It stated in the north before it moved down the coast and parked itself in Southern California, causing hundreds of landslides and killing at least nine people, according to AP.
The final punch came Wednesday afternoon and evening as heavy rain drenched the region.
The forecast was for a potential additional 1 to 3 inches of rain in parts of Los Angeles and San Diego counties, with snow and thunderstorms coming at higher elevations.
After all of the rain and snow that came down over the past week, it wouldn’t take much for more water, mud, and boulders to slide down fragile hillsides, according to experts.