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.

A powerful storm was clobbering Washington state on Wednesday, knocking out power to hundreds of thousands while wreaking havoc on road travel and causing at least one death and two injuries.