Potomac River - Powells Creek Entrance UV IndexUnited StatesVAPrince William CountyPotomac River - Powells Creek Entrance1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAPotomac River - Powells Creek Entrance UV forecast issued yesterday at 2:17 pm. Next forecast at approx. 2:17 pm.Get WillyWeather+ to remove ads