Winter Weather Advisory in Big Belt, Bridger and Castle Mountains

Winter Weather Advisory issued December 11 at 3:03AM MST until December 11 at 11:00PM MST by NWS Great Falls MT

• Event Start: 2025-12-11T09:00:00-07:00
• Event End: 2025-12-11T23:00:00-07:00
• Event Certainty: Likely
• Event Severity: Moderate

Event Description

• WHAT: Snow expected. Total snow accumulations up to two inches. Winds gusting as high as 55 mph.
• WHERE: Big Belt, Bridger and Castle Mountains, Gates of the Mountains, Meagher County Valleys, and Upper Blackfoot and MacDonald Pass.
• WHEN: From 9 AM this morning to 11 PM MST this evening.
• IMPACTS: Roads, and especially bridges and overpasses, will likely become slick and hazardous.

Event Instructions

Slow down and use caution while traveling. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website.