SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook NWS Storm Prediction Center Norman OK 1124 AM CST Mon Dec 14 2020 Valid 151200Z - 161200Z ...NO SEVERE THUNDERSTORM AREAS FORECAST... ...SUMMARY... Organized severe thunderstorms are not expected across the contiguous United States on Tuesday. ...Synopsis and Discussion... An upper trough will move eastward across the southern/central Plains on Tuesday, eventually reaching the lower/mid MS Valley and Southeast late Tuesday night. A prior surface frontal intrusion into the Gulf of Mexico will likely limit thunderstorm potential across the CONUS through much of the day, as substantial low-level moisture should remain confined to parts of the FL Peninsula. A gradual return of modest low-level moisture may occur late Tuesday evening/night across parts of coastal LA/MS/AL. As strong forcing for ascent associated with the upper trough overspreads this region, there may be just enough MUCAPE (100-200 J/kg) to support isolated lightning flashes with any elevated convection that develops along/near the central Gulf Coast late Tuesday. Severe storms are not anticipated across this region owing to the modest low-level moisture and minimal boundary-layer instability forecast. ..Gleason.. 12/14/2020
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