Potomac River - Whites Neck Point UV IndexUnited StatesMDSt Marys CountyPotomac River - Whites Neck Point1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAPotomac River - Whites Neck Point UV forecast issued yesterday at 3:17 pm. Next forecast at approx. 3:17 pm.Get WillyWeather+ to remove ads