The National Weather Service warned of hazardous travel on snowy mountain passes and ice on some highways when snow initially melts and then freezes as road temperatures drop.
The snow was then forecast to spread across northern Idaho, Montana, northwestern Wyoming and North Dakota into Friday.
Some higher elevations in the northern Rockies could see snow totals of 2 feet (61 centimeters) or more.
Central Montana will see the worst of the snow, said Matt Ludwig, a meteorologist with the National Weather Service in Great Falls.
Northwestern Wyoming, including Yellowstone National Park, was also under a winter storm warning, the National Weather Service said.
Persons:
HELENA, — Snow, Matt Ludwig, ”, Ludwig, aren’t, Snow, Payton Lester, Joe Spieker, Helena, Ludwig said, that's, ” Ludwig, Nathan Heinert, Heinert, Bismarck
Organizations:
Rockies, National Weather Service, Helena Public Schools, Eagle Tire, Helena, Watford City
Locations:
Mont, Washington, Idaho , Montana, Wyoming, North Dakota, Canada, Cascade, Montana, Central Montana, Great Falls, Helena, Northwestern Wyoming, Yellowstone, Alberta, Bismarck, Williston, Watford, Minot, North