Some San Francisco roadways and neighborhoods experienced minor flooding Friday as the atmospheric river dumped heavy rain on the city.

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 first atmospheric river storm of the winter rainy season slammed into California on Wednesday. Driven by a powerful “bomb cyclone” off British Columbia, it brought heavy rains to Sonoma and Marin counties, dumping more than 6 inches in the hills above Guerneville by mid-afternoon.

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.

SAN FRANCISCO - An atmospheric river is bringing heavy rain to San Francisco on Friday, flooding roads across the city. Video shows rising waters in the Marina District and flooded sidewalks along 23rd and Dolores streets. Another video shows cars driving through flooded streets at Henry Adams and Division in the Design District near I-80.