Freezing Fog Advisory

URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
1228 PM PST Wed Jan 21 2026

ORZ050-221800-
/O.NEW.KPDT.ZF.Y.0011.260121T2100Z-260122T1800Z/
Wallowa County-
Including the cities of Enterprise, Wallowa, and Joseph
1228 PM PST Wed Jan 21 2026

...FREEZING FOG ADVISORY IN EFFECT UNTIL 10 AM PST THURSDAY...

* WHAT...Visibility less than a quarter mile in freezing fog.

* WHERE...Wallowa County.

* WHEN...Until 10 AM PST Thursday.

* IMPACTS...Low visibility could make driving conditions hazardous.
  Frost and freeze conditions could kill crops, other sensitive
  vegetation and possibly damage unprotected outdoor plumbing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

&&

$$

PDT

Extreme Cold Watch

URGENT - WEATHER MESSAGE
National Weather Service Great Falls MT
1240 PM MST Wed Jan 21 2026

MTZ305-306-311-221045-
/O.NEW.KTFX.EC.A.0001.260123T0100Z-260123T1700Z/
Hill County-Northern Blaine County-Bears Paw Mountains and
Southern Blaine-
Including the following locations: Havre, Zurich, Hogeland,
Harlem, Rocky Boy, Chinook, and Fort Belknap
1240 PM MST Wed Jan 21 2026

...EXTREME COLD WATCH IN EFFECT FROM THURSDAY EVENING THROUGH FRIDAY
MORNING...

* WHAT...Dangerously cold wind chills as low as 40 below possible.

* WHERE...Bears Paw Mountains and Southern Blaine, Hill County, and
  Northern Blaine County.

* WHEN...From Thursday evening through Friday morning.

* IMPACTS...The dangerously cold wind chills as low as 40 below zero
  could cause frostbite on exposed skin in as little as 10 minutes.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Dress in layers including a hat, face mask, and gloves if you must
go outside.

To see a graphical representation of the degree of stress on young
livestock please visit our webpage and select Local Programs then
Cold Air Advisory for Newborn Livestock.

&&

$$

IG

Air Stagnation Advisory

URGENT - WEATHER MESSAGE
National Weather Service Boise ID
123 PM MST Wed Jan 21 2026

IDZ011>014-016-028-033-ORZ061>064-221400-
/O.CON.KBOI.AS.Y.0001.000000T0000Z-260123T1200Z/
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 Cambridge, Burns, New Princeton, Council,
Baker, Anderson Dam, Goodrich, Buchanan, Crane, Diamond,
Glendale, Prairie, Mesa, Ola, Malheur City, Caldwell, Big Creek,
Fairfield, Fruitvale, Boise, Ontario, Cascade, Indian Valley,
Twin Falls, Blaine, Dunnean, Bear, Warm Lake, Hill City, Cuprum,
Nyssa, Corral, Soldier, McCall, Venator, Nampa, Selby, and Pine
123 PM MST Wed Jan 21 2026 /1223 PM PST Wed Jan 21 2026/

...AIR STAGNATION ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST /4 AM
PST/ FRIDAY...

* 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/ Friday.

* 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.

&&

$$

LC