Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
544 PM MST Thu Jan 1 2026
IDZ060-021800-
/O.CON.KPIH.WW.Y.0001.000000T0000Z-260102T1800Z/
Bear River Range-
Including the cities of Emigration Summit
544 PM MST Thu Jan 1 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...
* WHAT...Snow expected. Total accumulation of 5 to 10 inches,
including Emigration Summit, with locally higher amounts up to 16
inches above pass level.
* WHERE...Bear River Range.
* WHEN...Until 11 AM MST Friday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Travel could be very difficult.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. Call 5 1 1 or visit
511.idaho.gov for the latest road conditions.
Be prepared for slippery roads. Slow down and use caution while
driving. If you are going outside, watch your first few steps taken
on stairs, sidewalks, and driveways. These surfaces could be icy and
slippery, increasing your risk of a fall and injury.
&&
$$
Visit weather.gov/pocatello for more information.
AM
URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
544 PM MST Thu Jan 1 2026
IDZ064-021800-
/O.EXA.KPIH.WW.Y.0001.000000T0000Z-260102T1800Z/
Big Hole Mountains-
Including the cities of Victor
544 PM MST Thu Jan 1 2026
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 AM MST FRIDAY...
* WHAT...Snow expected. Total accumulation of 5 to 10 inches,
including Pine Creek Pass, with locally higher amounts up to 16
inches above pass level.
* WHERE...Big Hole Mountains.
* WHEN...Until 11 AM MST Friday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Plan on slippery road
conditions.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. Call 5 1 1 or visit
511.idaho.gov for the latest road conditions.
Be prepared for slippery roads. Slow down and use caution while
driving. If you are going outside, watch your first few steps taken
on stairs, sidewalks, and driveways. These surfaces could be icy and
slippery, increasing your risk of a fall and injury.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
110 PM PST Thu Jan 1 2026
IDZ012-ORZ063-064-020600-
/O.CON.KBOI.WW.Y.0001.000000T0000Z-260102T0600Z/
Lower Treasure Valley-Malheur County-Oregon Lower Treasure Valley-
Including the cities of Malheur City, Nyssa, Ontario, Caldwell,
and Nampa
210 PM MST Thu Jan 1 2026 /110 PM PST Thu Jan 1 2026/
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 PM MST /10 PM
PST/ THIS EVENING...
* WHAT...Light freezing rain. Ice accumulations up to a tenth of an
inch.
* WHERE...Lower Treasure Valley Zones, and Malheur County.
* WHEN...Until 11 PM MST /10 PM PST/ this evening.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Very slippery sidewalks, roads
and bridges are possible, especially at the lowest elevations
where colder air will linger.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
110 PM PST Thu Jan 1 2026
IDZ033-ORZ062-020600-
/O.CON.KBOI.WW.Y.0001.000000T0000Z-260102T1200Z/
Upper Weiser River-Baker County-
Including the cities of Council, Goodrich, Fruitvale, Baker,
Cambridge, Glendale, Mesa, and Indian Valley
210 PM MST Thu Jan 1 2026 /110 PM PST Thu Jan 1 2026/
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST /4 AM
PST/ FRIDAY...
* WHAT...Snow and freezing rain. Snow accumulations up to two
inches, and ice accumulation a light glaze.
* WHERE...In Idaho, Upper Weiser River. In Oregon, Baker County.
* WHEN...Until 5 AM MST /4 AM PST/ Friday.
* IMPACTS...Roads, and especially bridges and overpasses, will
likely become slick and hazardous. Plan on slippery road
conditions.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.
&&
$$
ST
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
157 PM MST Thu Jan 1 2026
UTZ110-021200-
/O.CON.KSLC.WW.Y.0001.260101T2100Z-260102T1800Z/
Wasatch Mountains I-80 North-
Including the following locations - Logan Summit and Mantua
157 PM MST Thu Jan 1 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST FRIDAY
ABOVE 7500 FT...
* WHAT...Wet snow expected above 7500 feet. Total snow accumulations
between 6 and 18 inches, locally up to 20 inches in the Bear River
Range.
* WHERE...Wasatch Mountains I-80 North.
* WHEN...Until 11 AM MST Friday.
* IMPACTS...Winter driving conditions are expected, especially over
Logan Summit. Higher snow intensity may bring brief periods of
winter driving conditions below 7500 feet, especially Friday
morning.
