975
WWUS75 KBOI 160951
NPWBOI
URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BOISE ID
251 AM MST FRI JAN 16 2026
IDZ012-014-016-ORZ064-162000-
/O.CON.KBOI.AS.Y.0001.000000T0000Z-260119T1200Z/
/O.CON.KBOI.FG.Y.0004.000000T0000Z-260116T2000Z/
LOWER TREASURE VALLEY-UPPER TREASURE VALLEY-WESTERN MAGIC VALLEY-
OREGON LOWER TREASURE VALLEY-
INCLUDING THE CITIES OF BOISE, NYSSA, TWIN FALLS, ONTARIO,
CALDWELL, AND NAMPA
251 AM MST FRI JAN 16 2026 /151 AM PST FRI JAN 16 2026/
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 1 PM MST /NOON PST/
THIS AFTERNOON...
...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST /4 AM
PST/ MONDAY...
* WHAT...FOR THE DENSE FOG ADVISORY, VISIBILITY ONE QUARTER MILE OR
LESS IN DENSE FOG. FOR THE AIR STAGNATION ADVISORY, 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
SOUTHEAST OREGON.
* WHEN...FOR THE DENSE FOG ADVISORY, UNTIL 1 PM MST /NOON PST/ THIS
AFTERNOON. FOR THE AIR STAGNATION ADVISORY, UNTIL 5 AM MST /4 AM
PST/ MONDAY.
* IMPACTS...LOW VISIBILITY COULD MAKE DRIVING CONDITIONS HAZARDOUS.
POOR AIR QUALITY MAY CAUSE ISSUES FOR PEOPLE WITH RESPIRATORY
PROBLEMS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF DRIVING, SLOW DOWN, USE YOUR LOW-BEAM HEADLIGHTS, AND LEAVE
PLENTY OF DISTANCE AHEAD OF YOU.
PERSONS WITH RESPIRATORY ILLNESS SHOULD FOLLOW THEIR PHYSICIANS
ADVICE FOR DEALING WITH HIGH LEVELS OF AIR POLLUTION DURING PERIODS
OF STAGNANT AIR.
IDZ033-162000-
/O.CON.KBOI.AS.Y.0001.000000T0000Z-260119T1200Z/
/O.CON.KBOI.FG.Y.0004.000000T0000Z-260116T2000Z/
UPPER WEISER RIVER-
INCLUDING THE CITIES OF GLENDALE, MESA, FRUITVALE, CAMBRIDGE,
INDIAN VALLEY, COUNCIL, AND GOODRICH
251 AM MST FRI JAN 16 2026
...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 1 PM MST THIS
AFTERNOON...
..AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST MONDAY
* WHAT...FOR THE DENSE FOG ADVISORY, VISIBILITY ONE QUARTER MILE OR
LESS IN DENSE FOG. FOR THE AIR STAGNATION ADVISORY, 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...UPPER WEISER RIVER.
* WHEN...FOR THE DENSE FOG ADVISORY, UNTIL 1 PM MST THIS AFTERNOON.
FOR THE AIR STAGNATION ADVISORY, UNTIL 5 AM MST MONDAY.
* IMPACTS...LOW VISIBILITY COULD MAKE DRIVING CONDITIONS HAZARDOUS.
POOR AIR QUALITY MAY CAUSE ISSUES FOR PEOPLE WITH RESPIRATORY
PROBLEMS.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF DRIVING, SLOW DOWN, USE YOUR LOW-BEAM HEADLIGHTS, AND LEAVE
PLENTY OF DISTANCE AHEAD OF YOU.
PERSONS WITH RESPIRATORY ILLNESS SHOULD FOLLOW THEIR PHYSICIANS
ADVICE FOR DEALING WITH HIGH LEVELS OF AIR POLLUTION DURING PERIODS
OF STAGNANT AIR.
IDZ011-013-028-ORZ061>063-162000-
/O.CON.KBOI.AS.Y.0001.000000T0000Z-260119T1200Z/
WEST CENTRAL MOUNTAINS-BOISE MOUNTAINS-CAMAS PRAIRIE-HARNEY
COUNTY-BAKER COUNTY-MALHEUR COUNTY-
INCLUDING THE CITIES OF DUNNEAN, BLAINE, BIG CREEK, WARM LAKE,
BAKER, BUCHANAN, FAIRFIELD, VENATOR, SELBY, PINE, MCCALL, HILL
CITY, OLA, CUPRUM, SOLDIER, BEAR, NEW PRINCETON, MALHEUR CITY,
BURNS, CORRAL, PRAIRIE, CASCADE, CRANE, DIAMOND, AND ANDERSON DAM
251 AM MST FRI JAN 16 2026 /151 AM PST FRI JAN 16 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 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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