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marble falls

(70,004 posts)
Tue Dec 2, 2025, 10:18 AM Tuesday

Thousands Urged To Stay Inside In Oregon

Thousands Urged To Stay Inside In Oregon

By Amanda Greenwood

https://www.newsweek.com/thousands-urged-stay-inside-oregon-air-pollution-epa-ozone-11139198

-snip-

The map showed an area of fine particle (PM2.5) pollution in the "unhealthy" Air Quality Index (AQI) category around La Pine in Deschutes County, and John Day in Grant County as of 2.45 a.m. ET.

PM2.5 are tiny particles of pollution that are usually 2.5 micrometers or less in size—roughly 30 times smaller than a strand of hair—that enter the atmosphere and are often unknowingly inhaled. They can come from various sources, ranging from construction sites and wildfires, to power plants and car emissions.


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A man crosses a street in Portland, Oregon, amid hazy weather conditions in 2020. (ROBYN BECK/AFP/Getty Images) | Photo by ROBYN BECK/AFP via Getty Images

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Thousands Urged To Stay Inside In Oregon (Original Post) marble falls Tuesday OP
Yikes! Cause? surfered Tuesday #1
Maybe a confluence of temp, an inversion, holiday traffic and powerplants producing for the cold season ... marble falls Tuesday #2
Is this near Bend, OR? surfered Tuesday #3
Yup, 2naSalit Tuesday #6
There's a wildfire in that area. tinrobot Tuesday #5
Inversions trap air in valleys; the smoke builds up. maxsolomon Tuesday #11
They used a 5 yr old photo? leftstreet Tuesday #4
No one has time to drive to John Day to take a picture of bad air. maxsolomon Tuesday #8
The people living there might have cameras leftstreet Tuesday #9
Definitely possible. maxsolomon Tuesday #10
Plus the prevailing northwesterly winds would indicate Portland would not be impacted by an event near Bend Oregon Brother Buzz Tuesday #12
Bend is a beautiful area surfered Tuesday #7

marble falls

(70,004 posts)
2. Maybe a confluence of temp, an inversion, holiday traffic and powerplants producing for the cold season ...
Tue Dec 2, 2025, 11:00 AM
Tuesday

... and AI.

maxsolomon

(37,993 posts)
11. Inversions trap air in valleys; the smoke builds up.
Tue Dec 2, 2025, 02:21 PM
Tuesday

Wood burning stoves, vehicle exhaust can do it. Places like Missoula are notorious for crap air from them.

maxsolomon

(37,993 posts)
8. No one has time to drive to John Day to take a picture of bad air.
Tue Dec 2, 2025, 01:54 PM
Tuesday

It's in the middle of nowhere.

maxsolomon

(37,993 posts)
10. Definitely possible.
Tue Dec 2, 2025, 02:19 PM
Tuesday

Newsweek is also understaffed and lazy, so they just pulled a stock picture of "Bad Air - Oregon".

Brother Buzz

(39,404 posts)
12. Plus the prevailing northwesterly winds would indicate Portland would not be impacted by an event near Bend Oregon
Tue Dec 2, 2025, 02:25 PM
Tuesday
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