"With the wind, certain areas could see minus 6 degrees as we go into the night and in some places wind-chill values could get even colder, dropping to the 15- to 20-below range."

Wednesday will bring better travel conditions for anyone driving out of Missoula, although the corridor from Bozeman to Billings will still have stormy weather, Nickless aid.

As for post Thanksgiving Day travel, Friday looks relatively clear but western Montana will likely get hit with another snowstorm on Saturday.

Anyone heading out on the roads this week are encouraged to take some extra precautions, said Trooper Andrew Novak with the Montana Highway Patrol.

"Good stuff that's important to have along: a cell phone, and emergency flares or reflective triangles - some kind of warning system that lets other traffic know where you are if you are stuck in a snowbank or you are in a collision," Novak said.

"It's important to have those things to alert people that you are there, particularly when it's dark out or you are in really bad weather and visibility isn't very good."

Extra water, flashlights, batteries and food are always good things to take the time to pack, Novak said.