Potomac River - Four Mile Run Entrance Rainfall ForecastUnited StatesVACity of AlexandriaPotomac River - Four Mile Run EntranceToday 16 Apr5%Thu 17 AprNo RainFri 18 AprNo RainSat 19 Apr10%Sun 20 Apr10%Mon 21 Apr20%Tue 22 Apr40%Potomac River - Four Mile Run Entrance rainfall forecast issued today at 6:04 pm. Next forecast at approx. 8:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Sterling RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads