The Atmospheric River and the Bomb Cyclone are colliding this week in the northern Pacific Ocean which is a really powerful combination

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https://www.newsweek.com/winter-storm-warning-whiteout-conditions-1988107

 The news comes as two powerful weather systems are due to collide and combine forces this week, when an "atmospheric river" and a "bomb cyclone" meet in the Northwest. The atmospheric river (water vapor in the sky) will dump rain and snow, while the bomb cyclone (a rapid drop in pressure) will crank up the storm's intensity. Meanwhile, other areas of the country will face their own winter storms.