A powerful atmospheric river is slamming into Northern California and is expected to persist for days. Its effects, coupled with a bomb cyclone offshore, are being felt across the Pacific Northwest.

A bomb cyclone and an atmospheric river will continue lashing the Pacific Northwest with severe weather conditions, the National Weather Service said.

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