The storm, driven by the season’s first major atmospheric river, inundated the region, killing at least two people and causing widespread power outages.

A second powerful wind storm, called a “bomb cyclone,” will hit the Pacific Northwest by this evening, even as hundreds of thousands of people remain without power from the torrential rain and snow still falling from the first one.

Forecasters said a final round of rain, snow and high winds were targeting the Pacific Northwest and Northern California regions on Friday.

The Northwest is bracing for a strong storm system to move in this week, fueled by an atmospheric river​ and bomb cyclone. What do those terms mean?

With millions of people preparing to travel for the Thanksgiving holiday, two strong storm systems are bringing high winds, heavy rain and snowfall to a large swath of the United States this week.