Near whiteout conditions are expected in higher elevations are expected at times. Snow levels will dip to around 2000' on Saturday and will continue to drop to around 1500' on Sunday.
We'll be mostly dry for the early portion of your Friday, but wet weather is returning to Northern California today.
Snow and cold are also forecast for interior OR and Washington as well as for much of northern California, the National Weather Service said.
Earlier this week, Seattle was hit by the first snowstorm, with 2.7 inches blanketing the region - up from the 0.7 inches on average for February.
A snowstorm earlier this week brought nearly 3 inches to the area and forecasters expect a third next week. The NWS advises drivers to take caution if they have to be out on the roads. By early morning, 80 were already canceled.
Total snow accumulations of 4 to 6 inches are expected in the interior lowland areas including Seattle, Everett, Tacoma, Bremerton, Bellevue, North Bend, Redmond and Kent.
The snow is expected to fall at a rate of about two inches per hour at the worst parts of the storm.
A 2017 snowstorm made travel hard in Portland.
Meteorologist Cliff Mass called the storm "one of the greatest snow events in decades" for Seattle, and said the snow would begin falling Friday afternoon and last into Saturday.
The winds expected to accompany the storm could cause issues with blowing snow, as well as downed power lines and trees.
Marquise Lyons, left, and stepfather Curtis Black make their way down a closed snow-covered residential street January 18, 2012, in the West Seattle neighborhood of Seattle, Washington.
The University of Washington in Seattle said it is suspending operations at 12:30 p.m. (3:30 p.m. ET) Friday and all day Saturday.