URGENT - WEATHER MESSAGE
National Weather Service Boise ID
154 PM MST Sat Dec 13 2025
West Central Mountains-Lower Treasure Valley-Boise Mountains- Upper Treasure Valley-Western Magic Valley-Camas Prairie-Upper Weiser River-Harney County-Baker County-Malheur County-Oregon Lower Treasure Valley- Including the cities of New Princeton, Caldwell, Corral, Ola, Venator, Nampa, Boise, Nyssa, McCall, Burns, Warm Lake, Blaine, Crane, Buchanan, Malheur City, Bear, Diamond, Selby, Glendale, Dunnean, Council, Prairie, Pine, Baker, Fruitvale, Mesa, Hill City, Fairfield, Soldier, Goodrich, Twin Falls, Ontario, Indian Valley, Cambridge, Cascade, Anderson Dam, Cuprum, and Big Creek 154 PM MST Sat Dec 13 2025 /1254 PM PST Sat Dec 13 2025/
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST /4 AM PST/ MONDAY...
* 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 continue to trap pollutants.
* WHERE...Portions of south central and southwest Idaho and northeast and southeast Oregon.
* WHEN...Until 5 AM MST /4 AM PST/ Monday.
* 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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