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 storm is expected to become a bomb cyclone -- which means the pressure in the center of the storm will drop 24 millibars within 24 hours.

An intense mid-latitude cyclone taking aim at the West Coast of the United States this week, ushering a strong atmospheric river into Oregon and California. This low-pressure system is going through bombogenesis,

The United States is on high alert as a powerful bomb cyclone, combined with a potent atmospheric river, is poised to unleash extreme weather across the west coast this week.

A powerful “bomb cyclone” will combine with an atmospheric river to ... Powerful winds will slam parts of the West Coast Tuesday night. Reds and purples represent the strongest winds from the storm. Yellows and oranges are still quite gusty.

The United States is on edge as a massive bomb cyclone, fueled by an intense atmospheric river, is poised to wreak havoc across the West Coast. This powerful weather system, set to hit this week, brings with it hurricane-force winds,

A formidable 'bomb cyclone' driven by a powerful Category 5 atmospheric river is predicted to hit the West Coast of the United State..|News Track

A powerful winter storm brewing near the Pacific Northwest known as a bomb cyclone is dragging an atmospheric river.

A low-pressure system headed for Northern California and Oregon is likely to bring extreme rain and strong winds.

Starting Tuesday, the Pacific Northwest could get at least 6 inches of rain, with 20-plus inches possible in the mountains. Strong winds could cause power outages.