you just happened to travel thru the Seattle - Portland corridor during one heck of a on-shore storm. A real biggie to kick off the "storm" season that hits in November. Usually November is rougher weather than December. 100 mph wind gusts in the ridges of the Cascades... tons of rain. Lots of downed trees and power outages.
You got lucky. Several people were killed by trees falling on them on the wast side of the Cascades. Stevens Pass was closed for a bit... had to take some tree off someone's car and deal with a body.
On the east side... hwy 20 was closed for the season since going over Washington Pass was not possible. Mazama/Winthrop/Twist were without power from downed trees due to wind and snow. They got over 2 feet of snow in less than 24 hours.
Spokane was nailed, too. 70 mph winds. Downed trees. Power out.
Hwy 90 was closed between George and Vantage due to high winds.
I had to be in Portland for a medical appt yesterday and watched the trees going back and forth from inside the building. Dreaded the drive home. Roads were solid in every direction by 3pm on I-205.
I'm not sure which route you were going to take in that weather that would have been better. It was not a good idea to be on any road in the NW yesterday.
Governor declares state of emergency http://mynorthwest.com/174/2851067/Governor-declares-state-of-emergency-after-Northwest-storm