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AIR STAGNATION ADVISORY
Warning Issue Date: 816 AM PST TUE NOV 18 2008
...DENSE FOG ADVISORY IN EFFECT UNTIL NOON PST TODAY...
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST
TODAY...
THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL NOON PST TODAY. AN AIR
STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST TODAY.
HIGH PRESSURE WILL CONTINUE OVER THE PACIFIC NORTHWEST THROUGH
TUESDAY. MIXING HEIGHTS IN THE LOWER COLUMBIA BASIN AND
SURROUNDING AREAS WILL REMAIN AROUND 1000 FEET ABOVE GROUND LEVEL
THROUGH AT LEAST NOON ON TUESDAY. THE LOW MIXING HEIGHTS COMBINED
WITH LIGHT WINDS WILL RESULT IN POLLUTANTS BEING TRAPPED NEAR
GROUND LEVEL.
THE INVERSION HAS ALSO TRAPPED MOISTURE IN THE COOLER AIR NEAR
THE SURFACE. THIS HAS ALLOWED AREAS OF DENSE FOG TO FORM IN THE
LOWER COLUMBIA BASIN. AREA AIRPORT OBSERVATIONS HAVE BEEN
REPORTING VISIBILITIES OF ONE QUARTER MILE OR LESS WITH AREA WEB
CAMS SHOWING SIMILAR REDUCED VISIBILITIES. VISIBILITY IS EXPECTED
TO REMAIN BELOW ONE QUARTER MILE AT TIMES THROUGH THE REST OF THE
MORNING HOURS.
AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED AIR
MOVEMENT ACROSS THE ADVISORY AREA...POLLUTION WILL INCREASE.
CHECK WITH YOUR LOCAL AIR QUALITY AGENCY FOR POSSIBLE BURNING
RESTRICTIONS IN YOUR AREA. FOR ADDITIONAL WEATHER INFORMATION...
CHECK OUR WEBSITE AT WWW.WEATHER.GOV/PENDLETON.
A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE LOW BEAM HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF
YOU. FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT
WWW.WEATHER.GOV/PENDLETON.
$$ DENSE FOG ADVISORY
Warning Issue Date: 816 AM PST TUE NOV 18 2008
...DENSE FOG ADVISORY IN EFFECT UNTIL NOON PST TODAY...
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST
TODAY...
THE NATIONAL WEATHER SERVICE IN PENDLETON HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL NOON PST TODAY. AN AIR
STAGNATION ADVISORY REMAINS IN EFFECT UNTIL NOON PST TODAY.
HIGH PRESSURE WILL CONTINUE OVER THE PACIFIC NORTHWEST THROUGH
TUESDAY. MIXING HEIGHTS IN THE LOWER COLUMBIA BASIN AND
SURROUNDING AREAS WILL REMAIN AROUND 1000 FEET ABOVE GROUND LEVEL
THROUGH AT LEAST NOON ON TUESDAY. THE LOW MIXING HEIGHTS COMBINED
WITH LIGHT WINDS WILL RESULT IN POLLUTANTS BEING TRAPPED NEAR
GROUND LEVEL.
THE INVERSION HAS ALSO TRAPPED MOISTURE IN THE COOLER AIR NEAR
THE SURFACE. THIS HAS ALLOWED AREAS OF DENSE FOG TO FORM IN THE
LOWER COLUMBIA BASIN. AREA AIRPORT OBSERVATIONS HAVE BEEN
REPORTING VISIBILITIES OF ONE QUARTER MILE OR LESS WITH AREA WEB
CAMS SHOWING SIMILAR REDUCED VISIBILITIES. VISIBILITY IS EXPECTED
TO REMAIN BELOW ONE QUARTER MILE AT TIMES THROUGH THE REST OF THE
MORNING HOURS.
AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED AIR
MOVEMENT ACROSS THE ADVISORY AREA...POLLUTION WILL INCREASE.
CHECK WITH YOUR LOCAL AIR QUALITY AGENCY FOR POSSIBLE BURNING
RESTRICTIONS IN YOUR AREA. FOR ADDITIONAL WEATHER INFORMATION...
CHECK OUR WEBSITE AT WWW.WEATHER.GOV/PENDLETON.
A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE LOW BEAM HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF
YOU. FOR ADDITIONAL WEATHER INFORMATION...CHECK OUR WEB SITE AT
WWW.WEATHER.GOV/PENDLETON.
$$
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