Winter Storm in Casper Mountain, Wyoming

Snowfall of 12 to 18 inches was measured on Casper Mountain.

A slow-moving storm system moved out of Utah and across southern Wyoming producing a period of heavy snow on Christmas Day. Low-to-mid level wind flow was from the northeast and favored upslope conditions across Hot Springs, Fremont, and Natrona counties. Snow totals ranged from 7 to 13 inches in these areas. The northern portions of both the Jackson and Star valleys reported snowfall of around one foot. The highest amounts of one to two feet fell in the foothills of the Wind River Range near Lander and on Casper Mountain. The same cold front that produced the favorable upslope flow also brought gusty northeast winds to the basins east of the Continental Divide beginning early Christmas morning. Northeast wind of 20 to 30 mph was common. The strongest wind was in Sweetwater County where sustained speeds of 30 to 40 mph and gusts to 51 mph combined with the snow to produce treacherous driving conditions on Interstate 80.