Higher pressure will begin to build over the state of Wyoming today, which will keep skies mostly sunny and conditions mainly dry.  Temperatures, however, remain bitterly cold as an arctic air mass remains settled over the region.  Daytime highs today will stay in single digits, with some areas staying below zero.  It will feel even colder than that with most locations seeing wind chill values between -20 to -30 F.  Overnight lows will fall well below zero again tonight.  The arctic air mass that has been settled overhead will slowly be pushed out of the region on Thursday as a weather system approaches the area.  Temperatures will be not as cold, but still remain well below average.  Expect daytime highs in the teens and 20's.  This weather system will also cause clouds to thicken throughout the day.  Light snow will be possible across western and southern Wyoming in the afternoon and evening hours and then develop throughout the rest of the state on Thursday night.  Small, if any, accumulations are expected, but it will be just enough to make roads slick and icy, especially across I-80.  Another arctic cold front approaches the area late Friday into Saturday.