Winter Storm Warning
URGENT - WINTER WEATHER MESSAGE
National Weather Service Great Falls MT
146 PM MST Thu Dec 4 2025
...SERIES OF WINTER STORMS TO AFFECT THE MOUNTAINS AND PASSES
THROUGH THE SATURDAY...
.The first round of heavy snow is expected to last through early
Friday morning and will primarily focus on the mountains of central
and southwest Montana with 4 to 8 inches possible along the mountain
passes including Bozeman and Kings Hill Pass. A period of lighter
snowfall is expected Friday morning and afternoon. The second and
more widespread round of heavier snowfall is expected to arrive
Friday evening and continue into Saturday evening with an additional
6 to 12 inches possible over the passes and higher amounts above
pass level.
MTZ327-051200-
/O.UPG.KTFX.WS.A.0018.251205T1200Z-251207T0000Z/
/O.EXB.KTFX.WS.W.0019.251205T0000Z-251207T0000Z/
Northwest Beaverhead County-
Including the following locations: Dewey, Chief Joseph Pass, Big
Hole Pass, Wisdom, and Wise River
146 PM MST Thu Dec 4 2025
...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...
* WHAT...Heavy snow expected. Snowfall totals between 2 and 6 inches
in the Big Hole Valley and between 8 and 15 inches at pass level.
Winds gusting as high as 40 mph.
* WHERE...Northwest Beaverhead County.
* WHEN...From 5 PM this afternoon to 5 PM MST Saturday.
* IMPACTS...Travel could be very difficult and tire chains may be
required for some vehicles. Those in the backcountry should ensure
they are prepared for dangerous conditions. Gusty winds could
bring down tree branches.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. The latest road conditions can
be obtained by calling 5 1 1 or visiting the MDT Road Report website.
Remember, a Winter Storm Warning means that there is at least an 80%
chance of impactful winter weather conditions during the warning
period.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
102 PM MST Thu Dec 4 2025
...PROLONGED SNOW EVENT...
.A plume of snow will continue to impacted north central Idaho into
west central and southwest Montana tonight. The snow activity will
decrease in intensity during the day on Friday, then a second plume
of precipitation will impact the region late Friday through Saturday.
IDZ005-006-052015-
/O.UPG.KMSO.WS.A.0010.251205T1200Z-251207T0000Z/
/O.NEW.KMSO.WS.W.0012.251205T0000Z-251207T0000Z/
Northern Clearwater Mountains-Southern Clearwater Mountains-
1202 PM PST Thu Dec 4 2025
...WINTER STORM WARNING IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM
PST SATURDAY...
* WHAT...Heavy snow expected. There is a likelihood of major winter
storm impacts. Total snow accumulations 2 to 6 inches in the
valleys and 9 to 18 inches in the higher terrain including Lolo
Pass.
* WHERE...Highway 11 Pierce to Headquarters, Highway 12 Lowell to
Lolo Pass, Elk River, Elk City, Pierce, and Dixie.
* WHEN...From 4 PM this afternoon to 4 PM PST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the Thursday evening and Friday
morning commutes, especially over higher passes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.
&&
$$
URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
102 PM MST Thu Dec 4 2025
...PROLONGED SNOW EVENT...
.A plume of snow will continue to impacted north central Idaho into
west central and southwest Montana tonight. The snow activity will
decrease in intensity during the day on Friday, then a second plume
of precipitation will impact the region late Friday through Saturday.
MTZ006-052015-
/O.UPG.KMSO.WS.A.0010.251205T1200Z-251207T0000Z/
/O.NEW.KMSO.WS.W.0012.251205T0000Z-251207T0000Z/
Bitterroot/Sapphire Mountains-
102 PM MST Thu Dec 4 2025
...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 PM
MST SATURDAY...
* WHAT...Heavy snow expected. There is a likelihood of major winter
storm impacts. Total snow accumulations 1 to 5 inches in the
valleys and 8 to 15 inches in the higher terrain including Lolo
and Lost Trail Passes. Winds gusting as high as 40 mph on Friday.
* WHERE...Highway 93 Sula to Lost Trail Pass and Lolo Pass.
* WHEN...From 5 PM this afternoon to 5 PM MST Saturday.
* IMPACTS...Travel could be very difficult to impossible. The
hazardous conditions could impact the Thursday evening and Friday
morning commutes, especially over higher passes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If you must travel, keep an extra flashlight, food, and water in
your vehicle in case of an emergency. The latest road conditions for
the state you are calling from can be obtained by calling 5 1 1.
