WWUS75 KBOI 121946

NPWBOI



URGENT - WEATHER MESSAGE

National Weather Service Boise ID

1246 PM MST Fri Dec 12 2025



IDZ012-014-016-033-ORZ061>064-132215-

/O.CON.KBOI.AS.Y.0004.000000T0000Z-251215T1200Z/

Lower Treasure Valley-Upper Treasure Valley-Western Magic Valley-

Upper Weiser River-Harney County-Baker County-Malheur County-

Oregon Lower Treasure Valley-

Including the cities of Fruitvale, Ontario, Mesa, New Princeton,

Crane, Council, Indian Valley, Dunnean, Cambridge, Caldwell, Twin

Falls, Nampa, Buchanan, Glendale, Malheur City, Baker, Goodrich,

Diamond, Nyssa, Venator, Burns, and Boise

1246 PM MST Fri Dec 12 2025 /1146 AM PST Fri Dec 12 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.



&&



$$



JB