Millions of Americans live in areas under winter storm alerts stretching from northern Minnesota to the Eastern Seaboard.

Parts of the state are forecast to experience moderate to major coastal flooding, inland flash flooding, winds up to 60 mph, up to 5 inches of rain and high surf, potentially causing beach erosion.

A major atmospheric river is drenching Southern California with heavy rain expected through Christmas morning and lingering showers into the weekend. Rainfall totals are forecast to range from 3 ...