Weather & Radar
Home / Weather News /

Stagnant air, bad air quality: When will it change for the Pacific Northwest?

08:57 PM
January 26, 2022

Stagnant air, bad air quality
Any changes for the Pacific Northwest?

High pressure system will continue to bring stagnant air for the Pacific Northwest this week.

The Pacific Northwest has been under a strong high-pressure system which has brought several days with stagnant air, which has led to poor air quality from northern California through western Washington. How much longer until the air gets moving again?

Good question! First, we must give a brief explainer on high-pressure systems. High-pressure systems produce sinking air. When the high pressure is in the mid to upper levels of the atmosphere, and the weather patterns are not moving much, then we call this a blocking in the atmosphere. This blocking causes the high to sit over the same region, usually for days and sometimes up to a week or a bit longer.

The sinking air also causes the temperatures to warm. During the summer months, this is when extremely hot temperatures occur. This is just what happened in the Pacific Northwest in summer 2021, sending hundreds to emergency rooms due to heat exhaustion.

In the winter, warmer temperatures than average also happen but of course, due to the winter, no one is sent to the E.R. Like in the summer, sinking air also limits the wind speeds in the winter, making the air stagnant. With the air not moving much, bad air quality alerts get triggered.

As the air is not mixing near the surface, contamination becomes a big problem, especially in cities where air pollution, due to power plants, or lots of traffic, tends to be a frequent problem. Those people with respiratory problems, such as asthma, are the most at risk. Often burn bans are put in place in cities to help limit the harm in local air quality.

Air stagnation alerts are in place for central Oregon northward to Washington through Friday afternoon and for northern California through southwest Oregon through Sunday afternoon.

The high-pressure system, which has been centered near the Pacific Northwest, will get moving and lose its punch by the weekend. With this setup moving, the next storm will arrive by the beginning of February. Cooler air and stronger winds are in the forecast by Monday morning, but for cities like Seattle, the rain arrives by Saturday evening and continues through the beginning of next week.

In fact, the climate outlook shows a total flip, for the first two weeks of February, with below-average temperatures for much of the West and below normal temperatures for the eastern half of the U.S.

Irene Sans
More on the topic
Sunday, April 13, 2025

Your weather - Your shots

An international spring collection
Sunday, March 30, 2025

Your weather - Your shots

Spring tranquillity across the pond
Happy Earth Day
Tuesday, April 22, 2025

Employ renewable energy

Earth Day 2025 - Our Power, Our Planet
All weather news
This might also interest you
Louisville, Miss., received several inches of flooding rains on Thursday.
Tuesday, May 13, 2025

Prepare now

What to do in a flood
Tuesday, May 13, 2025

Breakfast Brief

Record heat in Texas
Monday, May 12, 2025

Summer arrives early

Texas-size heat wave
All articles
Weather & Radar

www.weatherandradar.com

instagramfacebookthreadsContact uslinkList
Privacy policy | Legal info