Watches, Warnings & Advisories



One product issued by NWS for: Hillsboro OR

Air Stagnation Advisory

URGENT - WEATHER MESSAGE
National Weather Service Portland OR
403 PM PST Thu Dec 5 2024

ORZ104-105-108-109-113>115-123>125-WAZ202-204-205-208-061515-
/O.CON.KPQR.AS.Y.0001.000000T0000Z-241207T1200Z/
North Oregon Coast Range Lowlands-Central Oregon Coast Range
Lowlands-Lower Columbia River-Tualatin Valley-Outer Southeast
Portland Metro-West Central Willamette Valley-East Central
Willamette Valley-Clackamas County Cascade Foothills-Cascade
Foothills of Marion and Linn Counties-Lane County Cascade
Foothills-Willapa and Wahkiakum Lowlands-Cowlitz County Lowlands-
North Clark County Lowlands-South Washington Cascade Foothills-
Including the cities of Zigzag, Deadwood, Clark County
Fairgrounds, Mapleton, Welches, Battle Ground, Heisson,
Cherryville, Blaine, Cottage Grove Lake, Farmington, Blodgett,
Dorena, Necanicum, Scappoose, Oakridge, Beaverton, Rhododendron,
Hockinson, Fargher Lake, Boring, Proebstel, Camp Bonneville,
Menlo, Warren, Alston, St. Helens, Tualatin, Three Lynx, Green
Peter Reservoir, Mayger, Klaskanine Summit, Svenson, Holley,
Dorena Reservoir, Vida, Kelso, Longview, Rose Valley, Tiernan,
Spitzenberg, Hillsboro, Orchards, Alsea, Willapa, Brightwood,
Shortys Corner, Vernonia, Swisshome, Tigard, Salem, Aloha,
Cascadia, Sifton, West Salem, Pigeon Springs, Burnt Woods, and
Blue River
403 PM PST Thu Dec 5 2024

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 4 AM PST
SATURDAY...

* WHAT...Light winds and limited air movement will lead to a period
  of stagnant air conditions. This scenario could result in the
  build up of air pollutants over time.

* WHERE...Foothills of the Northern and Central Oregon Cascades,
  North and Central Coast Range Valleys of Oregon, Lower Columbia
  River and Cowlitz River Valleys, Central Willamette Valley,
  Tualatin Valley, Outer Southeast Portland Metro, Willapa and
  Wahkiakum Lowlands, North Clark County Lowlands, and South
  Washington Cascade Foothills.

* WHEN...Until 4 AM PST Saturday.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

People with respiratory illness should follow their physician`s
advice for dealing with high levels of air pollution during periods
of stagnant air, especially if an Air Quality Alert is in effect for
your area. To see if an Air Quality Alert is in effect for your
area, go to www.weather.gov/pqr and left-click your location on the
homepage map display. Alternatively, you could also type your
location into the search bar found on the top-left hand side of the
homepage. From there, you will see an Air Quality Alert listed at
the top if one is in effect for your location; you can click the
alert to read more details if applicable.

&&

$$