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Washington, Upper Columbia Basin

Air Stagnation Advisory

Statement as of 9:42 AM PST on December 17, 2014

Expires 3:00 PM EST on December 19, 2014


... Air stagnation advisory remains in effect until noon PST
Friday...

* air quality... light winds and stable conditions will increase
the potential for build up of pollutants near the surface.

* Timing... high pressure will persist through Friday morning.

* Impacts... prolonged periods of stagnant air can lock fine
particulate matter close to the ground and degrade air quality.

Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an air mass across the advisory area... pollution has the
potential to increase to dangerous levels. Persons with
respiratory illness should follow their physicians advice for
dealing with high levels of air pollution.




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Virginia - Special Statement
Washington - Dense Fog Advisory , Air Stagnation Advisory, Dense Fog Advisory , Air Stagnation Advisory , Special Statement
Wisconsin - Areal Flood Warning
Wyoming - Dense Fog Advisory , Special Statement
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