Forecast Snowfall through Monday Afternoon National Weather Service Riverton WY 101 PM MST Fri Dec 1 2017 ...Significant snowstorm expected for parts of Western Wyoming later Saturday night through Sunday night and over into parts of Central Wyoming Sunday night and Monday Morning... .A cold storm system over the southern Gulf of Alaska will dive southeast towards the area this weekend. Snow is expected to become widespread across the northwest mountains Saturday evening and then spread southeast across the area. Snow, possibly heavy at times, will continue Sunday and into Sunday night. The snow will be accompanied by periods of gusty southwest wind Sunday, shifting to the northwest Sunday evening. Areas of blowing and drifting snow will likely develop. Heavy snow will also be quite possible from Eastern Sweetwater County over to Casper Mountain Sunday night through Monday morning. Star Valley- Including the cities of Afton, Alpine, Star Valley Ranch, and Thayne
101 PM MST Fri Dec 1 2017 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE SATURDAY NIGHT THROUGH LATE SUNDAY NIGHT... * WHAT...Heavy snow possible. Plan on difficult travel conditions. Total snow accumulations of 4 to 6 inches, with localized amounts up to 8 inches, are possible. * WHERE...Star Valley. * WHEN...From late Saturday night through late Sunday night. * ADDITIONAL DETAILS...Significant reductions in visibility are possible. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Watch means there is potential for significant snow, sleet or ice accumulations that may impact travel. Continue to monitor the latest forecasts. The system that will bring the Wyoming snow over the weekend is approaching Pacific Northwest late Friday as noted in this water vapor movie.