Chesapeake Bay - Great Wicomico River Light UV IndexUnited StatesVANorthumberland CountyChesapeake Bay - Great Wicomico River Light1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAChesapeake Bay - Great Wicomico River Light UV forecast issued yesterday at 2:18 pm. Next forecast at approx. 2:18 pm.Get WillyWeather+ to remove ads