Higher elevations of the Mother Lode will see the first significant snowfall of the season this week, while the foothills will see rain through Wednesday, the National Weather Service reported.
The Weather Service has issued a "winter storm warning" for the Central Sierra, meaning mountain drivers should be prepared for snow, carrying chains, blankets and taking extra precautions while on the road.
An advisory concerning the possibility of gusty winds, hail and lightning in the Central Valley and foothills today was also issued.
The snowline elevation for this series of storm is forecast at 6,000 feet.
Overnight snow was enough to close Sonora, Tioga and Ebbetts passes. They were all still closed this morning, according to Caltrans. Kirkwood Mountain Resort measured 2 inches of snow in the past 24 hours.
Chains are required from Strawberry to 26.4 miles east until the pass closure.
Precipitation is likely through Tuesday evening and chances of foothill rain and mountain snow through Wednesday, the National Weather Service said. Skies are expected to clear by Thursday, with mostly sunny conditions prevailing for the weekend.
Temperatures are expected to remain cool through most of the week with highs in the upper 50s to low 60s in the foothills through Thursday.
The storm delivered 0.05 inches of rain to Sonora by 6 a.m today. Angels Camp received 0.06 inches.
The rainfall brought Sonora's seasonal total to 0.36 inches. Angels Camp's total was 0.29.