AIR STAGNATION ADVISORY
Warning Issue Date: 832 PM PST SAT DEC 26 2009
AIR STAGNATION ADVISORY REMAINS IN EFFECT FOR MUCH OF THE
INTERIOR LOWLANDS UNTIL 10 AM PST MONDAY...
AN AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
MONDAY.
* A LOW LEVEL INVERSION WILL SET UP ACROSS THE INTERIOR TONIGHT
AND TRAP COOLER AIR NEAR THE SURFACE UNDER WARM AIR ALOFT AND
THEN IS EXPECTED TO LINGER INTO MONDAY.
* THE RESULTING LACK OF MIXING WILL ALLOW POLLUTANTS SUCH AS
WOOD SMOKE AND INDUSTRIAL EMISSIONS TO ACCUMULATE AND REDUCE
AIR QUALITY.
* THE MOST LIKELY PLACES TO EXPERIENCE REDUCED AIR QUALITY ARE
ALONG AND WEST OF THE I-5 CORRIDOR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN AIR STAGNATION ADVISORY IS ISSUED WHEN LOCALLY ESTABLISHED
CRITICAL VALUES OF TRANSPORT WINDS...MIXING HEIGHT...AND
VENTILATION ARE EXPECTED TO PERSIST FOR AT LEAST 72 HOURS. CHECK
WITH YOUR LOCAL AIR QUALITY AGENCY FOR POSSIBLE RESTRICTIONS IN
YOUR AREA.
$$
WWW.WEATHER.GOV
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