Day 4-8 Outlook
Day 4-8 Convective Outlook NWS Storm Prediction Center Norman OK 0342 AM CST Wed Dec 24 2025 Valid 271200Z - 011200Z ...DISCUSSION... This weekend, a mid-level ridge will move from the mid Mississippi Valley eastward to the Atlantic Seaboard, as a trough digs southeastward into the north-central U.S. A moist airmass will advect northeastward into the Ohio and Tennessee Valleys, ahead of a cold front moving through the mid Mississippi Valley. Thunderstorm development, mostly post-frontal in nature, will be possible Sunday afternoon from the Arkansas River Valley northeastward into the Ohio Valley. Although an isolated severe threat may develop, the storms should be elevated and the threat will be limited by weak instability. On Monday, the cold front is forecast to move to the southern Atlantic Seaboard, with a dry and cool airmass residing over much of the nation. This dry airmass is forecast to remain in place through mid-week, keeping the chance for thunderstorms low across the continental U.S.
