The National Weather Service has issued various winter weather watches, warnings, and advisories concerning an ongoing winter storm. Click here to view our most recent Winter Weather Message and click here for the latest snowfall totals to keep up-to-date with the development, intensity, and impacts associated with this storm.
Very cold Arctic air over northern Wyoming this Tuesday evening will move south into central Wyoming late tonight, and into southwest Wyoming on Wednesday.
Snowfall accumulations over the far western Wyoming mountains will be between 6 and 12 inches, with 10 to 15 inches with isolated higher amounts near 18 inches over the Tetons. Over the far western Valleys...3 to 6 inches has fallen through Tuesday evening...with an additional 2 to 4 inches expected through midday on Wednesday.
Snowfall accumulations across the lower elevations of northern and central Wyoming will be quite varied. Most locations in the Big Horn and Wind River basins, as well as Johnson and Natrona counties have the potential for 2 to 5 inches of snowfall. Along the foothills, including the towns of Casper and Lander, snowfall of 5 to 8 inches will be possible. Southwest Wyoming could see 1 to 3 inches of snow.
Temperatures will fall below zero behind the Arctic cold front. Brisk north wind could produce wind chill reading of 20 below to 25 below zeron in the Big Horn Basin, Natrona County, and eastern Johnson County. Temperatures by Wednesday night should fall to 10 below to 20 below zero with localized readings around 25 below zero in the northern and western valleys and basins.
Travel and outdoor activity will be significantly impacted by this Arctic storm system beginning Tuesday afternoon in the north and west. Other locations can expect travel and activity to be severely impacted by Wednesday, continuing through Wednesday evening.