National Weather Service Riverton WY 312 PM MST Sun Dec 30 2018 ...Strong winter storm to bring snow, cold, and wind Sunday night into Monday... .Periods of moderate to heavy snow are likely to continue through sunset Sunday before slowly diminishing Sunday evening across far west Wyoming. The snow will spread east of the Continental Divide Sunday evening and overnight. Windy conditions will create hazardous travel conditions for much of the area east of the Divide Sunday night. Bitter cold wind chill temperatures will also occur across central Wyoming Sunday night and Monday morning. Very cold temperatures will be over the area Monday night into Tuesday. Star Valley-Salt River and Wyoming Ranges- Including the cities of Afton, Alpine, Star Valley Ranch, Thayne, and Fossil Butte National Monument 312 PM MST Sun Dec 30 2018 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 9 PM MST THIS EVENING... * WHAT...Moderate to heavy snow. The north end of the Star Valley can expect an additional 1 to 3 inches with an additional inch or so across the south end of the valley. Total snowfall will range from 6 to 10 inches in the north, with 3 to 6 inches in the south. Local totals of 10 to 14 inches expected around Alpine. Additional mountain snowfall will range from 3 to 6 inches. * WHERE...Star Valley and Salt River and Wyoming Ranges. * WHEN...Until 9 PM MST Sunday evening. * ADDITIONAL DETAILS...Plan on snowpacked and icy roads. Patchy blowing snow could significantly reduce visibility.