580
WWUS75 KBOI 102030
NPWBOI

URGENT - WEATHER MESSAGE
National Weather Service Boise ID
130 PM MST Wed Dec 10 2025

IDZ012-014-016-033-ORZ061>064-111200-
/O.NEW.KBOI.AS.Y.0004.251212T1200Z-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 Cambridge, Goodrich, Buchanan, Nyssa,
Boise, Ontario, Baker, Venator, Malheur City, Caldwell, Nampa,
Twin Falls, Mesa, Glendale, Burns, Crane, New Princeton, Indian
Valley, Dunnean, Diamond, Council, and Fruitvale
130 PM MST Wed Dec 10 2025 /1230 PM PST Wed Dec 10 2025/

...AIR STAGNATION ADVISORY IN EFFECT FROM 5 AM MST /4 AM PST/ FRIDAY
TO 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...From 5 AM MST /4 AM PST/ Friday to 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.

&&

$$

JY