Downscaled NAM accumulations from 5 PM MST (0000 UTC) this afternoon through 5 PM Christmas Day amount to zilch right on the valley floor, and 4-8 inches in the upper elevations of the central Wasatch.
At the Salt Lake City Airport, all but three members generate less than in inch.
While it won't take a Christmas miracle for there to be an inch or more of new snow on the valley floor by Christmas afternoon, the odds are low. The east bench odds are a bit better, but still most members are under an inch at the University of Utah.
However, the forecasts above are based on science and with a little Christmas magic, perhaps the low probability outcomes will verify. Really, that wouldn't be magic. Statistics says it could be so.