A developing storm system forecast to swing off the Oregon and Washington coastline on Friday will add to the region's weather woes.

Forecasters said a final round of rain, snow and high winds were targeting the Pacific Northwest and Northern California regions on Friday.

A bomb cyclone slammed the Pacific Northwest and Canada's British Columbia on Tuesday night into Wednesday morning, killing at least two people and knocking out power to more than half-a-million homes and businesses.

A powerful storm called a bomb cyclone downed trees in parts of the Pacific Northwest on Tuesday. It later combined with another storm, called an atmospheric river, causing flooding and further damage.

In northern California, flood and high wind watches were in effect, with up to 8 inches (20 centimeters) of rain predicted for parts of the San Francisco Bay Area, North Coast and Sacramento Valley.

A powerful atmospheric river is unleashing torrential, flooding rainfall across Northern California and parts of the Pacific Northwest in the wake of a historically strong bomb cyclone — and another storm is on the way.

At least two people have died after a bomb cyclone slammed into the Pacific Northwest, snapping tree limbs and damaging homes and roads around Seattle. In northern California, a second powerful system,