A WIND CHILL WARNING in effect tonight through Saturday for the following counties: Flathead, Sanders, Lake, Lincoln, Missoula, Mineral, Ravalli, Granite, Powell, Deer Lodge, and Silver Bow. Strong winds above 20 mph may push wind chill values between -20 and -30 degrees during nighttime hours.
LAKE EFFECT SNOW ADVISORY until 11 am Friday from Polson along the entire eastern shore of Flathead lake; Polson to Bigfork. With windy conditions expected overnight, visibility will be reduced to less than half a mile. Six to 10 inches of snow are possible in isolated locations in the advisory area.
Cold like this hasn't occurred since February 2011! This could be the coldest 10 day stretch in 40 years. With these cold conditions, frostbite and hypothermia will come quickly to people exposed outdoors. Livestock and pets should be moved inside or under shelter from the wind. If you must venture outside, make sure to cover exposed areas and keep extremities warm.
Additional snow is expected across the region as another shot of cold air arrives Friday morning. This will mostly be a mountain event. However, light accumulations are possible in the valleys. The snow will be very dry and powdery, and will primarily pose a visibility risk due to high winds expected over the next couple of days. The best chance of valley snow is in Southwest Montana.
The replenished cold air will make for a very cold weekend before winds shift to bring us moist pacific air from the west. While temperatures will warm above subzero, they will still be well below average. The odds of seeing snow will slowly increase as we go through next week as well.