U.S. Highway 191 was closed Saturday afternoon from Harlowton to Eddie's Corner due to "zero visibility" caused by high winds blowing snow, according to an announcement from the Montana Department of Transportation.
Snow in the area was blowing and drifting, according to MDT, which announced the closure shortly before 3 p.m.
Earlier in the day the road had been closed from Garneill to Eddie's Corner.
Conditions on Montana Highway 3 from Harlowton to Shawmut were designated "severe" at about 3:20 p.m. If road conditions are evaluated to be worse than severe, MDT will close down a roadway.