Headline:
Air Stagnation Advisory issued December 3 at 5:08PM PST until December 5 at 4:00AM PST by NWS Portland OR
Event:
Air Stagnation Advisory
Urgency:
Expected
Effective:
December 3, 2024 - 5:08pm
Expires:
December 4, 2024 - 5:15am
Description:
* WHAT...For the Freezing Fog Advisory, areas of fog and freezing
fog, with visibility one quarter mile or less. For the Air
Stagnation Advisory, poor air quality will continue. This is due
to an inversion and stagnant air conditions near the surface that
will continue to trap pollutants.
* WHERE...Central and Southern Willamette Valley.
* WHEN...For the Freezing Fog Advisory, until noon PST Wednesday.
For the Air Stagnation Advisory, until 4 AM PST Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems. Fog will be reforming this evening. Low
visibility could make driving conditions hazardous. With freezing
temperatures, moisture in the fog could freeze on bridges and
overpasses, making slick and icy spots.
Instruction:
If driving, slow down, use your headlights, and leave plenty of
distance ahead of you. Be prepared for thick fog and potentially
slick spots later this evening through early Wednesday morning.
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.
Area Description:
West Central Willamette Valley; East Central Willamette Valley; Benton County Lowlands; Linn County Lowlands; Lane County Lowlands
Forcast Office:
NWS Portland OR