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 today at 3:18 pm. Next forecast at approx. 3:18 pm.Get WillyWeather+ to remove ads