It does look more certain that we'll be seeing some sort of cold wave later next week. An area of lift spreading into the Alaskan interior will be laying down quite a bit of fresh snow cover around midweek, and depending on the clearing we may see substantial radiational cooling and probably the production of a large arctic air mass. The GFS builds a large *1060 mb high* over northwest Canada towards the 240 hour panels, and so does the ECMWF. Given that there are consistent signals of troughiness ahead of the upper ridge, this already looks to be more of a cloudy/snowy arctic outbreak than a dry & fair one. And really that's about all that can be said at this point.
It's pointless to do much speculation right now, but it will be something to keep an eye on once we get past the holidays.