From Portland, your best jetty bet is always going to be Barview at Tillamook Bay. Go toss jigs or bait. With it being stormy, I'd stay further inside (the jetty is very long, and there will be fish the length of it). Take 101 north from Tillamook, and take a left at the Barview Store.
Do a forum search for more info on techniques and whatnot. There might even be a member here who might work at a sporting goods store that might set you up pretty well.