East Slopes Northern Cascades Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Air Stagnation Advisory
Issued: 12:27 PM PST Nov. 20, 2018 – National Weather Service

... Air stagnation advisory remains in effect until 1 PM PST

* air quality... high pressure will cause strong temperature
inversions, trapping pollutants near the surface.

* Timing... through Wednesday.

* Impacts... air quality has the potential to be degraded,
especially during the overnight and morning hours. Before
burning leaves or yard waste, check for local burn bans.

Precautionary/preparedness actions...

An air stagnation advisory indicates that due to limited movement
of an air mass across the advisory area... pollution will increase
to dangerous levels. Persons with respiratory illness should
follow their physicians advice for dealing with high levels of
air pollution.