National Weather Service Riverton WY 242 AM MST Wed Nov 21 2018 ...A Major Winter Storm to impact western Wyoming for the holiday weekend... .A strong winter storm will impact western portions of Wyoming Friday and Saturday. This storm is expected to produce significant snowfall, especially Friday night. Jackson Hole-Star Valley- Including the cities of Jackson, Afton, Alpine, Star Valley Ranch, and Thayne 242 AM MST Wed Nov 21 2018 ...WINTER STORM WATCH IN EFFECT FROM LATE THURSDAY NIGHT THROUGH SATURDAY MORNING... * WHAT...Heavy snow possible. Total snow accumulations of 8 to 12 inches possible. * WHERE...Jackson Hole and Star Valley. * WHEN...From early Friday morning through Saturday morning. * ADDITIONAL DETAILS...Travel could be very difficult to impossible. The hazardous conditions could impact the morning and evening commutes. 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. Following are the official NWS probabilities of snowfall accumulations through Saturday morning.
Much of region will experience snowfall beginning Thanksgiving Day and continuing into Saturday. The heaviest from 1-2 feet is most likely in the western Wyoming mountains.
The above forecasts are heavily based on the computer models snow forecast accumulations for the same time period.