Alert archive / Mississippi / Mesoscale Discussions in 2026

Mesoscale Discussion 18

January 10, 2026Sumter County, Alabama; 17 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jan 10, 2026, 2:04 AM CST for Sumter County, Alabama; 17 counties in Mississippi. It was in force for 116 min.

The area

The outline as issued.

The facts

Issued: Jan 10, 2026, 2:04 AM CST (08:04 UTC)
Expired: Jan 10, 2026, 4:00 AM CST
In force: 116 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 2

Counties Sumter County, AL, Clarke County, MS, Copiah County, MS, Covington County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Madison County, MS, Neshoba County, MS, Newton County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 51 km from the middle of the area, began a volume at 08:03 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 3Jan 10, 3:50 AM CST

The nearest sounding before it

Jackson, MS (KJAN), launched 00:00Z, 8.1 hours before the alert went out and 60 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: 173 J/kg
Mixed-layer CIN: -100 J/kg
Mixed-layer LCL: 763 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: -47 m²/s²
0-3 km storm-relative helicity: 69 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
Jan 10, 3:49 AM CST	Tornado Watch	SPC	Autauga, Barbour, Bibb, Bullock, Calhoun, Chambers and 31 more	9 hr
Jan 10, 7:04 AM CST	Mesoscale Discussion	SPC	Autauga, Chilton, Dallas, Marengo, Perry, Wilcox	116 min
Jan 10, 9:21 AM CST	Mesoscale Discussion	SPC	Bullock, Chambers, Elmore, Lee, Lowndes, Macon and 3 more	84 min
Jan 9, 6:40 PM CST	Mesoscale Discussion	SPC	Adams, Amite, Claiborne, Copiah, Covington, Forrest and 17 more	2 hr
Jan 9, 7:46 PM CST	Tornado Watch	SPC	Adams, Amite, Claiborne, Clarke, Copiah, Covington and 24 more	13 hr
Jan 9, 11:07 PM CST	Mesoscale Discussion	SPC	Adams, Amite, Claiborne, Clarke, Copiah, Covington and 24 more	2 hr

Nearby

Mesoscale Discussions in Mississippi, 2026 Mesoscale Discussions in Alabama, 2026 Every mesoscale discussion in 2026

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.