The Montana Department of Transportation reports that Monida Pass on Interstate 15 is closed.
All southbound traffic was being detoured off of I-15 at the Barrett's interchange south of Dillon.
The Idaho Transportation Department reported that the northbound lanes of I-15 were closed between exit 167 and the Montana state line.
IDT reports drifting snow on the roadway forced the closure.
MDT also reports that Raynold and Targhee passes are closed due to severe driving conditions in Eastern Idaho.
IDT reports that US Highway 20 is closed from Ashton to the Montana state line.