I'm retired NWS, worked Denver area weather for many years. Latest computer models are indicating the main threat of snow on Friday, possibly a big storm for Denver with the position of the surface low as shown on the graphic below. Still too early to tell on snow amounts. I could see Saturday as the very cold day after the storm with temps dropping from the teens at kickoff to perhaps single digits after dark. Ironically, it could be similar conditions to what the Broncos faced in the playoff game at New England last January. Brady and Gronk didn't seem to have much trouble with the conditions on that day, nor would I expect Manning & Minnesota boy Decker play to suffer on Saturday.
Valid 5p.m. MST Friday Jan. 11, 2013