Several of you have commented on the potential for a transition to much colder air over the weekend. I have held off talking about it until we were close enough, but now it seems clear we will move to much colder air overhead later on Saturday. By Monday will be deep in moderated arctic air (see forecast output for 4 AM Monday). Blue indicates air cold enough for snow.
By Sunday AM we will be cold enough aloft for snow..but there is a real question on how much precipitation will be around. The latest runs only indicate light snow south of Seattle. The current forecast configuration does not look amenable to a significant snowfall. I will update much more on this tomorrow.
