Probabilistic Heavy Snow and Icing Discussion
NWS Weather Prediction Center College Park MD
144 AM EST Tue Dec 19 2023

Valid 12Z Tue Dec 19 2023 - 12Z Fri Dec 22 2023


...Sierra Nevada to Southern California...
Days 1-3
An upper low settling south off of the California coast is
expected to bring heavy snow to portions of the Sierra Nevada over
the next few days.  Snow levels which are at or above 8000 ft for
much of the Sierra this morning, will dip to between 7000-8000 ft
tonight and remain there through the remainder of the period. 
Heaviest accumulations are expected to occur today before the
winds begin to back and the moisture flux into the region starts
to diminish.  WPC PWPF shows moderate to high probabilities for
accumulations of 8 inches or more through early Wednesday for
areas above 8000 ft in the central Sierra.  The focus for heavier
amounts shifts a little farther south Wednesday into early
Thursday, however with diminishing moisture the probabilities for
heavy snow accumulations begin to drop as well.

As the low continues to drop south, heavy precipitation including
mountain snow is forecast to develop over Southern California. 
However, snow levels across the region are expected to remain at
or above 7000 ft, limiting any potential impacts.   

Pereira