AIR STAGNATION ADVISORY
Warning Issue Date: 830 PM PST THU DEC 24 2009
AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST
SATURDAY...
AN AIR STAGNATION ADVISORY FOR BAKER AND MALHEUR COUNTIES IN
SOUTHEAST OREGON REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY.
* AIR QUALITY...WILL CONTINUE TO DETERIORATE IN THE COLD VALLEYS
AND BASINS DUE TO ACCUMULATION OF PARTICULATE MATTER WHERE
THERE WILL BE LITTLE OR NO AIR MOVEMENT.
* IMPACTS...THIS WILL AFFECT PEOPLE WITH RESPIRATORY PROBLEMS AND
THOSE ENGAGED IN STRENUOUS OUTDOOR ACTIVITIES. SMALL SIZE
PARTICULATES ARE OF GREAT CONCERN BECAUSE THEY CAN BE INHALED
DEEPLY INTO THE LUNGS WHERE THEY CAN REMAIN FOR YEARS. THE
HEALTH EFFECTS OF PARTICULATE MATTER VARY WITH THE SIZE...
CONCENTRATION...AND CHEMICAL COMPOSITION OF THE PARTICLES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT
OF AN AIR MASS ACROSS THE ADVISORY AREA...POLLUTION WILL 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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