SPC 1200Z Day 1 Outlook

Day 1 Outlook Image

Day 1 Convective Outlook  
NWS Storm Prediction Center Norman OK
1107 PM CST Sun Dec 27 2020

Valid 281200Z - 291200Z


Isolated thunderstorms are possible along the coast of southern

...Southern California...

Strong mid-level height falls are forecast to spread across southern
CA early in the day1 period as a strong 500mb speed max translates
toward the lower CO River Valley. Along and north of this jet,
cooling profiles and steepening lapse rates will become increasingly
favorable for weak convection. Forecast soundings along the southern
CA coast suggest surface-based convection is possible within an
environment characterized by a few hundred J/kg CAPE. Lightning
probabilities will gradually sag south during the day, ultimately
waning during the late evening hours near the international border.

..Darrow.. 12/28/2020

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