The storm has already dumped more than 15 inches of snow in some parts of the northern Rockies since Sunday, with more to come. Officials have closed sections of I-90 and I-80 in Wyoming, while travel in northern Idaho, western Montana and portions of I-15 is considered hazardous.
Areas as far west as Nevada are expecting heavy snow on Tuesday and Tuesday night, dropping as much as two feet in high-altitude areas of Colorado, a foot in Utah and Wyoming, and six inches east of the Rockies.
Temperatures as low as minus-12 degrees with wind chill and highs hovering around zero degrees could plague parts of North Dakota and Montana, bringing a mass of cold air to the rest of the Plains and Midwest into Friday.
[The Weather Channel]