Lower Columbia Basin of Oregon Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Air Stagnation Advisory
Issued: 12:04 PM PST Nov. 20, 2018 – National Weather Service

... Air stagnation advisory remains in effect until 1 PM PST
Wednesday...
... Dense fog advisory will expire at noon PST today...

* air quality... a ridge of high pressure will remain across the
region and produce a low level inversions with light winds.
Air quality will slowly degrade over the period.

* Timing... poor air quality until at least Wednesday mid day.

* Impacts... poor air quality may cause
issues for people with respiratory problems.

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 unhealthy levels. Persons with
respiratory illness should follow their physicians advice for
dealing with high levels of air pollution.

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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