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

Home | Current Version | Previous Version | Text Only | Print | Product List | Glossary On
Versions: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
000
WWUS76 KPDT 121947
NPWPDT

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
1147 AM PST Tue Dec 12 2017

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

...AREAS OF DENSE FREEZING FOG FOR THE FOOTHILLS OF THE SOUTHERN
BLUE MOUNTAINS AND PORTIONS OF NORTH CENTRAL AND CENTRAL OREGON
UNTIL NOON WEDNESDAY...

.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.

ORZ508-130700-
/O.EXT.KPDT.ZF.Y.0013.000000T0000Z-171213T2000Z/
/O.CON.KPDT.AS.Y.0003.000000T0000Z-171215T1800Z/
Foothills of the Southern Blue Mountains of Oregon-
including the cities of Heppner, Condon, and Fossil
1147 AM PST Tue Dec 12 2017

...FREEZING FOG ADVISORY NOW IN EFFECT UNTIL NOON PST WEDNESDAY...
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...

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

* VISIBILITIES...One quarter mile or less at times.

* TIMING...Freezing fog through Wednesday morning...especially
  above 2000 feet. Stagnant air to persist for several more days

* 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. Motorists should be
  prepared for sudden changes in visibility. Also roadways and
  sidewalks may become slippery due to fog freezing on surfaces.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freezing Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.
Also...be alert for frost on bridge decks causing slippery roads.

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.

&&

$$

ORZ510-130700-
/O.EXT.KPDT.ZF.Y.0013.000000T0000Z-171213T2000Z/
/O.CON.KPDT.AS.Y.0003.000000T0000Z-171215T1800Z/
North Central Oregon-
including the cities of Dufur and Maupin
1147 AM PST Tue Dec 12 2017

...FREEZING FOG ADVISORY NOW IN EFFECT UNTIL NOON PST WEDNESDAY...
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST
FRIDAY...

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

* VISIBILITIES...One quarter mile or less at times.

* TIMING...Areas of freezing fog through Wednesday morning.
  Stagnant air to persist for several more days.

* 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. Motorists should be
  prepared for sudden changes in visibility. Also roadways and
  sidewalks may become slippery due to fog freezing on surfaces.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Freezing Fog Advisory means visibilities will frequently be
reduced to less than one quarter mile. If driving...slow down...
use your headlights...and leave plenty of distance ahead of you.
Also...be alert for frost on bridge decks causing slippery roads.

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.

&&

$$

WAZ024-026>029-520-521-130700-
/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
1147 AM PST Tue Dec 12 2017

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

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

* TIMING...Stagnant air to persist for several more days.

* 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.

&&

$$

ORZ041-044-050-505-507-509-511-130700-
/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-
East Slopes of the Oregon Cascades-Central Oregon-
including the cities of Arlington, The Dalles, Boardman,
Hermiston, Ione, Enterprise, Joseph, Wallowa, Dayville, John Day,
Mitchell, Monument, Spray, Pendleton, Pilot Rock, La Pine,
Sunriver, Bend, Madras, Prineville, and Redmond
1147 AM PST Tue Dec 12 2017

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

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

* TIMING...Stagnant air to persist for several more days.

* 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.

&&

$$


USA.gov is the U.S. government's official web portal to all federal, state and local government web resources and services.