284
WWUS75 KBOI 092027
NPWBOI
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BOISE ID
127 PM MST FRI JAN 9 2026
IDZ011>014-016-028-033-ORZ061>064-102100-
/O.NEW.KBOI.AS.Y.0001.260110T0600Z-260115T1200Z/
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 CORRAL, TWIN FALLS, BURNS, OLA, DIAMOND,
COUNCIL, BEAR, NYSSA, FRUITVALE, MALHEUR CITY, INDIAN VALLEY, BIG
CREEK, SELBY, WARM LAKE, CALDWELL, BLAINE, VENATOR, PRAIRIE, HILL
CITY, BUCHANAN, BAKER, BOISE, CUPRUM, MCCALL, PINE, GOODRICH,
CAMBRIDGE, DUNNEAN, FAIRFIELD, GLENDALE, SOLDIER, NEW PRINCETON,
ONTARIO, NAMPA, MESA, CRANE, CASCADE, AND ANDERSON DAM
127 PM MST FRI JAN 9 2026 /1227 PM PST FRI JAN 9 2026/
...AIR STAGNATION ADVISORY IN EFFECT FROM 11 PM MST /10 PM PST/ THIS
EVENING TO 5 AM MST /4 AM PST/ THURSDAY...
* 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 11 PM MST /10 PM PST/ THIS EVENING TO 5 AM MST /4 AM
PST/ THURSDAY.
* 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.
JDS
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