Montana - United States   2026-04-01   Wednesday   46.62N, -111.92W

Helena Valley Southeast

Montana - United States
2026-04-01

Winter Weather Advisory issued March 31 at 10:48PM MDT until April 3 at 12:00PM MDT by NWS Great Falls MT

Issue date: 2026-04-01T04:48+00:00

* WHAT...Snow expected. Total snow accumulations between 4 and 8 inches at and below pass level, with higher amounts above pass level. Winds gusting as high as 35 mph. * WHERE...Big Belt, Bridger and Castle Mountains. * WHEN...From 9 AM Thursday to noon MDT Friday. * IMPACTS...Tire chains may be required for some vehicles if traveling through mountain passes. * ADDITIONAL DETAILS...The wet variety of snow may pose snow load impacts to infrastructure.

Winter Weather Advisory issued March 31 at 10:48PM MDT until April 3 at 6:00AM MDT by NWS Great Falls MT

Issue date: 2026-04-01T04:48+00:00

* WHAT...Snow expected. Total snow accumulations between 3 and 8 inches. Winds gusting as high as 35 mph. * WHERE...Elkhorn and Boulder Mountains, Upper Blackfoot and MacDonald Pass, Southern Rocky Mountain Front, and Northwest Beaverhead County. * WHEN...From 6 AM Thursday to 6 AM MDT Friday. * IMPACTS...Tire chains may be required for some vehicles if traveling through mountain passes. * ADDITIONAL DETAILS...The wet variety of snow may pose snow load impacts to infrastructure.