Statement as of 9:18 AM PST on December 11, 2017
Expires 5:00 PM EST on December 14, 2017
... Air stagnation advisory remains in effect until 2 PM PST
* air quality... air quality may deteriorate due to an extended
period of stagnant air conditions.
* Timing... through Thursday afternoon.
* Locations... the south and central Willamette Valley.
* Impacts... limited ventilation may result in deteriorating air
quality continuing this week.
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