Lots to talk about. For people wanting to travel by car or air in these regions, let's start with the timing.
6am CST Wednesday
Tonight, travel on I-70 and I-40 will be difficult due to heavy snow. It will be snowing in Denver tomorrow morning. A blizzard warning has been issued for much of western Kansas.
6pm CST Wednesday
6am CST Thursday
6pm CST Thursday
How Much Snow?
AccuWeather's forecast looks good to me:
Later today, I'll have an update on the increasingly likely winter storm for Christmas week.