* ADDITIONAL DETAILS...Heaviest snowfall is expected late Thursday
evening into early Friday morning.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. For winter road
conditions from the Utah Department of Transportation, visit
http://www.udottraffic.utah.gov.
For graphical depictions of the snowfall forecast, including
Official NWS Forecast, High End Amount, and Low End Amount, visit
weather.gov/slc/winter.
&&
$$
For more information from the National Weather Service visit
https://weather.gov/saltlakecity.
For information on potential travel impacts visit
http://udottraffic.utah.gov
Webber
URGENT - WINTER WEATHER MESSAGE
National Weather Service Salt Lake City UT
157 PM MST Thu Jan 1 2026
UTZ111-112-021200-
/O.CON.KSLC.WW.Y.0031.000000T0000Z-260102T1800Z/
Wasatch Mountains South of I-80-Western Uinta Mountains-
Including the following locations - Alta, Brighton, Moon Lake,
and Mirror Lake Highway
157 PM MST Thu Jan 1 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST
FRIDAY...
* WHAT...Snow expected. Snow accumulations between 4 to 12 inches
expected with locally higher totals up to 15 inches in the upper
Cottonwoods and high Uintas.
* WHERE...Wasatch Mountains South of I-80 and Western Uinta
Mountains.
* WHEN...Until 11 AM MST Friday.
* IMPACTS...Winter driving conditions are expected.
* ADDITIONAL DETAILS...Snow levels will increase through the day
today, peaking around 8500 feet in the evening before dropping to
around 7000 feet early Friday morning. Snowfall accumulations will
be heavily dependent on elevation as a result.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. For winter road
conditions from the Utah Department of Transportation, visit
http://www.udottraffic.utah.gov.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
118 PM MST Thu Jan 1 2026
...SNOW AND WINTRY MIX FOR THURSDAY NIGHT INTO FRIDAY...
.This set of Winter Weather Advisories has been issued due to
concerns for mixed precipitation types given the recent colder
weather and subsequently cold road temperatures. Do not expect
significant or major accumulations amounts of ice and/or snow. Rain
or wet snow falling on frozen surfaces can easily become very slick
and exacerbated by compaction and/or frictional heating from tires
on roadways.
IDZ006-021900-
/O.NEW.KMSO.WW.Y.0001.260102T0000Z-260102T1900Z/
Southern Clearwater Mountains-
1218 PM PST Thu Jan 1 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 11
AM PST FRIDAY...
* WHAT...Mixed precipitation expected. There is a likelihood of
minor to moderate winter weather impacts. Total snow accumulations
up to two inches and ice accumulations up to five-hundredths of an
inch.
* WHERE...Highway 12 Lowell to Lolo Pass, Elk City, and Dixie.
* WHEN...From 4 PM this afternoon to 11 AM PST Friday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Thursday evening and Friday morning
commutes, especially over higher passes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
118 PM MST Thu Jan 1 2026
...SNOW AND WINTRY MIX FOR THURSDAY NIGHT INTO FRIDAY...
.This set of Winter Weather Advisories has been issued due to
concerns for mixed precipitation types given the recent colder
weather and subsequently cold road temperatures. Do not expect
significant or major accumulations amounts of ice and/or snow. Rain
or wet snow falling on frozen surfaces can easily become very slick
and exacerbated by compaction and/or frictional heating from tires
on roadways.
IDZ009-010-021900-
/O.NEW.KMSO.WW.Y.0001.260101T2200Z-260102T1900Z/
Western Lemhi County-Eastern Lemhi County-
118 PM MST Thu Jan 1 2026
...WINTER WEATHER ADVISORY IN EFFECT UNTIL NOON MST FRIDAY...
* WHAT...Snow expected. There is a likelihood of minor to moderate
winter weather impacts. Total snow accumulations up to three
inches, up to five inches at Lost Trail Pass. Mixed precipitation
possible with ice accumulations up to one-tenth of an inch.
* WHERE...Shoup, Highway 93 Lost Trail Pass to Gibbonsville, Bannock
Pass, Lemhi Pass, Highway 28 Tendoy to Lone Pine, Salmon, and
Williams Creek Summit.
* WHEN...Until noon MST Friday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Thursday evening and Friday morning
commutes, especially over higher passes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
118 PM MST Thu Jan 1 2026
...SNOW AND WINTRY MIX FOR THURSDAY NIGHT INTO FRIDAY...
