SPC 1730Z Day 2 Outlook

Day 2 Outlook Image

Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1119 AM CST Sun Dec 27 2020

Valid 281200Z - 291200Z

...NO SEVERE THUNDERSTORM AREAS FORECAST...

...SUMMARY...
Isolated thunderstorms will be possible on Monday along the coast of
southern California.

...Discussion...
Split flow aloft is expected across the U.S. Monday, as a
northern-stream trough shifts across the Great Lakes and Northeast,
while a southern-stream trough/low shifts inland over California and
then across the Intermountain West.

At the surface, a weak/fast-moving cold front will cross the
Northeast/New England, while a Pacific front shifts across the
Southwest.

While most of the country will remain stable, precluding thunder
potential, cold air/steep lapse rates aloft associated with the low
moving onshore may provide enough instability to support a few
lightning flashes near or just off the southern California coast. 
This activity should diminish as the upper system passes overnight.

..Goss.. 12/27/2020

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