Here is the forecast of tornadoes and severe thunderstorms (large hail and/or damaging winds) fro 6am Monday to 6am Tuesday.
Here is the forecast winterized radar (courtesy: Dr Ryan Maue) for 6pm Monday evening. The deep blues are falling snow.
And, here is the forecast radar at 6am Tuesday.
Here is a preliminary look at snow accumulations. There is a serious possibility of more than a foot of snow falling along I-70 and I-76 between Denver and Colby and Denver and North Platte, respectively.