On Thursday at 3:37 p.m. an air stagnation advisory was released by the National Weather Service valid from Friday 10 a.m. until Sunday 10 a.m. for Tualatin Valley, West Hills and Chehalem Mountains, Inner Portland Metro, West Central Willamette Valley, East Central Willamette Valley, Benton County Lowlands, Linn County Lowlands and Lane County Lowlands.
The weather service says to be ready for, “Light winds and limited air movement will lead to a period of stagnant air conditions.”…