A "bomb cyclone" swept across the northwest U.S., knocking down trees, causing widespread power outages and leaving at least one person dead.

Tens of thousands of homes in Washington state lost power Tuesday and downed wires or trees locked some highways as Northern California and the Pacific Northwest started feeling the effects of a powerful atmospheric river event,

A powerful bomb cyclone is taking aim at the Pacific Northwest and northern California with hurricane force winds forecast to gust up to 70 mph with as much as 15 inches of rain and heavy snow in the mountains.