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

A "bomb cyclone" is forecast to bring heavy snow, high winds and life-threatening flooding to the Pacific Northwest in the next few days.

Airports from Northern California to Seattle braced for what the National Weather Service described as a "rapidly intensifying surface low" moving toward the region.

What was expected to be one of the strongest storms in the northwest U.S. in decades arrived Tuesday evening, knocking out power and downing trees.

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.

The Pacific Northwest and Northern California are bracing for what is expected to be a powerful storm that potentially could cause power outages and flash floods.

A major storm was sweeping across the northwest U.S., battering the region with strong winds and rain and causing widespread power outages and downed trees that killed at least one person

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

Local officials across the West Coast are bracing for flash floods, power outages, and possible blizzards at high altitudes after announcing heavy rain from Nov. 19 to Nov. 22. Powerful winds also raise concerns about the increased risk of wildfires.

A powerful storm is bearing down on the West Coast and bringing with it a scary-sounding weather term - bomb cyclone. Bomb cyclone is a term used by weather enthusiasts to describe a process that meteorologists usually call bombogenesis.