For our snowstorm, model QPF values are 0.4" to 0.8" for the plains, 1.0"-1.30" for mountains. I am pretty sure that winter storm warnings will be issued for areas of Wyoming, Nebraska, and the Colorado mountains above 9000ft. Northeast Colorado could get a winter weather advisory or possibly even a winter storm warning. Powering up this system, a shortwave trough in a strong northwesterly flow out of northern Canada. You could say that this is an arctic air mass in central Canada. Canada is usually some 25 degrees F warmer at this time of year.