As the high pressure ridge moves ashore winds are out of the north. Along the coast they are quite stiff and probably accounts for the paucity of coastal returns on the Gray’s Harbor (KLGX) radar last night. But inland, the winds are light and the I5 corridor was lit up as the flight north continues.
Pacific Northwest Radar: (Click on the links below to open the .gif files in a new window)
Here is the grand view of the winds aloft from Earth:
Here is Paul’s archived National Radar Composite from yesterday. Look at the wind map, and then the radar.
And here are the weather maps (click on any image to bring up a full gallery view)