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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