Lower Treasure Valley
Air Stagnation Advisory from SUN 6:00 PM MST until THU 10:00 AM MST
Issued December, 27 2025 at 12:56 PM - US/Mountain expires January, 01 2026 at 10:00 AM - US/Mountain
...AIR STAGNATION ADVISORY IN EFFECT FROM 6 PM MST /5 PM PST/ SUNDAY
TO 10 AM MST /9 AM PST/ THURSDAY...
* WHAT...An extended period of stagnant air, with light winds and
little vertical mixing. This is due to an inversion near the
surface that will trap pollutants in the valleys.
* WHERE...In the valleys of south central and southwest Idaho and
northeast and southeast Oregon below 5000 feet MSL.
* WHEN...From 6 PM MST /5 PM PST/ Sunday to 10 AM MST /9 AM PST/
Thursday.
* IMPACTS...Poor air quality may cause issues for people with
respiratory problems.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Persons with respiratory illness should follow their physicians
advice for dealing with high levels of air pollution during periods
of stagnant air.
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