weather.gov     
National Weather Service

Watches, Warnings & Advisories
NWS Homepage

Air Quality Alert


IDC041-121700-

Idaho Department OF Environmental Quality Pocatello ID
Air Quality Alert Message
Relayed by National Weather Service Pocatello ID
958 AM MST Mon Dec 11 2017

...AN AIR QUALITY ADVISORY FROM THE IDAHO DEPARTMENT OF
ENVIRONMENTAL QUALITY REMAINS IN EFFECT...

Due to elevated pollutant levels and a stable atmosphere, local
residential wood burning restriction ordinances continue for
Franklin County.

Those individuals having an inherent sensitivity to increased
particulate levels are encouraged to avoid prolonged physical
exertion outside. At these levels there is an increasing
likelihood of respiratory symptoms and increased aggravation of
asthma and/or lung ailments.

Another statement will be issued around noon Tuesday.

For more information please access the departments
website at http://airquality.deq.idaho.gov

This statement is issued by the Idaho Department of Environmental
Quality, Air Quality Division, Pocatello Idaho Regional Office.
Contact at 208 236 6160.



$$


Air Stagnation Advisory


URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
1158 AM PST Mon Dec 11 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 TUESDAY...

.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.

ORZ050-120700-
/O.EXA.KPDT.AS.Y.0003.000000T0000Z-171212T2000Z/
Wallowa County-
including the cities of Enterprise, Joseph, and Wallowa
1158 AM PST Mon Dec 11 2017

...AIR STAGNATION ADVISORY IN EFFECT UNTIL NOON PST TUESDAY...

The National Weather Service in Pendleton has issued an Air
Stagnation Advisory...which is in effect until noon PST Tuesday.

* AIR QUALITY...Moderate to unhealthy.

* 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.

&&

$$

URGENT - WEATHER MESSAGE
National Weather Service Spokane WA
948 AM PST Mon Dec 11 2017

...AIR STAGNATION ADVISORY EXTENDED THROUGH FRIDAY MORNING...

Our stagnant weather pattern is not expected to change until the
arrival of a weak frontal system on Friday. Until then, a strong
temperature inversion will remain over Washington and Idaho. Winds
will also be weak heightening the potential for the build up of
air pollution.

IDC009-017-021-035-049-055-057-061-069-079-WAC001-003-007-017-019-
023-025-043-047-051-063-065-075-122000-
/O.EXT.KOTX.AS.Y.0003.000000T0000Z-171215T1800Z/
Benewah-Bonner-Boundary-Clearwater-Idaho-Kootenai-Latah-Lewis-
Nez Perce-Shoshone-Adams-Asotin-Chelan-Douglas-Ferry-Garfield-
Grant-Lincoln-Okanogan-Pend Oreille-Spokane-Stevens-Whitman-
948 AM PST Mon Dec 11 2017 /1048 AM MST Mon Dec 11 2017/

...AIR STAGNATION ADVISORY NOW IN EFFECT UNTIL 10 AM PST /11 AM
MST/ FRIDAY...

* Air Quality...Pollutants may increase this week. Regional air
  quality sensors range from good to moderate. However, light
  winds and a strong inversion will increase the potential for the
  build up of air pollution and deteriorating air quality.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

An Air Stagnation Advisory indicates that due to limited movement
of an air mass across the advisory area. Pollution may increase
to unhealthy levels. Persons with respiratory illness should
follow their physicians advice for dealing with high levels of air
pollution.

&&

$$


Hazardous Weather Outlook


Hazardous Weather Outlook
National Weather Service Salt Lake City UT
614 PM MST Mon Dec 11 2017

UTZ001>016-019>021-517-518-WYZ021-121300-
Cache Valley/Utah Portion-Northern Wasatch Front-
Salt Lake and Tooele Valleys-Southern Wasatch Front-
Great Salt Lake Desert and Mountains-Wasatch Mountain Valleys-
Wasatch Mountains I-80 North-Wasatch Mountains South of I-80-
Western Uinta Mountains-Wasatch Plateau/Book Cliffs-
Western Uinta Basin-Castle Country-San Rafael Swell-
Sanpete/Sevier Valleys-West Central Utah-Southwest Utah-
Utahs Dixie and Zion National Park-South Central Utah-
Glen Canyon Recreation Area/Lake Powell-Central Mountains-
Southern Mountains-Southwest Wyoming-
614 PM MST Mon Dec 11 2017

This Hazardous Weather Outlook is for the western two thirds of
Utah and southwest Wyoming.

.DAY ONE...Tonight

Areas of fog, locally dense at times, will exist across portions
of northern Utah overnight. The Cache valley and areas around Bear
Lake will see widespread and locally dense fog return by around
midnight. Widespread fog over and near the Great Salt Lake, as
well as around Utah Lake, will impact travel where the fog turns
dense. Travelers should anticipate visibilities lowering to below
a quarter mile near these lakes. Ice crystals will also seed out
of the fog, leading to slick travel conditions along area roadways.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday

Inversion conditions will continue through at least Friday.
Expect fog to persist across many of the lower northern valleys
through the end of the week. Urban haze and poor air quality will
also continue through Friday due to the strong and persistent
valley inversions across northern Utah.

The next best chance to scour out the fog and haze will come
Friday night through Saturday. A weather disturbance approaching
from the northwest, though generating minimal amounts of
precipitation, will bring enough wind and colder air aloft to
break down the inversions and push fog and haze out of the area.


.SPOTTER INFORMATION STATEMENT...

Weather spotters are encouraged to report significant weather
conditions according to standard operating procedures.

$$

For more information from NOAA/s National Weather Service visit...
http://weather.gov/saltlakecity

For information on potential road travel impacts visit...
http://www.udottraffic.utah.gov/roadweatherforecast.aspx

Hazardous Weather Outlook
National Weather Service Riverton WY
233 AM MST Mon Dec 11 2017

WYZ001>020-022>030-121315-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Big Horn Basin-Southwest Big Horn Basin-
Southeast Big Horn Basin-Owl Creek and Bridger Mountains-
Bighorn Mountains West-Bighorn Mountains Southeast-
Northeast Johnson County-Southeast Johnson County-
Teton and Gros Ventre Mountains-Jackson Hole-
Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
233 AM MST Mon Dec 11 2017

This Hazardous Weather Outlook is for Western and Central Wyoming.

.DAY ONE...Today and Tonight.

Very patchy freezing fog will be possible in the Jackson or Star
Valleys this morning.

.DAYS TWO THROUGH SEVEN...Tuesday through Sunday.

Thursday night and Friday...High winds possible along the Cody
Foothills.

Saturday night and Sunday...Significant snowfall possible across
the northwest and west.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

$$

U.S. Dept. of Commerce
NOAA National Weather Service
1325 East West Highway
Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
Page last modified: June 2, 2009
NATIONAL WEATHER SERVICE: for Safety, for Work, for Fun - FOR LIFE