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,

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.

A powerful bomb cyclone associated with a major atmospheric river is forecast to drench the West Coast, from Washington to California, midweek, potentially leading to flooding.