Alert archive / Louisiana / Mesoscale Discussions in 2025

Mesoscale Discussion 13

January 5, 20256 parishes in Louisiana; 5 counties in Mississippi

The Storm Prediction Center issued this mesoscale discussion at Jan 5, 2025, 2:02 PM CST for 6 parishes in Louisiana; 5 counties in Mississippi. It was in force for 88 min.

The area

The outline as issued.

The facts

Issued: Jan 5, 2025, 2:02 PM CST (20:02 UTC)
Expired: Jan 5, 2025, 3:30 PM CST
In force: 88 min
Issued by: the Storm Prediction Center
Concerning: Tornado watch 2

Counties East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Richland Parish, LA, Tensas Parish, LA, West Carroll Parish, LA, Claiborne County, MS, Issaquena County, MS, Sharkey County, MS, Warren County, MS, Washington County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 123 km from the middle of the area, began a volume at 20:05 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, 8.0 hours before the alert went out and 113 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 588 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 464 m²/s²
0-3 km storm-relative helicity: 542 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

448 
ACUS11 KWNS 052003
SWOMCD
SPC MCD 052002 
MSZ000-LAZ000-ARZ000-052130-

Mesoscale Discussion 0013
NWS Storm Prediction Center Norman OK
0202 PM CST Sun Jan 05 2025

Areas affected...far northeast Louisiana into west-central MS

Concerning...Tornado Watch 2...

Valid 052002Z - 052130Z

The severe weather threat for Tornado Watch 2 continues.

SUMMARY...Tornado potential appears to be increasing across far
northeast Louisiana into southwest Mississippi.

DISCUSSION...A favorable environment for increased severe activity
is developing across northeast LA into adjacent portions of
west-central MS this afternoon. Temperatures have warmed into the
upper 60s to low 70s amid cloud breaks, and surface dewpoints are in
the 62-66 F range. This is allowing for some greater destabilization
within an area of strong surface pressure falls (around 4 mb the
past 2 hours) and greater low-level confluence. Semi-discrete
convection ongoing in this area, as well as deepening convection
moving into this region from central LA, may pose a greater tornado
risk over the next 1-2 hours.

..Leitman.. 01/05/2025

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...JAN...SHV...

LAT...LON   33139146 33349107 33269078 33069053 32769046 32259049
            31859083 31839139 31909176 32049192 32319194 32669169
            32759165 33139146

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 5, 9:08 AM CST	Mesoscale Discussion	SPC	Bienville, Bossier, Caddo, Claiborne, De Soto, Grant and 9 more	3 hr
Jan 5, 10:29 AM CST	Tornado Watch	SPC	Allen, Beauregard, Bienville, Bossier, Caddo, Caldwell and 16 more	8 hr
Jan 5, 12:23 PM CST	Mesoscale Discussion	SPC	Caldwell, Grant, Jackson, LaSalle, Lincoln, Natchitoches and 5 more	97 min
Jan 5, 1:09 PM CST	Mesoscale Discussion	SPC	Avoyelles, Catahoula, Concordia, East Baton Rouge, East Carroll, East Feliciana and 11 more	96 min
Jan 5, 1:36 PM CST	Tornado Watch	SPC	Avoyelles, Catahoula, Concordia, East Baton Rouge, East Carroll, East Feliciana and 11 more	9 hr
Jan 5, 3:19 PM CST	Mesoscale Discussion	SPC	Allen, Beauregard, Grant, LaSalle, Natchitoches, Rapides and 2 more	86 min

Nearby

Mesoscale Discussions in Louisiana, 2025 Mesoscale Discussions in Mississippi, 2025 Every mesoscale discussion in 2025

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.