Umpqua River - Koepke Slough UV IndexUnited StatesORDouglas CountyUmpqua River - Koepke Slough1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAUmpqua River - Koepke Slough UV forecast issued yesterday at 12:19 pm. Next forecast at approx. 12:19 pm.Get an account to remove ads