Alert archive / Mississippi / Mesoscale Discussions in 2022

Mesoscale Discussion 403

April 5, 2022Ashley County, Chicot County, Arkansas; 22 parishes in Louisiana; 33 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Apr 5, 2022, 1:47 AM CDT for Ashley County, Chicot County, Arkansas; 22 parishes in Louisiana; 33 counties in Mississippi. It was in force for 2 hr.

The area

The outline as issued.

The facts

Issued: Apr 5, 2022, 1:47 AM CDT (06:47 UTC)
Expired: Apr 5, 2022, 4:15 AM CDT
In force: 2 hr
Issued by: the Storm Prediction Center
Concerning: Severe potential...watch likely
Chance of a watch: 80%

All 57 counties

Ashley County, AR, Chicot County, AR, Avoyelles Parish, LA, Caldwell Parish, LA, Catahoula Parish, LA, Concordia Parish, LA, East Baton Rouge Parish, LA, East Carroll Parish, LA, East Feliciana Parish, LA, Franklin Parish, LA, Livingston Parish, LA, Madison Parish, LA, Morehouse Parish, LA, Ouachita Parish, LA, Pointe Coupee Parish, LA, Richland Parish, LA, Saint Helena Parish, LA, Tangipahoa Parish, LA, Tensas Parish, LA, Union Parish, LA, Washington Parish, LA, West Baton Rouge Parish, LA, West Carroll Parish, LA, West Feliciana Parish, LA, Adams County, MS, Amite County, MS, Claiborne County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Franklin County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Jasper County, MS, Jefferson County, MS, Jefferson Davis County, MS, Jones County, MS, Lamar County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Madison County, MS, Marion County, MS, Pearl River County, MS, Pike County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Walthall County, MS, Warren County, MS, Washington County, MS, Wilkinson County, MS, Yazoo County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 94 km from the middle of the area, began a volume at 06:50 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 94Apr 5, 3:15 AM CDT

The nearest sounding before it

Slidell Radar S, LA (KSIL), launched 00:00Z, 6.8 hours before the alert went out and 201 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: 89 J/kg
Mixed-layer CIN: -263 J/kg
Mixed-layer LCL: 923 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 128 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.1

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
Apr 4, 10:51 PM CDT	Tornado Watch	SPC	Columbia, Lafayette, Miller	5 hr
Apr 5, 3:18 AM CDT	Tornado Watch	SPC	Ashley, Chicot, Union	8 hr
Apr 5, 10:30 AM CDT	Mesoscale Discussion	SPC	East Baton Rouge, Iberville, Livingston, Saint Martin, Saint Tammany, Tangipahoa and 2 more	60 min
Apr 5, 6:27 AM CDT	Mesoscale Discussion	SPC	Forrest, George, Greene, Harrison, Jackson, Perry and 2 more	3 hr
Apr 5, 6:51 AM CDT	Tornado Watch	SPC	George, Greene, Harrison, Jackson, Perry, Stone and 1 more	8 hr
Apr 5, 8:45 AM CDT	Mesoscale Discussion	SPC	Forrest, George, Greene, Lamar, Marion, Perry and 2 more	90 min

Nearby

Mesoscale Discussions in Mississippi, 2022 Mesoscale Discussions in Louisiana, 2022 Mesoscale Discussions in Arkansas, 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.