The second peak of an ongoing atmospheric river storm arrived in Northern California Monday afternoon, prompting flood watches and a winter storm warning up in the Sierra.

This atmospheric river has brought heavy rain, flooding and strong wind gusts to Northern California. Wind gusts of 87 mph were reported north of San Francisco as well.

Malibu's Pacific Coast Highway, which just reopened after last month's devastating Palisades Fire, is closing again Tuesday due to concerns about potential mudslides, landslides and debris flows from a prolonged atmospheric river event.