North Dakota Department of Transportation issued the following announcement.
INTERSTATE CLOSURE I-94 from the Montana border to Mandan is currently closed. Montana officials have also closed the portion of the interstate from the North Dakota border to Glendive, MT.
Please do not risk your life and the life of first responders by attempting to use GPS to access secondary roads. They are likely to become impassable due to the significant snowfall and high winds.
For more information, read the news release here: https://www.dot.nd.gov/dotnet/news/Public/View/9182
Original source can be found here.