Robbers Roost Reservoir Rainfall ForecastUnited StatesWYWeston CountyRobbers Roost ReservoirToday 19 AprNo RainSun 20 Apr10%Mon 21 Apr35%Tue 22 Apr10%Wed 23 Apr30%Thu 24 Apr50%Fri 25 Apr35%Robbers Roost Reservoir rainfall forecast issued today at 4:04 pm. Next forecast at approx. 6:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Rapid City RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads