Severe Storm Outlook Narrative (AC)
Issued by NWS
Issued by NWS
442 ACUS02 KWNS 240656 SWODY2 SPC AC 240654 Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1254 AM CST Mon Nov 24 2025 Valid 251200Z - 261200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS OF THE DEEP SOUTH AND TENNESSEE VALLEY... ...SUMMARY... Isolated severe storms are possible across the Deep South into the Tennessee Valley on Tuesday and Tuesday night. ...Synopsis... A weak mid-level shortwave trough across the Tennessee Valley will dampen through the period as it advances into the western Atlantic after 00Z. A trough across the northern Plains will amplify through the period as it advances into the Upper Midwest and develops a closed upper low. A surface low will develop near Wisconsin/Lake Michigan and deepen through the day and into Tuesday night. As it deepens, a surface cold front will sharpen and accelerate east from the Great Lakes to the Lower Mississippi Valley. ...Deep South... A strong low-level jet will extend from northern MS/AL to southern Ohio Tuesday morning and will quickly move northeast through the day. This will result in weaker, more veered flow across the warm sector during the afternoon. Rising heights in the wake of the morning mid-level shortwave trough and weak convergence along the front may mitigate severe storm potential during much of the day, despite weak to moderate instability and moderate shear across much of the uncapped warm sector. However, scattered storms, some which could be strong, are expected along and ahead of the frontal zone during the afternoon and early evening. Damaging wind gusts will be the primary threat, but some isolated large hail may also occur across portions of MS/AL where greater instability is forecast. Overall, stronger forcing amid falling heights aloft and greater convergence along the cold front, is anticipated Tuesday night. However, weaker instability should mitigate the overall severe weather threat. A few stronger storms are possible after 06Z across the FL Panhandle into southeast Alabama and southwest Georgia where upper 60s dewpoints off the Gulf should be sufficient for moderate instability, even during the early morning hours. However, even if a few supercells can form during this period, severe potential may be somewhat limited given only modest mid-level lapse rates and weak low-level flow. ..Bentley.. 11/24/2025 $$