Sensible weather wise -- no changes from my initial post on Nov. 23 which postulated the retraction/reset period in Dec 10th-16th, and thereupon, rearrangement of features with a rapidly improving hemispheric regime shortly after the mid month point +/- three days. I maintain that notion. The week period of December 12th-18th will likely feature warmer than normal temperatures; however, heights should neutralize in the East by the 17th-18th already, with normalizing temperatures. The retrogression of the GOAK trough will be occurring concomitantly in the December 14th-18th period, and as we approach the 20th, all disparate domains will be increasing in favorability (e.g., PNA, NAM, NAO), such that the final third of December is interesting winter weather wise.
The 9th period remains a distinct threat as well, as originally noted on the 23rd to monitor the 7th-11th period.
As an aside, a displacement event favors North America (compared to Europe) for "winter" weather, and even if the SPV is displaced away from the continent, that does not implicate "all the cold air" will be taken with it. Quite the contrary, actually, as the geopotential height structure would be conducive for tropospheric, high-latitude blocking.