An atmospheric river storm dumped five months of rain in four days over Sonoma County, Calif., north of San Francisco. NBC News' national climate reporter Chase Cain reports on the latest river flood warning and snowfall totals on the West Coast.

The northwestern U.S. avoided getting hit by a second "bomb cycle" on Thursday when the storm's fury came up short of forecasts, but an ongoing "atmospheric river" deluged northern California with wind and rain.

A third winter storm is on its way to California, with forecasts anticipating that it will hit the Golden State on Friday, only days after a bomb cyclone unleashed hurricane-force winds across the Pacific Northwest and an atmospheric river brought a deluge of rain and snow.