I agree, C.While I concur with all those who don't subscribe to the all the 'cold, warm, wet, dry or windy' Autumns means Yamkinesque amounts of snow, come January schools-of-thought, ubiquitous deep snow in Siberia ought to lead to the development of deeper, colder air masses...Which would (even based on first principles of thermodynamics?) in the event of ideal synoptics, allow for more-severe spells of cold weather.
That said, however cold the air over Siberia may become, there's never any guarantee that it'll necessarily find its way over here...