Winter Storm Warnings
December 21 2025
* WHAT...Periods of heavy snow. Total snow accumulations of 1 to 3
feet, mainly on south and west facing slopes. Winds gusting as high
as 40 mph.
* WHERE...Absaroka/Beartooth Mountains and Crazy Mountains.
* WHEN...Until 5 PM MST Monday.
* IMPACTS...Recreation in the high country will be impacted by heavy
accumulating snow and blowing snow.
* ADDITIONAL DETAILS...Avalanche danger will continue.
* WHAT...Rain and snow showers expected with areas of freezing rain
or drizzle possible. Total snow accumulations up to one inch and
ice accumulations around a light glaze. Winds gusting as high as 30
mph.
* WHERE...Portions of central and south central Montana.
* WHEN...From 2 PM this afternoon to 5 AM MST Monday.
* IMPACTS...Roads, and especially bridges and overpasses, could
become slick and hazardous.
* ADDITIONAL DETAILS...Motorists along I-90 around the Big Timber
area, and along US-191 from Big Timber to Harlowton, should be
alert for sudden changes in driving conditions and slick roads late
today through the evening.
* WHAT...Snow expected. There is a likelihood of minor winter
weather impacts. Total snow accumulations 6 to 10 inches in the
high terrain, including Lost Trail Pass, and 1 to 3 inches in the
valleys. Winds gusting 35 to as 45 mph in the terrain.
* WHERE...Highway 28 Tendoy to Lone Pine, Highway 93 Lost Trail Pass
to Gibbonsville, Shoup, Bannock Pass, Lemhi Pass, Williams Creek
Summit, and Salmon.
* WHEN...Until 9 AM MST Monday.
* IMPACTS...Winter traveling conditions. For MINOR winter weather
impacts, expect a few inconveniences to normal activities. Use
caution while driving. The hazardous conditions could impact the
Monday morning commute, especially over higher passes. Gusty winds
could bring down tree branches.
* ADDITIONAL DETAILS...Snow levels are expected to rise today with
valleys, including Salmon, switching to a wintry mix or rain.
Should snow levels rise slower than forecast, an additional 1 to 3
inches of snow is possible.
* WHAT...Snow expected. There is a likelihood of minor winter
weather impacts. Total snow accumulations 5 to 10 inches.
* WHERE...Highway 93 Sula to Lost Trail Pass and Lolo Pass.
* WHEN...From 9 AM this morning to 9 AM MST Monday.
* IMPACTS...Winter traveling conditions. For MINOR winter weather
impacts, expect a few inconveniences to normal activities. Use
caution while driving. The hazardous conditions could impact the
Monday morning commute, especially over higher passes.
* WHAT...Snow and expected. Total snow accumulations 1 to 4 inches
over the valleys and 4 to 10 inches at and above pass level. The
snow may mix with light freezing rain or drizzle this evening and
tonight with ice accumulations up to a glaze. Winds may gust as
high as 40 mph at times.
* WHERE...Gallatin and Madison County Mountains and Centennial
Mountains and Northwest Beaverhead County.
* WHEN...Until 9 AM MST Monday.
* IMPACTS...Plan for winter driving conditions. Sidewalks and other
surfaces may become icy and slippery in areas that observe
freezing rain or drizzle.
