A series of storms fueled by a strong atmospheric river is taking aim at the Bay Area and Northern California, intensified by a so-called "bomb cyclone" that promises heavy rain and potential flooding.

The West Coast is preparing for a long-duration heavy rain event from a bomb cyclone set to form Tuesday.Threat level: The rapidly intensifying storm, taking shape in the northeastern Pacific Ocean, is forecast to direct a strong atmospheric river at southwestern Oregon and Northern California for days on end.

A strong atmospheric river storm is headed for Northern California this week, bringing heavy rain, mountain snow, high winds and the potential for flooding.