The wait continues, but I like the sound of this from WPC. I also like artic air incursions to be focused to our west a bit at this time of the year, perhaps that leaves room for amplification and Miller Bs for us. And if there s blocking to our NE then does that not also slow the flow and ensure a source of cold air?
A trend is becoming evident among the guidance that a rather
significant pattern change could begin to unfold toward the latter
portion of the medium range and beyond. Model/ensemble solutions
continue to trend stronger with the upper ridge across western
North America by the middle of next week, while a downstream upper
vortex deepens north of Hudson Bay, setting up broad
north-northwesterly flow from the Arctic into central Canada.
Farther south across the CONUS, the flow appears to remain
progressive, originating in the North Pacific, which should limit
the southward intrusion of arctic air into the CONUS for now.
Nonetheless, would expect an area of arctic air to begin pooling
across central Canada by the middle of next week, with the
potential for incursions southward, especially into the
Midwest/Great Lakes.