The latest update of the ECMWF long-range model is quite a change from the previous run, which was not unexpected as the model has been all over the place recently, but also the fact that there is a significant warming event underway in the stratosphere in the far northern latitudes which could eventually (in 10-20 days) translate to a widespread outbreak of cold weather for a large part of southern Canada and into parts of the U.S. as the Arctic and North Atlantic Oscillations go back into the negative phase.
Clearly, the model has trended colder since the last run, but it still likely has even more catching up to do over the next week or two.
In the meantime, many in the east will be able to enjoy a spell of milder weather next week.
Remember, you can also follow my comments on the weather pattern on my twitter page @BrettAWX
My thoughts on the snow through Tuesday in the East and West.
Other than a blast into western Canada next week, most of the Arctic air will remain north of the Arctic Circle into December with just brief intrusions while mild, Pacific air takes hold from west to east.
Still happy with my old snow map.
Accumulating snow this weekend for parts of southern, central and eastern Ontario.
Wild storm in the West through Tuesday. A little snow in the east for the weekend?
The latest clues to the weather pattern over the next several weeks.