There are a few parked around Paine Field (Everett) - maybe a dozen or so. Most are parked around Boeing Field (a few car parking lots have been used), and Moses Lake in central Washington. Moses Lake is normally quite dry so not a bad place for extended storage (although not as good as the desert Southwest US). Others have been headed south to more common aircraft storage areas (e.g. Victorville) as they've run out of room in Washington state.