WHAT...Dangerously cold wind chills. Wind chills as low as 50 below zero.
WHERE...Shoshone, Richfield, Carey, Mud Lake, INL, Craters of the Moon NM, Idaho Falls, Rexburg, St. Anthony, Pocatello, Blackfoot, American Falls, Shelley, Fort Hall, Burley, Rupert, Heyburn, Oakley, Inkom, McCammon, Downey, Lava Hot Springs, Grace, Soda Springs, Henry, Bone, Wayan, Swan Valley, Victor, Ashton, Tetonia, Driggs, Island Park, Kilgore, Dubois, Spencer, Edie School, and Small.
WHEN...Until 10AM MST Tuesday.
IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 5 to 10 minutes.