National Weather Service Riverton WY 1037 AM MDT Sat Oct 19 2019 ...Winter Storm Warning and Advisories across much of Western Wyoming Today through Sunday Morning... .A fall storm system will impact western Wyoming today and Sunday with significant snowfall over much of western Wyoming. The heaviest snowfall is expected this afternoon through midnight tonight. Jackson Hole-Star Valley- Including the cities of Jackson, Afton, Alpine, Star Valley Ranch, and Thayne 1037 AM MDT Sat Oct 19 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT SUNDAY... * WHAT...Periods of snow. Total snow accumulations of 3 to 6 inches are expected. The heaviest snowfall is expected this afternoon through midnight tonight. Snow accumulations through late afternoon should be under an inch due to temperatures in the 30s and a warm ground. * WHERE...Jackson Hole and Star Valley. * WHEN...Through noon Sunday. * IMPACTS...Road are expected to become slick and hazardous this evening and remain slick through Sunday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. If you travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. Also make sure your cell phone is charged.