Winter Weather Advisory issued December 19 at 4:16PM PST until December 22 at 10:00AM PST by NWS

...ANOTHER WINTER STORM SUNDAY AND MONDAY... AFTER A BREAK IN THE RAIN AND SNOW TONIGHT... ANOTHER WINTER STORM WILL SPREAD OVER NORTHERN CALIFORNIA SUNDAY AND MONDAY. LOWER SNOW LEVELS ARE EXPECTED WITH THIS SYSTEM AND AS A RESULT...HIGHER ELEVATIONS WEST OF THE SACRAMENTO VALLEY ARE LIKELY TO SEE SOME SIGNIFICANT SNOWFALL. OVER THE SIERRA SNOW

from Current Watches, Warnings and Advisories for the United States Issued by the National Weather Service http://ift.tt/1O0dSEf