Columbia River - Cooper Island Rainfall ForecastUnited StatesORColumbia CountyColumbia River - Cooper IslandToday 18 Apr30%Sat 19 Apr10%Sun 20 Apr65%Mon 21 Apr15%Tue 22 AprNo RainWed 23 AprNo RainThu 24 Apr25%Columbia River - Cooper Island rainfall forecast issued today at 6:05 pm. Next forecast at approx. 8:05 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Portland RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads