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Air Stagnation Advisory


URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
223 PM PST Thu Nov 26 2020

WAZ027-520-280000-
/O.CON.KPDT.AS.Y.0002.000000T0000Z-201130T1800Z/
Yakima Valley-East Slopes of the Washington Cascades-
Including the cities of Naches, Sunnyside, Toppenish, Yakima,
Cle Elum, and Cliffdell
223 PM PST Thu Nov 26 2020

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

* WHAT...Poor air quality expected to develop.

* WHERE...Yakima Valley and East Slopes of the Washington
  Cascades.

* WHEN...Until 10 AM PST Monday.

* IMPACTS...Poor air quality may cause issues for people with
  respiratory problems.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People with respiratory illness should follow their physician`s
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.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
223 PM PST Thu Nov 26 2020

ORZ505-280000-
/O.CON.KPDT.AS.Y.0002.000000T0000Z-201129T1800Z/
John Day Basin-
Including the cities of Dayville, John Day, Mitchell, Monument,
and Spray
223 PM PST Thu Nov 26 2020

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

* WHAT...Poor air quality expected to develop.

* WHERE...John Day Basin.

* WHEN...Until 10 AM PST Sunday.

* IMPACTS...Poor air quality may cause issues for people with
  respiratory problems.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People with respiratory illness should follow their physician`s
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.

&&

$$

For more information from the National Weather Service visit
https://weather.gov/Pendleton

URGENT - WEATHER MESSAGE
National Weather Service Medford OR
200 PM PST Thu Nov 26 2020

ORZ023>031-271700-
/O.CON.KMFR.AS.Y.0003.201127T0100Z-201130T1900Z/
Central Douglas County-Eastern Curry County and Josephine County-
Eastern Douglas County Foothills-Jackson County-
South Central Oregon Cascades-
Siskiyou Mountains and Southern Oregon Cascades-Klamath Basin-
Northern and Eastern Klamath County and Western Lake County-
Central and Eastern Lake County-
Including the cities of Drain, Elkton, Roseburg, Sutherlin,
Green, Myrtle Creek, Canyonville, Grants Pass, Cave Junction,
Steamboat, Toketee Falls, Medford, Ashland, Altamont,
Klamath Falls, Beatty, Bly, Chemult, Crescent, Gilchrist,
Sprague River, Adel, Lakeview, and Valley Falls
200 PM PST Thu Nov 26 2020

...AIR STAGNATION ADVISORY REMAINS IN EFFECT FROM 5 PM THIS
   AFTERNOON TO 11 AM PST MONDAY...

* WHAT...High pressure over the area during the advisory period
  will result in light winds, strong valley inversions, and
  limited mixing. These conditions are likely to result in
  periods of diminished air quality during the advisory period.

* WHERE...The valleys of Central Douglas County, Eastern Curry
  County and Josephine County, Eastern Douglas County Foothills,
  Jackson County, South Central Oregon Cascades, Siskiyou
  Mountains and Southern Oregon Cascades, Klamath Basin,
  Northern and Eastern Klamath County and Western Lake County
  and Central and Eastern Lake County.

* WHEN...From 5 PM Thursday to 11 AM PST Monday.

* IMPACTS...Air stagnation is likely to result in diminishing
  air quality with time, especially in and near areas with
  significant sources of air pollution. Diminished air quality
  is likely to cause health issues for people with respiratory
  problems if precautions are not taken.

* ADDITIONAL DETAILS...An incoming frontal system is expected to
  result in improving air quality Monday afternoon.

* View the hazard area in detail at
  https://www.wrh.noaa.gov/mfr/HAZARD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

People with respiratory illness should follow their physician`s
advice for dealing with diminished air quality. N95 masks are
effective at filtering out the majority of harmful air
particulates.

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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