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Mesoscale Discussion 2309
NWS Storm Prediction Center Norman OK
0739 PM CST Sat Dec 28 2024

Areas affected...southeastern Louisiana...southern Mississippi...and
southern Alabama

Concerning...Tornado Watch 720...721...

Valid 290139Z - 290245Z

The severe weather threat for Tornado Watch 720, 721 continues.

SUMMARY...Threat for damaging winds and tornadoes continue within
WW720 and WW721.

DISCUSSION...A broken line of thunderstorms with embedded supercell
structures continues to move eastward across southern
Louisiana/Mississippi. Within the line, mesovortex structures
continue to be observed on radar. Ahead of this line, semi-discrete
cells continue to move northward and quickly merge with the line.
Given this mixed mode, the threat for damaging wind and a tornado or
two will continue for the next few hours. 

Ahead of this line near the marine front draped across southern
Alabama, a supercell has moved inland and continues to exhibit
mid-level rotation. This cell will eventually move northward into
more stable air north of the marine boundary but may continue to
pose risk for a tornado as it moves within mid to upper 60s dew
point air with deep layer shear around 35-45 kts.

..Thornton/Gleason.. 12/29/2024

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

ATTN...WFO...MOB...JAN...LIX...LCH...

LAT...LON   29769250 30439153 31618979 31518798 31358732 30758687
            30248687 29648731 29128880 29259019 29429104 29769250