* WHAT…Dangerously cold wind chills as low as 40 below.
* WHERE…Southwestern Montana along and south of Interstate 90,
Meagher County Valleys, and Canyon Ferry Area.
* WHEN…Until 11 AM MST Thursday.
* IMPACTS…The dangerously cold wind chills as low as 40 below zero
could cause frostbite on exposed skin in as little as 10 minutes.