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HOME > Stratosphere Home > Stratosphere UV Index > UV Index: Information     What is the UV Index? What is the nature of UV radiation? How does UV radiation vary throughout the day? How do clouds, elevation, surface type (albedo) and aerosols (haze) affect UV radiation? How is the UV Index determined? What cities does the NWS forecast the UV Index for? How to make use of the UV Index Information. Is the UV Index validated? NOAA/ National Weather Service NOAA Center for Weather and Climate Prediction Climate Prediction Center 5830 University Research Court College Park, Maryland 20740 Page Author: Climate Prediction Center Internet Team Disclaimer Information Quality Credits Glossary Privacy Policy Freedom of Information Act (FOIA) About Us Career Opportunities