Windchill warnings now up for my area, with windchills below -20°F.

Chilly daytime temperatures, periods of light snow showers (with heavier snow over the mountains), and windy conditions acorss the wind-prone corridors of southeast Wyoming. BUT the main story is the cold. A series of reinforcing cold shots will bring already chilly daytime temperatures down to frigid next week, with morning wind chill temperatures far below zero. By mid-next week through the end of the week, expect wind chills to be anywhere from zero to 25 below! Please make necessary preparations to protect your livestock!

Cheyenne NWS Situation Report

The link opens charts of the windchill through Friday. Short answer, it sux to live here. Windchills will drop each day into the minus teens or twenties.

We have a warming trend (the temps will get up to +16°F Tuesday, though the windchill stays down below -10°). Then the temperature plunges even colder than it was, predicted to go to -19°F on Saturday night.

forecast.weather.gov