AIR STAGNATION ADVISORY
Warning Issue Date: 1015 PM PST WED DEC 23 2009
...AIR STAGNATION ADVISORY REMAINS IN EFFECT FROM 4 AM THURSDAY
TO 4 PM PST SATURDAY...
AN AIR STAGNATION ADVISORY REMAINS IN EFFECT FROM 4 AM THURSDAY
TO 4 PM PST SATURDAY.
* AIR QUALITY WILL DETERIORATE IN VALLEYS AND BASINS DUE TO HIGH
PRESSURE LIMITING AIR MOVEMENT. THIS WILL CAUSE THE ACCUMULATION
OF PARTICULATE MATTER IN VALLEYS AND BASINS BELOW 3500 FEET.
* POOR AIR QUALITY WILL AFFECT PERSONS WITH RESPIRATORY PROBLEMS
AND PERSONS ENGAGED IN STRENUOUS OUTDOOR ACTIVITIES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT
OF AN AIR MASS ACROSS THE ADVISORY AREA...POLLUTION WILL
INCREASE. CHECK WITH YOUR LOCAL AIR QUALITY AGENCY FOR POSSIBLE
RESTRICTIONS IN YOUR AREA. FOR ADDITIONAL WEATHER INFORMATION...
CHECK OUR WEBSITE AT WWW.WEATHER.GOV/PENDLETON.
$$
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