Air Quality Information

                                                        


Regional Pollen Information     


 
 
 


National UV Forecast

 
 
         About this map:
Ultraviolet radiation (UV) comes naturally from the sun.
Solar UV radiation levels are highest during the middle of the day. In total, almost half the daytime total UV radiation is received during the few hours around noontime. Clouds, as well as ozone, have a tremendous affect on UV radiation levels. However, cloudy skies generally do not offer significant protection from UV. Thin or scattered clouds can have minor impacts on UV and even, for a short time, increase UV above what it would be on a blue sky day by further scattering the radiation and increasing the levels that reach the surface.
All UV radiation can be damaging so it is important to know the level of ultraviolet radiation in your area.
 




National Flu Information

 
 
           About this map:
Influenza is a viral infection that is easily transmitted between human beings.
Use this map to track active influenza data in your local area and to help determine  when precautions should be taken.




National Ozone Air Quality Information

 
 
         About this map:
Ozone is a gas composed of three atoms of oxygen. Ozone occurs both in the Earth's upper 
atmosphere and at ground level. 
Ozone can be good or bad, depending on where it is found; Good ozone occurs naturally in the upper atmosphere, 6 to 30 miles above the Earth's surface, where it forms a protective layer that shields us from the sun's harmful ultraviolet rays. This beneficial ozone is gradually being destroyed by manmade chemicals. When the protective ozone "layer" has been significantly depleted; for example, over the North or South pole; it is sometimes called a "hole in the ozone."
In the Earth's lower atmosphere, near ground level, ozone is formed when pollutants emitted by cars, power plants, industrial boilers, refineries, chemical plants, and other sources chemically react in the presence of sunlight. 
Ozone at ground level is a harmful air pollutant.
Although our world contains many types of pollutants, ozone can cause many problems when at
unsafe levels.
Use this map to track ozone levels in your area.
 



 
 
 
 
Weather Fast Fact
 
 
 

BAROMETRIC PRESSURE:

The air that makes up our atmosphere exerts a pressure on the surface of the earth. This pressure is known as atmospheric pressure. Generally, the more air above an area, the higher the atmospheric pressure. Barometric pressure changes with local weather conditions, making barometric pressure an important and useful weather forecasting tool. High pressure zones are generally associated with fair weather, while low pressure zones are generally associated with poor weather. For forecasting purposes, the absolute barometric pressure value is generally less important than the change in barometric pressure. In general, rising pressure indicates improving weather conditions, while falling pressure indicates deteriorating weather conditions.

 

 

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