Atmospheric river soaks Bay Area — and it's not finished Published on April 07, 2018 at 08:46AM by By Peter Fimrite and Sophie Haigney A major storm blew into the Bay Area overnight, causing minor flooding, a few major accidents and snarled traffic on roadways. The storm began around 10 p.m. Thursday and was expected to continue through at least Saturday morning. As of early Friday, a little more than a half inch of rain had fallen in downtown San Francisco. Parts of the North Bay had seen closer to an inch. “It’s going to be a rain-soaker, if you will,” said Brian Mejia, a forecaster with the National Weather Service. Up to three inches of rain are expected in San Francisco with the coastal hills forecast for as much as six inches.