Seattle and Vicinity Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Air Stagnation Advisory
Issued: 9:38 AM PST Dec. 11, 2017 – National Weather Service

... Air stagnation advisory now in effect until 2 PM PST

* air quality... dry conditions, light winds and poor mixing has
lead to stagnant conditions in the interior lowlands. Stagnant
conditions will trap pollutants near the surface which will
lead to deteriorating air quality.

* Timing... through Thursday afternoon.

* Main impact... deteriorating air quality may affect people with
respiratory issues. Check with your local clean air agencies
for possible burn bans.

Nwcleanairwa.Gov www.Orcaa.Org www.Pscleanair.Org
www.Swcleanair.Org www.Ecy.WA.Gov

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.