This stubborn arctic air mass will slowly begin to exit the state today, allowing one more day of very chilly high temperatures.  Winds increase, as this air mass exits, and this will create many areas of blowing snow and bitter cold wind chills.  Blowing snow will be of significant concern between Cheyenne and Laramie and across other open areas of southeast Wyoming.  In that region, expect very low visibility and ground-blizzard conditions.  Winds will be strongest this afternoon and into tomorrow morning, with some gusting between 50 and 60 mph, especially in the more wind-prone areas.  Winds will be cross-winds across I-25, so travelers should use extra caution if driving light and high profile vehicles.  No major precipitation is in the forecast this week, and temperatures will finally start to moderate by tomorrow and Thursday.