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http://www.epa.gov/sunwise/uvindex.html
UV Index
The ozone layer shields the Earth from harmful UV radiation. Ozone
depletion, as well as seasonal and weather variations, cause different
amounts of UV radiation to reach the Earth at any given time. Developed by
the National Weather Service (NWS) and EPA, the UV Index predicts the next
day's ultraviolet radiation levels on a 1-11+ scale, helping people
determine appropriate sun-protective behaviors.
EPA will issue a UV Alert when the level of solar UV radiation is
predicted to be unusually high, and consequently the risk of overexposure
is greater.
Today's UV Index
The UV Index is calculated daily. Enter your zip code or city and
state below for today's UV Index in your area. (Not available for Alaska
and Hawaii.) If a UV Alert is in effect for your area, that information is
included with the UV Index.
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Sign up to receive UV Alerts by e-mail.
ZIP Code:
OR
City Name:
And
State:
You can also look up UV Index using the following resources.
* UV Alert Map Exit EPA disclaimer - Areas in the U.S. where predicted
UV intensity will be well above normal, and you will need to be especially
careful to avoid over-exposure.
* Contour Map - Forecast UV Index values for the U.S. shown as
contours (areas having a particular value) on a map.
* Cities Map - Forecast UV Index values for 58 U.S. cities, shown on a
map.
* Text Bulletin Exit EPA disclaimer - A plain text listing of forecast
UV Index values for 58 U.S. cities
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