Here is my latest interpretation of the ECMWF weekly long-range forecast output that goes out to the week of Oct. 15-21.
Also, computer models are at odds in regards to a pattern change across North America next week. Overall, it does look much colder for western Canada with the potential for some snow over the Canadian Rockies and even into Calgary during the Tuesday/Wednesday period.
An interpretation of the latest ECMWF weekly long-range forecast output...
Clipper-like storm system will bring light snow to eastern Canada into tonight followed by another round of locally heavy lake-effect snow.
More about the lake-effect snow and upcoming weather pattern.
Arctic invasion will lead to a widespread, major lake-effect snowfall.
Light to moderate snowfall from the storm then an outbreak of heavy lake-effect snow in parts of Ontario as very cold air and strong winds inundate the region Monday night into Wednesday.
Latest forecast model data and teleconnections support the idea that the widespread cold pattern will gradually fade way during the last week of the month.