Non-Precipitation Warnings / Watches / Advisories
Issued by NWS Pendleton, OR

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WWUS76 KPDT 101724
NPWPDT

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PENDLETON OR
924 AM PST WED FEB 10 2016

...STAGNANT CONDITIONS THIS WEEK...

.A RIDGE OF HIGH PRESSURE WILL PERSIST THROUGH THE WEEK. SHALLOW
INVERSIONS WILL TRAP POLLUTANTS AT OR NEAR THE SURFACE AND IN
SOME MOUNTAIN VALLEYS. THIS COULD LEAD TO SOME AIR QUALITY ISSUES
DURING THE WEEK.

ORZ502-503-101830-
/O.CAN.KPDT.AS.Y.0004.000000T0000Z-160213T1800Z/
NORTHERN BLUE MOUNTAINS OF OREGON-
SOUTHERN BLUE MOUNTAINS OF OREGON-
924 AM PST WED FEB 10 2016

...AIR STAGNATION ADVISORY IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN PENDLETON HAS CANCELLED THE AIR
STAGNATION ADVISORY.

LOW LEVEL INVERSIONS IN THE VALLEYS OF THE BLUE MOUNTAINS HAVE
BEEN MIXING OUT BY AROUND NOON EACH DAY THIS WEEK SO FAR. THE
MIXING AND BREAKING OF THESE INVERSIONS WILL CONTINUE TO OCCUR
THROUGH THE REMAINDER OF THE WEEK. MEANWHILE THE INVERSIONS OVER
THE BLUES WILL BE WEAKENING. THUS THE AIR STAGNATION ADVISORY OVER
THE BLUE MOUNTAINS HAS BEEN CANCELLED.

$$

ORZ041-044-050-505-507-508-510-WAZ024-026>029-520-521-111800-
/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
924 AM PST WED FEB 10 2016

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

* AIR QUALITY...DIMINISHED AIR QUALITY WILL BE POSSIBLE THROUGH
  THE WEEK AS TEMPERATURE INVERSIONS COMBINED WITH LIGHT WINDS
  TRAP POLLUTANTS NEAR THE SURFACE.

* TIMING...NOW 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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