Cold arctic air and snow heading to Wyoming
Will hit Wyoming Tuesday night and Wednesday
by National Weather Service
January 4, 2010
Very cold arctic air will move into far northern Wyoming late Tuesday afternoon and spread south through Tuesday night and Wednesday. Along with the cold air, snow will spread across western and northern Wyoming late Tuesday afternoon. The snow will spread south through Tuesday night and be widespread on Wednesday. The only area that should not see significant snowfall is Sublette County.
The western and northern mountains will see the possibility for 6 to 12 inches of snow, with some of the higher mountains potentially receiving up to 15 inches Tuesday through Wednesday. Snowfall accumulations across the lower elevations of northern and central Wyoming may 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, around Cody, Thermopolis, Buffalo, 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 winds could produce wind chills of 20 to 25 below zero in the Big Horn Basin, eastern Johnson and Natrona counties. Temperatures by Wednesday night should fall to 10 below to 20 below zero with local areas falling to 25 below zero in the north and western valleys and basins.
Travel and outdoor activity will be significantly impacted by this arctic storm system starting Tuesday afternoon in the north and west becoming widespread through Wednesday and Wednesday evening.
FOR: Yellowstone National Park Absaroka Mountains Cody Foothills North Big Horn Basin Southwest Big Horn Basin Southeast Big Horn Basin Owl Creek and Bridger Mountains Bighorn Mountains West Bighorn Mountains Southeast Northeast Johnson County Southeast Johnson County Teton and Gros Ventre Mountains Jackson Hole Wind River Mountains West Wind River Mountains East Upper Wind River Basin Wind River Basin Lander Foothills Green Mountains and Rattlesnake Range Natrona County Lower Elevations Casper Mountain Star Valley Salt River and Wyoming Ranges Upper Green River Basin Foothills Upper Green River Basin South Lincoln County Rock Springs and Green River Flaming Gorge East Sweetwater County
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