An air stagnation advisory has been issued for Columbia county and will be in effect until 4 PM Friday. This means that air is not moving due to an inversion layer and pollution levels will be higher than normal due to the lack of movement.
Read the full text of the advisory below.
ORZ005>007-WAZ022-039-060300-
/O.EXT.KPQR.AS.Y.0004.000000T0000Z-111210T0000Z/
LOWER COLUMBIA-GREATER PORTLAND METRO AREA-
CENTRAL WILLAMETTE VALLEY-I-5 CORRIDOR IN COWLITZ COUNTY-
GREATER VANCOUVER AREA-
INCLUDING THE CITIES OF...ST. HELENS...HILLSBORO...PORTLAND...
OREGON CITY...GRESHAM...TROUTDALE...SALEM...MCMINNVILLE...
LONGVIEW...KELSO...VANCOUVER...BATTLE GROUND...CAMAS...WASHOUGAL
1055 AM PST MON DEC 5 2011
...AIR STAGNATION ADVISORY NOW IN EFFECT UNTIL 4 PM PST FRIDAY FOR
THE GREATER PORTLAND AND VANCOUVER METRO AREAS...THE CENTRAL
WILLAMETTE VALLEY...THE LOWER COLUMBIA AND THE I-5 CORRIDOR IN
COWLITZ COUNTY...
THE AIR STAGNATION ADVISORY IS NOW IN EFFECT UNTIL 4 PM PST
FRIDAY.
* TIMING: NOW THROUGH FRIDAY.
* CONDITIONS: AIR QUALITY IS EXPECTED TO REMAIN POOR THROUGH
FRIDAY DUE TO A STRONG TEMPERATURE INVERSION TRAPPING POLLUTANTS
NEAR IN THE LOWER ATMOSPHERE. THERE MAY BE SOME IMPROVEMENT
WEDNESDAY AS A WEATHER DISTURBANCE PASSES TO THE NORTH AND EAST
BUT SHOULD BE BRIEF IF AT ALL.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
AN AIR STAGNATION ADVISORY IS ISSUED WHEN LIMITED MOVEMENT OF AN
AIR MASS IS EXPECTED TO ALLOW POLLUTION LEVELS TO INCREASE...WITH
CONDITIONS PERSISTING AT LEAST 72 HOURS. CHECK WITH YOUR LOCAL
AIR QUALITY AGENCY FOR POSSIBLE RESTRICTIONS IN YOUR AREA. THIS
PRODUCT WILL BE UPDATED AT LEAST EVERY 24 HOURS WHEN CONDITIONS
EXIST OR ARE EXPECTED TO CONTINUE.
&&
