A Winter Storm Warning is in effect until 4 p.m. Wednesday for northern Lake and Mendocino counties. Heavy snow is expected above 2,500 feet, with up to 14 inches above 3,500 feet, and snow is possible down to 1,500 feet. Today brings more rain and potential thunderstorms, with a chance of snow after 10 p.m. Rain and snow are expected Wednesday morning with minimal accumulation. Rain is also predicted Thursday through the weekend.