Following the bomb cyclone, the region faces days of rain, flooding and snow at higher elevations, the National Weather Service said Wednesday. That's part of an atmospheric river that could bring over a foot of rain to some areas.

A powerful atmospheric river is slamming into Northern California and is expected to persist for days. Its effects, coupled with a bomb cyclone offshore, are being felt across the Pacific Northwest.

Storm system is expected to weaken as it continues to chart a path over the Cascades and through to northern California and southwest Oregon by Friday