.This set of Winter Weather Advisories has been issued due to
concerns for mixed precipitation types given the recent colder
weather and subsequently cold road temperatures. Do not expect
significant or major accumulations amounts of ice and/or snow. Rain
or wet snow falling on frozen surfaces can easily become very slick
and exacerbated by compaction and/or frictional heating from tires
on roadways.
MTZ006-021900-
/O.NEW.KMSO.WW.Y.0001.260102T0000Z-260102T1900Z/
Bitterroot/Sapphire Mountains-
118 PM MST Thu Jan 1 2026
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
NOON MST FRIDAY...
* WHAT...Snow and mixed precipitation expected. There is a chance of
minor to moderate winter weather impacts. Total snow accumulations
up to two inches, up to five inches at Lost trail Pass, and ice
accumulations around a light glaze.
* WHERE...Lolo Pass to Lolo, and Highway 93 Sula to Lost Trail Pass.
* WHEN...From 5 PM this afternoon to noon MST Friday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Thursday evening and Friday morning
commutes, especially over higher passes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Riverton WY
1249 PM MST Thu Jan 1 2026
WYZ012-024-021400-
/O.CON.KRIW.WW.Y.0001.260101T2100Z-260103T0000Z/
Teton and Gros Ventre Mountains-Salt River and Wyoming Ranges-
1249 PM MST Thu Jan 1 2026
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST FRIDAY...
* WHAT...Snow expected. Total snow accumulations of 4 to 8 inches.
Locally higher amounts of 12 to 16 inches over the Tetons and the
Salt River Range. Wind gusts up to 30 mph late tonight into Friday
morning.
* WHERE...Teton and Gros Ventre Mountains and Salt River and Wyoming
Ranges.
* WHEN...Until 5 PM MST Friday.
* IMPACTS...Travel could be difficult. The hazardous conditions
could impact the Thursday evening and Friday morning commutes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling.
For graphical depictions of the snowfall forecast, including the
official NWS forecast, high end amounts, and low end amounts, visit
https://weather.gov/riw/winter .
For winter road conditions from the Wyoming Department of
Transportation, visit https://wyoroad.info .
&&
$$
For more information from the National Weather Service, visit
https://weather.gov/riw/ .
Dziewaltowski
Hazardous Weather Outlook
Hazardous Weather Outlook
National Weather Service Riverton WY
131 AM MST Thu Jan 1 2026
WYZ001>020-022>030-021245-
Yellowstone National Park-Absaroka Mountains-Cody Foothills-
North Bighorn Basin-Southwest Bighorn Basin-Southeast Bighorn Basin-
Owl Creek and Bridger Mountains-Bighorn Mountains West-
Bighorn Mountains Southeast-Northeast Johnson County-
Southeast Johnson County-Teton and Gros Ventre Mountains-
Jackson Hole-Wind River Mountains West-Wind River Mountains East-
Upper Wind River Basin-Wind River Basin-Lander Foothills-
Green Mountains and Rattlesnake Range-
Natrona County Lower Elevations-Casper Mountain-Star Valley-
Salt River and Wyoming Ranges-Upper Green River Basin Foothills-
Upper Green River Basin-South Lincoln County-
Rock Springs and Green River-Flaming Gorge-East Sweetwater County-
131 AM MST Thu Jan 1 2026
This Hazardous Weather Outlook is for Western and Central Wyoming.
.DAY ONE...Today and Tonight.
Snow begins for the western mountains through the afternoon, with
the heaviest period of snowfall through the overnight hours. Wintry
travel conditions are expected on mountain passes. A wet snow to a
rain/snow mix is expected in the western valleys.
Gusty west-southwest winds with gusts up to 50 mph over portions of
Natrona County, with the highest gusts on the south side of Casper.
.DAYS TWO THROUGH SEVEN...Friday through Wednesday.
Friday...Snow (mainly above 6500 feet) continues over western
Wyoming. Gusty west-southwest winds for the usual locations like the
Wind Corridor.
Sunday night into Monday...Additional snow is likely (70% chance)
for the western mountains and valleys.
.SPOTTER INFORMATION STATEMENT...
Weather spotters are encouraged to report significant weather
conditions according to Standard Operating Procedures.
$$
