It's still very early, and there are lots of different scenarios that could potentially play out in the end... but the GFS has recently been flirting with the idea that a chunk of energy from former typhoon Chaba will cross the Pacific, arriving just south of the 40N, 140W benchmark by day 7 (on the heels of another moderately strong extratropical cyclone further north). Developing/bombing storms south of this benchmark are much more likely to make landfall on the Washington or south Vancouver Island coast, bringing the potential for a windstorm to the big cities of the Pac NW.
As of now, dynamics look favorable for a strengthening system and minor/moderate windstorm for Seattle/Portland. However, 850mb baroclinicity and jet strength, while indicative of a strengthening storm, are, at face value, not enough for a true major bomb a la Dec 1995 or Oct 1962. But it has certainly piqued my interest, and I'll be tracking this one closely until the models drop it.
Ya, the idea of a typhoon-induced windstorm seems to be all but gone from the models now. Alas!
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