Columbia uv index
About the UV Index: The National Weather Service works with the Environmental Protection Agency, to forecast the Ultraviolet (UV) Index for the U.S. The UV index is a measure to help you determine the effects of the sun on outdoor activities. It is computed using forecast ozone levels, cloudiness, and elevation. United States UV Index updated daily. Detailed UV forecast charts, with today's ultraviolet radiation in real-time Everyday the National Weather Service predicts the next day UV index forecast, this index can help you make choices to protect yourself from potentially harmful sun rays.The UV Index Scale is a scale from 0 to 15, with 0 being the lowest risk and 15 being the highest risk.