A White Christmas?

As of this evening, this is the forecast for Christmas Day:

I even used Celsius for your convenience.  So, about a 50% chance of snow.  But I don't really care about whether I have a White Christmas or not, it's the forecast for the week after that has me really worried:

Of course a lot could change between now and then, but it is quite clear that we are about to get some incredibly cold temperatures.  Possibly record-breaking cold temperatures in certain areas.  Which would be the perfect ending for a year where we've already broken various records including snowiest day, rainiest day, highest temperature, streak of dry days, wettest autumn.  Climate change deniers can suck on it.