Air Stagnation Advisory
Expires 4:00 AM PST on February 07, 2012
Statement as of 2:50 PM PST on February 3, 2012
... Air stagnation advisory remains in effect until 4 am PST
Tuesday for the lower Columbia... .I-5 corridor in Cowlitz
County... South Washington Cascade foothills... central Willamette
Valley... and south Willamette Valley...
An air stagnation advisory remains in effect until 4 am PST
Tuesday.
* Timing: through early Tuesday.
* Locations include: Longview... Kelso... Toutle... Ariel...
Cougar... Eugene... Corvallis... Albany... Salem... McMinnville...
St. Helens
* impacts: air quality will decrease over time. People
sensitive to air quality issues should take any necessary
precautions.
Precautionary/preparedness actions...
An air stagnation advisory is issued when locally established
critical values of transport winds... mixing height... and
ventilation are expected to persist for at least 72 hours. This
product will be updated at least every 24 hours when conditions
exist or are expected to continue.