Central Willamette Valley Severe Watches & Warnings NOAA Weather Radio

Watches & Warnings

Air Stagnation Advisory
Issued: 1:51 PM PST Dec. 14, 2017 – National Weather Service

... Air stagnation advisory remains in effect until 10 am PST
Friday...

* air quality... air quality may remain diminished due to an
extended period of stagnant air conditions.

* Timing... through early Friday morning.

* Locations... the southern Willamette Valley.

* Impacts... limited ventilation may result in deteriorating air
quality continuing through early Friday.

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.