Over a month’s worth of rain, hurricane-force wind gusts and feet of mountain snow are coming to parts of the Pacific Northwest and Northern California.

A massive plume of moisture from the Pacific called an atmospheric river will hit the West Coast on Tuesday afternoon and last into Friday.

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.