Avoid outside activities if possible. When outside, make sure you wear appropriate clothing, a hat, and gloves.

WIND CHILL WARNING REMAINS IN EFFECT UNTIL 5 PM MST SUNDAY... * WHAT...Dangerously cold wind chills. Wind chills as low as 65 below zero. * WHERE...The Montana Hi-Line adjacent to the Rocky Mountain Front, Eastern Toole and Liberty Counties, and Southern Rocky Mountain Front. * WHEN...Until 5 PM MST Sunday. * IMPACTS...Wind chill values are at extremely dangerous levels. The dangerously cold wind chills could cause frostbite on exposed skin in as little as 5 minutes. * ADDITIONAL DETAILS...The period of coldest, and most extreme, wind chills are expected through this morning.