AIR STAGNATION ADVISORY
Warning Issue Date: 938 AM PST MON NOV 30 2009
...AIR STAGNATION ADVISORY IN EFFECT UNTIL NOON PST FRIDAY FOR
ELEVATIONS BELOW 2500 FEET...
THE NATIONAL WEATHER SERVICE IN MEDFORD HAS ISSUED AN AIR
STAGNATION ADVISORY...WHICH IS IN EFFECT UNTIL NOON PST FRIDAY FOR
ELEVATIONS BELOW 2500 FEET.
HIGH PRESSURE WILL BE OVER THE AREA MUCH OF THIS WEEK. LIGHT WINDS
AND LOW INVERSION LEVELS ARE EXPECTED OVER THE ROGUE AND ILLINOIS
VALLEYS. THIS WILL RESULT IN LITTLE MIXING OF THE AIR AND POOR
VENTILATION...WITH THE POTENTIAL FOR POLLUTANTS TO BE TRAPPED
NEAR GROUND LEVEL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT
OF AN AIR MASS ACROSS THE ADVISORY AREA...POLLUTION MAY INCREASE.
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