SPC 0730Z Day 3 Outlook
Day 3 Convective Outlook NWS Storm Prediction Center Norman OK 0157 AM CDT Sat Sep 26 2020 Valid 281200Z - 291200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Thunderstorms are possible along a cold front as it moves across the southern Plains and Mississippi and Ohio Valleys. ...Synopsis... Upper pattern will continue to amplify on Monday as troughing across the central and eastern CONUS deepens further while gradually moving eastward and western CONUS ridging also expands eastward. Strong mid-level flow is forecast to exist throughout the base of this trough, arcing from the High Plains southward into the southern Plains and then back northeastward through the Upper Great Lakes. Cold front along the leading edge of the continental air mass associated with the upper trough will likely extend from southwestern Ontario southwestward into the TX Hill Country early Monday morning. Continued eastward/southeastward progression of this front is forecast throughout the day, with the front expected to extend from a low over the Lower Great Lakes region southwestward into the northwestern Gulf of Mexico by Monday evening. ...Mid/Upper OH Valley... Modest low-level moisture and deep southwesterly flow may contribute to a few more robust updrafts near the cold front as it gradually pushes eastward across the region. However, low forecast confidence regarding the frontal position, as well as the potential for preceding cloud cover to limit the extent of destabilization ahead of the front, result in too much uncertainty to introduce any probabilities with this outlook. ..Mosier.. 09/26/2020
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