Multnomah Channel - Santosh Slough Entrance Rainfall ForecastUnited StatesORColumbia CountyMultnomah Channel - Santosh Slough EntranceToday 19 Apr20%Sun 20 Apr50%Mon 21 Apr10%Tue 22 AprNo RainWed 23 AprNo RainThu 24 Apr20%Fri 25 Apr35%Multnomah Channel - Santosh Slough Entrance rainfall forecast issued today at 6:08 am. Next forecast at approx. 8:08 pm.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