How much radiation risk for us in the Pacific NW?
Impossible to say with absolute certainty, but it would take an incredibly unlikely series of events to move any meaningful concentrations of particulate to any part of the west coast. I’m betting against it. You’re much more likely to catch some adverse dose from a TSA scanner or a brick in a building than anything from Japan. Yes, Virginia, bricks are radioactive. Most folks don’t know that.
Impossible to predict currently. We should hope for the best and prepare for the worse.