As of 10:30 a.m. today (Thursday), Interstate 90 remains closed between North Bend and Ellensburg, and Stevens Pass is closed, both because of heavy snowfall.
Holiday travelers crossing the Cascades to meet family and friends are either blocked, stranded, or face a long detour via White Pass (chains required) or the Columbia Gorge.
My in-laws got stuck in the mess driving from Spokane and spent last night in Ellensburg. Right now they're pondering limited options, the most likely being a retreat home to Spokane and no family Christmas gathering.
The Washington State Dept. of Transportation (WSDOT) said more than 110 inches of mountain snow has fallen over the past seven days, according to this Seattle Times article.
Heavy Cascades snowfall is predicted through this evening, and lowland snow remains a possibility in Seattle for Christmas Day.
Use extreme caution if you're traveling and be fully prepared for winter driving.