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Short Term Forecast

SHORT TERM FORECAST
NATIONAL WEATHER SERVICE PENDLETON OR
515 AM PST FRI FEB 12 2016

ORZ041-044-050-507-508-510-511-WAZ024-026>029-121700-
EASTERN COLUMBIA RIVER GORGE OF OREGON-
LOWER COLUMBIA BASIN OF OREGON-WALLOWA COUNTY-
FOOTHILLS OF THE NORTHERN BLUE MOUNTAINS OF OREGON-
FOOTHILLS OF THE SOUTHERN BLUE MOUNTAINS OF OREGON-
NORTH CENTRAL OREGON-CENTRAL OREGON-
EASTERN COLUMBIA RIVER GORGE OF WASHINGTON-KITTITAS VALLEY-
YAKIMA VALLEY-LOWER COLUMBIA BASIN OF WASHINGTON-
FOOTHILLS OF THE BLUE MOUNTAINS OF WASHINGTON-
INCLUDING THE CITIES OF...ARLINGTON...THE DALLES...BOARDMAN...
HERMISTON...IONE...ENTERPRISE...JOSEPH...WALLOWA...ATHENA...
PENDLETON...PILOT ROCK...HEPPNER...CONDON...FOSSIL...DUFUR...
MAUPIN...MORO...BEND...MADRAS...PRINEVILLE...REDMOND...
WHITE SALMON...ELLENSBURG...THORP...NACHES...SUNNYSIDE...
TOPPENISH...YAKIMA...CONNELL...PROSSER...TRI-CITIES...DAYTON...
WAITSBURG...WALLA WALLA
515 AM PST FRI FEB 12 2016

.NOW...
CLEARING SKIES AND ABUNDANT LOW LEVEL MOISTURE HAS ALLOWED AREAS
OF FOG TO FORM OVERNIGHT AND EARLY THIS MORNING. SOME OF THE FOG
HAS BEEN LOCALLY DENSE AT TIMES. THE FOG IS EXPECTED TO CONTINUE
THROUGH THE MORNING HOURS. TEMPERATURES HAVE BEEN MOSTLY ABOVE
FREEZING SO MOST OF THE FOG IS NOT FREEZING. HOWEVER THERE MAY BE
ISOLATED SPOTS WHERE THE TEMPERATURE IS BELOW FREEZING RESULTING
IN FREEZING FOG. THOSE TRAVELING ACROSS EASTERN OREGON AND
WASHINGTON THIS MORNING ARE URGED TO USE CAUTION AND BE PREPARED
FOR SUDDEN DROPS IN VISIBILITY. ALSO BEWARE OF ICE ON ROADWAYS AND
OTHER SURFACES WHERE THE TEMPERATURE IS BELOW FREEZING.

$$



Air Stagnation Advisory

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE PENDLETON OR
911 AM PST THU FEB 11 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 WILL LEAD TO SOME AIR QUALITY ISSUES
DURING THE WEEK.

ORZ041-044-050-505-507-508-510-WAZ024-026>029-520-521-121800-
/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
911 AM PST THU FEB 11 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 COMBINED WITH LIGHT
  WINDS TRAP POLLUTANTS NEAR THE SURFACE.

* 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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