California is experiencing a significant return of winter weather, with multiple storms set to impact various regions. The Sierra Nevada is forecasted to receive substantial snowfall, with estimates ranging from 5 to 10 feet in the coming days, particularly in areas like Tahoe City and Mammoth. A winter weather advisory is in effect across several counties, including Yosemite and Mono, due to expected travel difficulties from heavy snow and strong winds. Northern California, including Sacramento, is also bracing for rain, contributing to winter travel alerts as conditions worsen. Travelers are advised to exercise caution, especially in the Sierra, where chain controls are likely to be enforced due to poor visibility and hazardous roads.