Nov 1, 2023 · It's especially bad during sunny, cold stretches like those we've seen in recent weeks, because atmospheric conditions trap the pollution close ...

Nov 27, 2023 · High Pressure. It pushes the pollution down. This is typical, especially when the high pressure persists.

Dec 31, 2023 · this is from purple air, real time, outside sensors only.

Apr 17, 2024 · She said Seattle has 10% more air pollution than most American cities of its size because of industry sources and the transportation corridor.

Apr 27, 2023 · At times last year, Seattle had the worst air quality in the world, due to the effects of smoke from wildfires. I don't want to think about this ...

Dec 6, 2020 · It usually has to do with the weather. It's commonplace to see air quality degrade when it's sunny outside during the winter. That's because ...

Nov 13, 2022 · Consistent week of no rain/low wind with a following week of no rain, we'll probably continue to have poor air quality till the rain is back.

Nov 16, 2022 · Got an AQI alert, and it looks like the statewide air quality is unusually high, especially out east near Spokane.

Aug 20, 2023 · Seattle air quality reaches 'unhealthy' levels; wildfire smoke expected to clear Sunday night. News.

It just means that high pressure is forcing cold air down into the city and that there's no flow, either off shore or on shore to push the polluted (mostly ...