Hydrologic Outlook National Weather Service Riverton WY 909 AM MDT Mon Mar 19 2018 ...Increased snowmelt runoff below 7500 feet expected Wednesday afternoon through Friday morning... ...Low lying flooding possible over Star Valley Thursday afternoon through early Saturday morning... Afternoon basin temperatures are expected to warm into the middle to upper 40s Wednesday and Thursday across far western Wyoming. Rainfall up to one half inch is forecasted Thursday afternoon and evening. Snow levels are expected to rise to near 8000 feet by Thursday afternoon--then drop below 7500 feet by Friday afternoon. Expect noticeable increases in snowmelt runoff below 7500 feet Wednesday afternoon through Friday morning. Rain on snowmelt along Star Valley will cause noticeable rises along small creeks and streams Thursday afternoon through Saturday morning. Minor flooding is possible along low lying areas. Residents living along small creeks and streams should be vigilant for significant rises in water levels Thursday and Friday. Road crossings along low lying areas may become hazardous due to rising waters. Snowmelt runoff is also expected to increase Wednesday afternoon through Saturday morning across the Greys River Basin to include the Porcupine Slide area.