RSS Mesoscale Discussions from Storm Prediction Center
SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0640 AM CST Sat Dec 13 2025
Valid 131300Z - 141200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today or tonight.
...Discussion...
Large-scale trough amplification will occur over the Midwest/East
through tonight, with expanding surface high pressure across the
Plains and Midwest in the wake of a cold front progressing
south-southeastward toward the Lower Mississippi Valley and Gulf
Coast by late tonight and early Sunday. Preceding the front, weak
warm/moist advection should allow for northeastward-expanding
thunderstorm development across southeast Texas and Louisiana today,
with potential persisting until the frontal passage tonight.
A low-latitude disturbance crossing the Gulf and a northward
moisture flux ahead of it will contribute to thunderstorm potential
across the Florida Keys/Florida Straits today, and also across the
southern Florida Peninsula tonight. Severe thunderstorms are
unlikely with these scenarios.
..Guyer/Lyons.. 12/13/2025
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