Columbia River - Multnomah Channel Entrance UV IndexUnited StatesORColumbia CountyColumbia River - Multnomah Channel Entrance1-Day3-Day Graph Plots Open in Graphs UV Forecast NOAAColumbia River - Multnomah Channel Entrance UV forecast issued today at 11:17 am. Next forecast at approx. 11:17 am.Get WillyWeather+ to remove ads