Arctic air is in place over North Central Montana Monday, and it's going to stay there Tuesday as well.
Nearly the whole area is seeing daytime highs that are below zero, and overnight lows will fall as cold as the teens below zero, with some spots close to -20.
Wind chill temperatures by Tuesday morning will range from -20 to -50.
The coldest wind chills are expected in Glacier, Liberty, Pondera, and Toole County, where are Wind Chill Warning is in effect though 5 pm Tuesday.
Frostbite will be possible in as little as 5 minutes on exposed skin.
The rest of North Central Montana is under a Wind Chill Advisory through 5 pm Thursday, with wind chills ranging from -20 to -40 possible.
In those areas, frostbite can occur on exposed skin in as little as 10 minutes.
High temperatures Tuesday will be below zero, with scattered flurries and light and variable winds.
Looking ahead, models are split as to when the arctic air leaves our state.
Some models keep bitter cold around as late as Thursday, while others show warmer temperatures by Wednesday.