A “once in a decade” bomb cyclone is sweeping through the northwest US and parts of Canada late Tuesday –– leaving at least one person dead and hundreds of thousands without power across Washington state,

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

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

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

Bomb cyclone is a term used by weather enthusiasts to describe a process that meteorologists usually call bombogenesis. It's the rapid intensification of a cyclone in a short period of time, and it can happen during powerful storms such as the one no rthern California and the Pacific Northwest are preparing for this week.

A powerful bomb cyclone is taking aim at the west coast. Heavy rain and strong winds are expected with at least a foot snow possible in parts of the mountains.

A powerful bomb cyclone is ripping the Pacific Northwest with hurricane-strength winds as the season’s first atmospheric river comes ashore in Northern California, promising torrential rains, floods and mudslides across the region.