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One product issued by NWS for:

Air Stagnation Advisory

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PENDLETON OR
947 AM PST FRI FEB 12 2016

...STAGNANT CONDITIONS TO CONTINUE INTO SATURDAY MORNING...

.WEAKENING SHALLOW INVERSIONS WILL CONTINUE TO TRAP POLLUTANTS AT
OR NEAR THE SURFACE AND IN SOME MOUNTAIN VALLEYS. THIS WILL LEAD
TO CONTINUED AIR QUALITY ISSUES.

ORZ041-044-050-505-507-508-510-WAZ024-026>029-520-521-131800-
/O.CON.KPDT.AS.Y.0004.000000T0000Z-160213T1800Z/
EASTERN COLUMBIA RIVER GORGE OF OREGON-
LOWER COLUMBIA BASIN OF OREGON-WALLOWA COUNTY-JOHN DAY BASIN-
FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON-
FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON-
NORTH CENTRAL OREGON-EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-
KITTITAS VALLEY-YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-
FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-
EAST SLOPES OF THE WASHINGTON CASCADES-SIMCOE HIGHLANDS-
INCLUDING THE CITIES OF...ARLINGTON...THE DALLES...BOARDMAN...
HERMISTON...IONE...ENTERPRISE...JOSEPH...WALLOWA...DAYVILLE...
JOHN DAY...MITCHELL...MONUMENT...SPRAY...PENDLETON...PILOT ROCK...
HEPPNER...CONDON...FOSSIL...DUFUR...MAUPIN...WHITE SALMON...
ELLENSBURG...THORP...NACHES...SUNNYSIDE...TOPPENISH...YAKIMA...
CONNELL...PROSSER...TRI-CITIES...DAYTON...WAITSBURG...
WALLA WALLA...APPLETON...CLE ELUM...CLIFFDELL...GOLDENDALE...
BICKLETON
947 AM PST FRI FEB 12 2016

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
SATURDAY...

* AIR QUALITY...DIMINISHED AIR QUALITY WILL BE POSSIBLE INTO
  SATURDAY MORNING AS TEMPERATURE INVERSIONS COMBINE WITH LIGHT
  WINDS TO TRAP POLLUTANTS NEAR THE SURFACE. SOME LOCATIONS MAY
  BEGIN TO SEE AIR QUALITY IMPROVEMENTS LATE TONIGHT AS WINDS
  INCREASE.

* TIMING...THROUGH SATURDAY MORNING.

* IMPACTS...THOSE WITH RESPIRATORY ISSUES SHOULD LIMIT THEIR
  TIME OUTSIDE AND OR DOING PHYSICAL ACTIVITIES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

AN AIR STAGNATION ADVISORY INDICATES THAT DUE TO LIMITED MOVEMENT
OF AN AIR MASS ACROSS THE ADVISORY AREA...POLLUTION HAS THE
POTENTIAL TO INCREASE TO DANGEROUS LEVELS. PERSONS WITH
RESPIRATORY ILLNESS SHOULD FOLLOW THEIR PHYSICIANS ADVICE FOR
DEALING WITH HIGH LEVELS OF AIR POLLUTION

DURING PERIODS OF STAGNANT AIR...STATE AIR QUALITY AGENCIES
HIGHLY RECOMMEND THAT NO OUTDOOR BURNING OCCUR AND THAT
RESIDENTIAL WOOD BURNING DEVICES BE LIMITED AS MUCH AS POSSIBLE.
ACCORDING TO STATE AIR QUALITY AGENCIES...PROLONGED PERIODS OF
STAGNANT AIR CAN HOLD POLLUTANTS CLOSE TO THE GROUND...WHERE
PEOPLE LIVE AND BREATHE. CHECK WITH YOUR LOCAL BURN AGENCY FOR
ANY CURRENT RESTRICTIONS IN YOUR AREA

&&

$$




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