A third day of an atmospheric river storm has inundated Northern California and the Bay Area, with the storm spreading from the North Bay south across the region, flooding creeks, roads, and low-lying areas.

A developing storm system forecast to swing off the Oregon and Washington coastline on Friday will add to the region's weather woes.

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.