California finally got its first real taste of winter weather Monday as a substantial rainstorm swept through the state, causing numerous traffic accidents and bringing warnings of flooding and mudslides in areas burned by wildfires. The National Weather Service said much of the Sacramento Valley could receive up to 2 inches of rain by the time the storm winds down late Tuesday or early Wednesday. Although the storm started out fairly warm, bringing mostly rain, parts of the Sierra Nevada could expect as much as 30 inches of snow.