It's starting to look cold enough for snow all the way down to sea level in the PacNW by Sunday night. The models agree on that, but the big question is moisture.
This is one model projection (GFS) of snowfall Sunday night into Monday. You should take these numbers with a grain of salt, because it's way too far out to get specific. But the point is: the odds of snow - even over lower elevations - are going up next weekend.