Potomac River - Gum Bar Point UV IndexUnited StatesVAWestmoreland CountyPotomac River - Gum Bar Point1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAPotomac River - Gum Bar Point UV forecast issued yesterday at 2:17 pm. Next forecast at approx. 2:17 pm.Get WillyWeather+ to remove ads