The storm poses significant risks across California. Coastal areas, including San Francisco Bay and Monterey Bay, face flooding from elevated tides and high surf, with waves potentially overtopping seawalls. Inland regions, such as the Sacramento Valley, may experience strong winds and localized street flooding. The Sierra Nevada is under a Winter Storm Warning, with heavy snow and strong winds creating hazardous travel conditions on mountain highways. Thunderstorms along the cold front could bring lightning, small hail, and brief heavy downpours. Residents in low-lying and coastal areas are particularly vulnerable to flooding, while travelers in mountain regions should prepare for snow-covered roads and reduced visibility.