The main band will not be gone for another 9 hours. The back edge(30 miles offshore) after which you have weaker stuff will almost certainly fill in once it's onshore.
South sound is going off. Also UW roof dropped 3 degrees in 3 minutes, down to 37 and DP went up by 1. Could start snowing in 30 minutes after first returns are over us. http://www.atmos.washington.edu/weather/roofplot.php
http://www.tripcheck.com/RoadCams/cams/Hood%20River%20Exit%2064a_pid1863.JPG?1391872483 Anyway here's a hood river webcam to show everyone what a proper snowstorm looks like. ODOT seems to be on top of their game, two actual clear lanes.