The West Coast will see a final round of rain and snow Friday as a multi-day atmospheric river concludes and shifts eastward, becoming the nation's next big winter storm.

The second in a pair of back-to-back storm systems moved across Southern California overnight, triggering small mudslides in the Palisades Fire burn area and keeping public works crews and first responders on alert.

A mudslide occurred overnight on Pacific Coast Highway just north of Big Rock Drive, covering all lanes of the roadway — which was closed at the time as a storm precaution. Caltrans officials said crews were examining the damage, and it was unclear how long it would take to clear the road.

Heavy rains in Southern California have led to mudslides and the closure of the Pacific Coast Highway in Malibu for safety reasons, with cleanup efforts underway.

Heavy overnight rain sent mud flowing onto the Pacific Coast Highway, leading to a full shutdown of the highway between Malibu and Santa Monica Friday, authorities said.

Following back-to-back storms this week, the rainfall triggered minor mudslides along the Palisades Fire burn area and Pacific Coast Highway in Malibu, keeping Caltrans workers busy as they work to remove mud and debris from roadways,