Workers remove a fallen tree that crushed a gas station after strong Santa Ana winds hit Pasadena on December 1, 2011.
Southern California is littered with uprooted trees, crushed cars and downed traffic signals. Two separate weather systems channeled cold air from the north to the south, rather than the more typical flow from the hot interior of the state. Some climatologists say California could see a lot more Santa Ana windstorms. Reporter: Craig Miller