Air Stagnation Advisory

URGENT - WEATHER MESSAGE
National Weather Service Boise ID
204 PM MST Tue Feb 3 2026

IDZ012-014-016-033-ORZ062>064-042200-
/O.CON.KBOI.AS.Y.0002.000000T0000Z-260209T1200Z/
Lower Treasure Valley-Upper Treasure Valley-Western Magic Valley-
Upper Weiser River-Baker County-Malheur County-Oregon Lower
Treasure Valley-
Including the cities of Goodrich, Twin Falls, Malheur City,
Caldwell, Nampa, Baker, Council, Indian Valley, Fruitvale,
Ontario, Mesa, Nyssa, Cambridge, Boise, and Glendale
204 PM MST Tue Feb 3 2026 /104 PM PST Tue Feb 3 2026/

...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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