SPC 0100Z Day 1 Outlook
Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0650 PM CST Sun Dec 28 2025 Valid 290100Z - 291200Z ...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF THE MIDWEST AND OHIO VALLEY... ...SUMMARY... Scattered severe thunderstorms remain possible over parts of the Midwest and Ohio Valley this evening. Severe/damaging wind gusts and perhaps a tornado are the primary threats. ...01z Update... Midlevel low is digging southeast across southeast SD early this evening. This feature is forecast to track across IA then eject into northern lower MI by the end of the period as an intense 500mb speed max translates into the OH Valley. In response to this short wave, surface low will deepen as it lifts north across lower MI overnight. The primary concern for deep convection, especially this evening, will be along the cold front as it surges across IN/western KY. Latest radar data exhibits a narrow, strongly forced line of convection from near Fort Wayne, IN southwest across southern IL into extreme northeast AR. This activity has progressed through the primary corridor of instability, but pre frontal air mass across the OH Valley remains adequately buoyant for surface-based convection, at least for the next several hours. Damaging winds should be the primary risk this evening, though a tornado or two can not be ruled out. ..Darrow.. 12/29/2025
