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