&&
$$
Winter Weather Advisory
URGENT - WINTER WEATHER MESSAGE
National Weather Service Boise ID
202 AM MST Fri Dec 5 2025
IDZ011-013-052200-
/O.CON.KBOI.WW.Y.0011.000000T0000Z-251206T0600Z/
West Central Mountains-Boise Mountains-
Including the cities of Big Creek, McCall, Cascade, Warm Lake,
Bear, Ola, Cuprum, Anderson Dam, Pine, and Prairie
202 AM MST Fri Dec 5 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO
11 PM MST FRIDAY...
* WHAT...Snow. Additional snow accumulations of up to 3 inches in
mountain valleys before mixing with or changing to rain this
afternoon. An additional 4 to 8 inches in the mountains above
6000 feet. Wind gusts of 30 to 40 mph develop later this evening
over higher mountains.
* WHERE...West Central Mountains and Boise Mountains zones.
* WHEN...Until 11 PM MST this evening.
* IMPACTS...Travel could be difficult, especially over higher
elevation passes. Locally heavy snowfall will limit
visibilities.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. The latest road
conditions can be obtained by calling 5 1 1.
&&
$$
For more information from the National Weather Service visit
weather.gov/boise
URGENT - WINTER WEATHER MESSAGE
National Weather Service Pocatello ID
351 PM MST Thu Dec 4 2025
IDZ072-073-051130-
/O.NEW.KPIH.WW.Y.0019.251205T0000Z-251206T1200Z/
Sawtooth/Stanley Basin-Sun Valley Region-
Including the cities of Galena, Sun Valley, Stanley, and Ketchum
351 PM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 AM MST SATURDAY...
* WHAT...Snow expected. Total snow accumulations between 2 and 6
inches with higher snow totals expected at and above pass level
with 7 to 10 inches of snow for Galena Summit. Very gusty winds
developing late Friday into Friday night.
* WHERE...Sawtooth/Stanley Basin and Sun Valley Region.
* WHEN...Until 5 AM MST Saturday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Thursday evening and Friday commutes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. Call 5 1 1 or visit
511.idaho.gov for the latest road conditions.
&&
$$
Visit weather.gov/pocatello for more information.
AM
URGENT - WINTER WEATHER MESSAGE
National Weather Service Missoula MT
102 PM MST Thu Dec 4 2025
...PROLONGED SNOW EVENT...
.A plume of snow will continue to impacted north central Idaho into
west central and southwest Montana tonight. The snow activity will
decrease in intensity during the day on Friday, then a second plume
of precipitation will impact the region late Friday through Saturday.
IDZ009-010-051800-
/O.NEW.KMSO.WW.Y.0046.251205T0000Z-251205T1800Z/
Western Lemhi County-Eastern Lemhi County-
102 PM MST Thu Dec 4 2025
...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11
AM MST FRIDAY...
* WHAT...Snow expected. There is a likelihood of minor to moderate
winter weather impacts. Total snow accumulations up to 3 inches in
the valleys and 4 to 9 inches in the higher terrain and mountain
passes.
* WHERE...Highway 28 Tendoy to Lone Pine, Lemhi Pass, Shoup, Bannock
Pass, Williams Creek Summit, Highway 93 Lost Trail Pass to
Gibbonsville, and Salmon.
* WHEN...From 5 PM this afternoon to 11 AM MST Friday.
* IMPACTS...Plan on slippery road conditions. The hazardous
conditions could impact the Thursday evening and Friday morning
commutes, especially over higher passes.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Slow down and use caution while traveling. The latest road
conditions for the state you are calling from can be obtained by
calling 5 1 1.
&&
$$
Wind Advisory
URGENT - WEATHER MESSAGE
National Weather Service Pendleton OR
1143 AM PST Thu Dec 4 2025
ORZ041-044-507-508-510-WAZ024-521-051500-
/O.NEW.KPDT.WI.Y.0029.251206T0000Z-251206T1800Z/
Eastern Columbia River Gorge of Oregon-Lower Columbia Basin of
Oregon-Foothills of the Northern Blue Mountains of Oregon-
Foothills of the Southern Blue Mountains of Oregon-North Central
Oregon-Eastern Columbia River Gorge of Washington-Simcoe
Highlands-
Including the cities of Hermiston, Maupin, Pendleton, Ione,
Boardman, Dufur, The Dalles, White Salmon, Pilot Rock, Athena,
Condon, Arlington, Goldendale, Bickleton, Fossil, Heppner, and
Moro
1143 AM PST Thu Dec 4 2025
...WIND ADVISORY IN EFFECT FROM 4 PM FRIDAY TO 10 AM PST SATURDAY...
* WHAT...West winds 20 to 30 mph with gusts up to 55 mph expected.
* WHERE...Eastern Columbia River Gorge of Oregon and Washington,
Foothills of the Blue Mountains of Oregon, Lower Columbia Basin of
Oregon, North Central Oregon, and Simcoe Highlands.
* WHEN...From 4 PM Friday to 10 AM PST Saturday.
* IMPACTS...Gusty winds will blow around unsecured objects. Tree
limbs could be blown down and a few power outages may result.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Winds this strong can make driving difficult, especially for high
profile vehicles. Use extra caution.
&&
$$
