SPC 1730Z Day 2 Outlook

Day 2 Outlook Image

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1124 AM CST Mon Dec 14 2020

Valid 151200Z - 161200Z


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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