SPC AC 250628 Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0128 AM CDT Fri Sep 25 2020 Valid 271200Z - 281200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS NORTHERN PORTIONS OF THE SOUTHERN PLAINS AND OZARK PLATEAU.... ...SUMMARY... Isolated hail is possible late Sunday afternoon through Sunday evening across northern portions of the southern Plains and adjacent Ozark Plateau. ...Synopsis and Discussion... Overall upper pattern is forecast to undergo significant amplification on Sunday as a strong shortwave trough digs southeastward from the northern Rockies through the central Plains. A cold front is expected to extend from northern Lower MI southwestward into the northern TX Panhandle early Sunday. The overall evolution of the upper pattern is expected to induce a southward/southeastward surge of this cold front throughout the day. By Sunday evening, this cold front will likely extend from Lake Erie southwestward into the TX Permian Basin. Showers and thunderstorms are anticipated along this front, from the Upper Great Lakes into the southern Plains. Relatively warm and moist conditions are anticipated across the southern Plains and Ozark Plateau ahead of the front. However, warm mid-level temperatures will likely preclude the development of open warm sector storms. Even so, storms are anticipated along and behind the front, particularly as it moves into the southern Plains, interacting with more buoyancy and a strengthening low-level jet. Progressive nature of the cold front will likely contribute to the development of predominantly elevated storms. Moderate vertical shear could result in a few updrafts capable of producing hail. ..Mosier.. 09/25/2020 CLICK TO GET WUUS03 PTSDY3 PRODUCT NOTE: THE NEXT DAY 3 OUTLOOK IS SCHEDULED BY 0730Z