It may not go sub zero, but will get darn close. Those low temps are generally coupled with strong winds as the cold front comes in, so wind chill will be well below zero. Conditions will be more like February then November, that's for sure. Modest improvement in temps for Saturday-Sunday.
We're only suppose to get a couple of inches of snow today/tomorrow but there will be significantly more at higher elevations. The sun came out and the summits cleared for a little bit yesterday, just enough to see there is a lot of snow up there! First time I've seen that bright light in the sky in at least 10 days. Living in the shadow of Mt Adams does have its down side. Don't get to see the sun very often in the winter.