Flood Watch National Weather Service Riverton WY 211 AM MDT Sat Mar 18 2017 ...Significant low elevation snowmelt today through Sunday night will cause flooding in the western valleys... .Temperatures in the 50s are expected across Jackson Hole and Star Valley on Saturday. Low temperatures on Sunday are forecasted to be in the middle 30s to near 40 degrees. Strong southerly winds at 15 to 30 mph are also expected across the western valleys Saturday afternoon through early Sunday morning. Expect rain in the western valleys to start later night and last through Sunday afternoon.Jackson Hole-Star Valley-South Lincoln County- Including the cities of Jackson, Afton, Alpine, Star Valley Ranch, Thayne, Kemmerer, and Cokeville 211 AM MDT Sat Mar 18 2017 ...FLOOD WATCH NOW IN EFFECT FROM NOON MDT TODAY THROUGH LATE SUNDAY NIGHT... The Flood Watch is now in effect for * Portions of northwest Wyoming, southwest Wyoming, and west central Wyoming, including the following areas, in northwest Wyoming, Jackson Hole. In southwest Wyoming, South Lincoln County. In west central Wyoming, Star Valley. * From noon MDT today through late Sunday night * The warmer valley temperatures, strong southerly winds, and rain on a ripe and melting snowpack forecasted for the weekend will cause significant low elevation snowmelt runoff. * Flooding of smaller streams, culverts, and other low lying areas is expected to be the greatest by Sunday afternoon as snowmelt runoff will be peaking at that time. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Flood Watch means there is a potential for flooding based on current forecasts. People living in flood prone areas across the western valleys should begin preparing for rising water across low lying areas such as drainage ditches, bridges, and basements. You should monitor later forecasts and be alert for possible Flood Warnings.