Potomac River - Four Mile Run Entrance Wind ForecastUnited StatesVACity of AlexandriaPotomac River - Four Mile Run Entrance1-Day3-Day5-Day Graph Plots Open in Graphs Wind Forecast NOAAWind Real-Time Potomac River - Four Mile Run Entrance wind forecast issued today at 4:29 pm. Next forecast at approx. 4:29 am.Get WillyWeather+ to remove ads