winterstormwarning.com

Winter Storm Warning, Montana

Severe

Gusts up to 40 mph, another up to 8 inches of snow. The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages.

Ended Friday, December 19, 2025.

Issued
Expires
Updated

Places in this warning

How much

Snow across the area
Another up to 8 inches
Wind gusts
Up to 40 mph

Map

Map of Montana with this warning The Winter Storm Warning covers Sula. I-15I-90I-115US 287US 12SulaIDAHOMONTANA20 mi I-15I-90I-115US 287SulaIDAHOMONTANA25 mi I-15I-90US 12SulaIDAHOMONTANA50 mi I-15I-90SulaIDAHOMONTANA50 mi
  • This warning
  • Interstates
  • US highways
Alert area: National Weather Service. Borders and highways: U.S. Census Bureau. Lakes, rivers and other countries: Natural Earth. Open this area in OpenStreetMap

Details from the National Weather Service

What
Moderate to heavy snow will continue through at least the rest of the day. There is a likelihood of developing or ongoing moderate to major winter weather impacts due to snow and wind gusts up to 40 mph creating reduced visibility. Additional snow accumulations up to 8 inches.
Where
Highway 93 Sula to Lost Trail Pass and Lolo Pass.
When
Until 5 in the evening this afternoon.
Impacts
The strong winds and weight of snow on tree limbs may down power lines and could cause sporadic power outages. Winter traveling conditions. For MAJOR winter weather impacts, expect considerable disruptions to normal activities. Dangerous or impossible traveling conditions. Avoid travel in the impacted areas if possible. Widespread closures and disruptions to infrastructure may occur. The hazardous conditions could impact the Friday evening commute, especially over higher passes.

Updates

  1. Snow totals lowered from 8 to 14 inches to up to 8 inches. December 19, 2025
  2. Reissued with no change to the times or amounts. December 18, 2025
  3. Replaces the Winter Weather Advisory. December 18, 2025