The State Patrol reported nearly a dozen crashes caused by bad road conditions at Snoqualmie Pass on Sunday afternoon.
Chains were required on all cars unless drivers had all wheel drive. Oversized vehicles were not allowed.
Tire chain requirements caught some drivers off-guard.
"I want to cry," said Tina Johnson. "I just want to go home... never had to do this."
Also on Sunday, freezing rain left a sheet of ice in Whatcom County.
A winter storm warning is in effect for the Cascades until 4 am Monday.
An additional 10 to 20 inches of snow, mainly above the 2500 foot level, is expected.
The Department of Transportation said the heavy snow could mean delays on I-90 for avalanche control work.
The heaviest snow will fall Sunday afternoon through Monday morning.
A freezing rain advisory was issued Sunday for the east Puget Sound lowlands. Up to a quarter inch of ice was reported in North Bend on Sunday afternoon. Current conditions
The snow level is expected to rise to between 3000 and 4000 feet by early Monday.