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

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WWUS76 KPDT 141857
NPWPDT

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
1057 AM PST Thu Dec 14 2017

...STAGNANT AIR CONDITIONS CONTINUE INTO FRIDAY...

.An upper level ridge will persist over the Pacific Northwest.
This ridge will cause air movement to be limited over large
portions of the region. Areas of freezing fog will be possible
and the air quality will become unhealthy at times.

WAZ024-026>029-520-521-151800-
/O.CON.KPDT.AS.Y.0003.000000T0000Z-171215T1800Z/
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 White Salmon, Ellensburg, Thorp, Naches,
Sunnyside, Toppenish, Yakima, Connell, Prosser, Tri-Cities,
Dayton, Waitsburg, Walla Walla, Appleton, Cle Elum, Cliffdell,
Goldendale, and Bickleton
1057 AM PST Thu Dec 14 2017

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

* AIR QUALITY...Moderate to unhealthy at times.

* TIMING...Stagnant air to persist into Friday.

* IMPACTS...Persons with respiratory issues should follow the
  advice of their physician on how to deal with poor air
  quality. Also outdoor burning may be limited, so please
  consult with your local burn agencies.

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.

&&

$$

ORZ041-044-050-505-507>511-151800-
/O.CON.KPDT.AS.Y.0003.000000T0000Z-171215T1800Z/
East Columbia River Gorge-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-
East Slopes of the Oregon Cascades-North Central Oregon-
Central Oregon-
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, La Pine, Sunriver, Dufur, Maupin, Bend, Madras,
Prineville, and Redmond
1057 AM PST Thu Dec 14 2017

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

* AIR QUALITY...Moderate to unhealthy at times.

* TIMING...Stagnant air will persist into Friday.

* IMPACTS...Persons with respiratory issues should follow the
  advice of their physician on how to deal with poor air
  quality. Also outdoor burning may be limited, so please
  consult with your local burn agencies.

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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