Its such a marginal setup with temps and precip, you are setting yourself up for disappointment if you expect more than a coating- inch. Of course that can still change but it can also change on the dry side too.
I broke it down a bit further and researched winter storms since 2000 in December and this is what I could find for WNC-
In December 2000 there was a 1-3 inch snow for most of the foothills west of 77 and mountains
In December 2002 there was a nice CAD storm with 2-6 inches for most of the foothills and mountains
In December 2003 there were multiple small events/icing events
In December 2005 there were 2 icing events
In December 2009 there was the big snowstorm on December 19
In December 2010 there were a couple small events and the big Christmas snow
In December 2017 there was a big overrunning snow
In December 2018 there was a big snow
In December 2019 there was a light icing event
So thats 9 out of 25 winters with at least small events. There were 4 big snowstorms in that time frame. December has definitely been feast or famine but over the past 25 years it has produced 3 of the 5 biggest snowstorms for WNC.