Potomac River - Alexandria Rainfall ForecastUnited StatesVACity of AlexandriaPotomac River - AlexandriaToday 19 Apr5%Sun 20 Apr5%Mon 21 Apr10%Tue 22 Apr30%Wed 23 Apr20%Thu 24 Apr10%Fri 25 Apr30%Potomac River - Alexandria rainfall forecast issued today at 6:04 am. Next forecast at approx. 8:04 pm.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