Air stagnation, Treasure Valley

Air stagnation advisory issued for Oregon Lower Treasure Valley until early Saturday evening
The National Weather Service issued an air stagnation advisory at 9:39 a.m. on Tuesday in effect until Saturday at 4 p.m. for Oregon Lower Treasure Valley.
Air Stagnation Advisory Issued for Portland and Vancouver Areas Until Monday
Portland is under an Air Stagnation Advisory due to calm winds and poor air circulation affecting air quality.
Dense fog advisory in Treasure Valley until noon, air stagnation persists through Saturday
A dense fog advisory is in effect in the upper Treasure Valley through noon. An air stagnation advisory has been extended through 5 p.m. on Saturday.A stagnant
Update: Air stagnation advisory affecting Oregon Lower Treasure Valley until Friday evening
On Monday at 3:53 p.m. an updated air stagnation advisory was issued by the National Weather Service in effect until Friday at 8 p.m. for Oregon Lower Treasure Valley.
Portland and Vancouver Warned of Poor Visibility and Pollution Levels Amid Dense Fog and Air Stagnation Advisory
Dense fog and an air stagnation advisory affect Portland and Vancouver areas, causing poor visibility and potential pollution issues.
Dense Fog Advisory in effect thru 11am for Treasure Valley, hazy sunshine in the afternoon
Dense fog is developing across the Treasure Valley this morning with visibility at less than a quarter of a mile for some.Use caution and take your time on thi
Dense Fog Warning For Idaho and Oregon Over 'Hazardous' Conditions
"Pedestrians and cyclists should wear bright or reflective clothing to increase the chances of being seen," the NWS advised.
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Winter weather woe: Inversion traps air and triggers air-quality advisory in Boise area
Jackson Macfarlane, a meteorologist with the National Weather Service in Boise, explained that an inversion is caused by the ...
Cloudy, chilly weather continues in Portland area; air stagnation advisory in effect
Saturday is off to a dry and cloudy start while much of the Portland area is under an air stagnation advisory from the National Weather Service through Monday. Saturday will continue to be mostly ...
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Dense fog to plague Treasure Valley this week, could create commute hazard in Boise area
Dense fog is set to envelop Treasure Valley for the rest of the week, as an inversion keeps cool air underneath warm air and ...