094 

WWUS75 KBOI 302025

NPWBOI



URGENT - WEATHER MESSAGE

National Weather Service Boise ID

125 PM MST Tue Dec 30 2025



IDZ016-ORZ062-302130-

/O.CAN.KBOI.AS.Y.0005.000000T0000Z-260103T1200Z/

Western Magic Valley-Baker County-

Including the cities of Baker and Twin Falls

125 PM MST Tue Dec 30 2025 /1225 PM PST Tue Dec 30 2025/



...AIR STAGNATION ADVISORY IS CANCELLED...



Daytime winds will provide enough mixing to keep stagnant conditions 

from persisting.



$$



IDZ011-013-311300-

/O.EXB.KBOI.AS.Y.0005.000000T0000Z-260103T1500Z/

West Central Mountains-Boise Mountains-

Including the cities of Cascade, Big Creek, Pine, Cuprum, Bear,

McCall, Prairie, Warm Lake, Anderson Dam, and Ola

125 PM MST Tue Dec 30 2025



...AIR STAGNATION ADVISORY IN EFFECT UNTIL 8 AM MST SATURDAY...



* WHAT...A 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...Boise Mountains and West Central Mountains.



* WHEN...Until 8 AM MST Saturday.



* 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.



&&



$$



IDZ012-014-028-033-ORZ061-063-064-311300-

/O.EXT.KBOI.AS.Y.0005.000000T0000Z-260103T1500Z/

Lower Treasure Valley-Upper Treasure Valley-Camas Prairie-Upper

Weiser River-Harney County-Malheur County-Oregon Lower Treasure

Valley-

Including the cities of Boise, Hill City, Burns, Dunnean,

Fairfield, Soldier, New Princeton, Venator, Corral, Blaine,

Nampa, Malheur City, Fruitvale, Nyssa, Diamond, Council,

Caldwell, Indian Valley, Goodrich, Selby, Ontario, Crane,

Buchanan, Mesa, Glendale, and Cambridge

125 PM MST Tue Dec 30 2025 /1225 PM PST Tue Dec 30 2025/



...AIR STAGNATION ADVISORY NOW IN EFFECT UNTIL 8 AM MST /7 AM PST/ 

SATURDAY...



* WHAT...A 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 southwest Idaho and southeast Oregon.



* WHEN...Until 8 AM MST /7 AM PST/ Saturday.



* 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.



&&



$$