The long-duration atmospheric river storm is likely to cause a slew of hazards over Christmas week across California, including widespread urban flooding, downed trees, power outages and travel delays ...

There will almost certainly be numerous mudslides, severe flooding either from heavy rain or clogged storm drains, and possibly debris flows,” the National Weather Service said.

After flooding rain the past few days, a more dangerous flood threat looms for California through Friday. Here's the latest forecast.