Alert archive / Mississippi / Mesoscale Discussions in 2024

Mesoscale Discussion 53

January 12, 20244 states

The Storm Prediction Center issued this mesoscale discussion at Jan 12, 2024, 7:55 AM CST for 4 states. It was in force for 95 min.

The area

The outline as issued.

The facts

Issued: Jan 12, 2024, 7:55 AM CST (13:55 UTC)
Expired: Jan 12, 2024, 9:30 AM CST
In force: 95 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 10

All 60 counties

Lamar County, AL, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Tensas Parish, LA, Alcorn County, MS, Attala County, MS, Benton County, MS, Calhoun County, MS, Carroll County, MS, Chickasaw County, MS, Choctaw County, MS, Claiborne County, MS, Clay County, MS, Copiah County, MS, DeSoto County, MS, Grenada County, MS, Hinds County, MS, Holmes County, MS, Humphreys County, MS, Issaquena County, MS, Itawamba County, MS, Jasper County, MS, Kemper County, MS, Lafayette County, MS, Leake County, MS, Lee County, MS, Leflore County, MS, Lowndes County, MS, Madison County, MS, Marshall County, MS, Monroe County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Panola County, MS, Pontotoc County, MS, Prentiss County, MS, Rankin County, MS, Scott County, MS, Sharkey County, MS, Simpson County, MS, Smith County, MS, Sunflower County, MS, Tallahatchie County, MS, Tate County, MS, Tippah County, MS, Tishomingo County, MS, Union County, MS, Warren County, MS, Webster County, MS, Winston County, MS, Yalobusha County, MS, Yazoo County, MS, Fayette County, TN, Hardeman County, TN, McNairy County, TN, Shelby County, TN

The radar

The Jackson/Brandon,MS radar (KDGX), 121 km from the middle of the area, began a volume at 13:56 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 nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 1.9 hours before the alert went out and 117 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: 106 J/kg
Mixed-layer CIN: -64 J/kg
Mixed-layer LCL: 502 m above ground
0-6 km bulk shear: 94 kt
0-1 km storm-relative helicity: 576 m²/s²
0-3 km storm-relative helicity: 685 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 4.0

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
Jan 12, 10:11 AM CST	Mesoscale Discussion	SPC	Choctaw, Clarke, Dallas, Fayette, Greene, Hale and 10 more	4 hr
Jan 12, 3:18 PM CST	Mesoscale Discussion	SPC	Houston	2 hr
Jan 11, 9:56 PM CST	Tornado Watch	SPC	Bossier, Caddo, Claiborne, Webster	6 hr
Jan 12, 2:41 AM CST	Mesoscale Discussion	SPC	Bienville, Bossier, Caddo, Claiborne, De Soto, Lincoln and 1 more	94 min
Jan 12, 3:33 AM CST	Mesoscale Discussion	SPC	East Carroll, Franklin, Jackson, Madison, Morehouse, Ouachita and 2 more	87 min
Jan 12, 3:57 AM CST	Tornado Watch	SPC	Bienville, Bossier, Caddo, Caldwell, Claiborne, De Soto and 15 more	7 hr
Jan 12, 6:14 AM CST	Mesoscale Discussion	SPC	East Carroll, Morehouse, West Carroll	91 min
Jan 12, 1:13 AM CST	Mesoscale Discussion	SPC	DeSoto, Tate, Tunica	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2024 Mesoscale Discussions in Louisiana, 2024 Mesoscale Discussions in Tennessee, 2024 Every mesoscale discussion in 2024

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.