SPC 1200Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1134 PM CST Sun Dec 13 2020

Valid 141200Z - 151200Z


General thunderstorm activity is expected over parts of the

...Synopsis and Discussion...
A fast-moving shortwave trough will move from the southern
Appalachians across the Carolinas, approaching the coast by midday.
Low pressure will also shift quickly across the Carolinas, and will
be offshore by 18Z. Rain and a few thunderstorms will be present
across VA with lift north of the warm front, as well as farther
south near the low and trailing cold front into GA.

Forecast soundings indicate poor instability profiles will be
present across the warm sector, and low-level winds are likely to
rapidly veer before sufficient destabilization can occur for any
potential severe storms. Shear will be strong prior to frontal
passage, and a few strong gusts cannot be ruled out given low-60s F
dewpoints and weak instability. However, the overall severe threat
is currently expected to be sub-marginal.

..Jewell/Cook.. 12/14/2020

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