossier, Caddo, De Soto	57 min
Mar 21, 8:09 PM CDT	Tornado Watch	SPC	Bossier, Caddo, De Soto, Sabine, Webster	6 hr
Mar 21, 10:51 PM CDT	Mesoscale Discussion	SPC	Bossier, Caddo	114 min
Mar 22, 1:08 AM CDT	Mesoscale Discussion	SPC	Bossier, Caddo, De Soto, Webster	97 min
Mar 22, 1:58 AM CDT	Tornado Watch	SPC	Bienville, Bossier, Caddo, Claiborne, De Soto, Lincoln and 4 more	5 hr
Mar 22, 4:00 AM CDT	Mesoscale Discussion	SPC	Bienville, Claiborne, De Soto, Jackson, Lincoln, Natchitoches and 3 more	2 hr
Mar 22, 6:15 AM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 20 more	90 min
Mar 22, 7:08 AM CDT	Tornado Watch	SPC	Acadia, Allen, Avoyelles, Beauregard, Calcasieu, Caldwell and 19 more	8 hr
Mar 22, 9:43 AM CDT	Mesoscale Discussion	SPC	Acadia, Allen, Avoyelles, Cameron, Concordia, East Baton Rouge and 14 more	2 hr
Mar 22, 10:40 AM CDT	Tornado Watch	SPC	Ascension, Assumption, East Baton Rouge, East Feliciana, Iberia, Iberville and 19 more	8 hr
Mar 22, 12:19 PM CDT	Mesoscale Discussion	SPC	Saint Helena, Tangipahoa, Washington	116 min
Mar 22, 3:05 PM CDT	Mesoscale Discussion	SPC	Ascension, Assumption, East Baton Rouge, Livingston, Orleans, Saint Charles and 6 more	115 min

Nearby

Mesoscale Discussions in Mississippi, 2022 Mesoscale Discussions in Louisiana, 2022 Mesoscale Discussions in Alabama, 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; radar from the NEXRAD Level II archive.