Winter Storm Watch in Southern Rocky Mountain Front

Winter Storm Watch issued December 11 at 3:03AM MST until December 13 at 5:00AM MST by NWS Great Falls MT

• Event Start: 2025-12-12T00:00:00-07:00
• Event End: 2025-12-13T05:00:00-07:00
• Event Certainty: Possible
• Event Severity: Severe

Event Description

• WHAT: For the Winter Weather Advisory, snow expected. Total snow accumulations 1 to 3 inches. Winds gusting as high as 60 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 5 and 10 inches possible. Winds could gust as high as 45 mph.
• WHERE: Southern Rocky Mountain Front.
• WHEN: For the Winter Weather Advisory, from 9 AM this morning to 11 PM MST this evening. For the Winter Storm Watch, from late tonight through late Friday night.
• IMPACTS: Roads, and especially bridges and overpasses, will likely become slick and hazardous. Tire chains may be required for some vehicles if traveling through mountain passes. Strong winds could cause tree damage.

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.

Winter Weather Advisory in Southern Rocky Mountain Front

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: For the Winter Weather Advisory, snow expected. Total snow accumulations 1 to 3 inches. Winds gusting as high as 60 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations between 5 and 10 inches possible. Winds could gust as high as 45 mph.
• WHERE: Southern Rocky Mountain Front.
• WHEN: For the Winter Weather Advisory, from 9 AM this morning to 11 PM MST this evening. For the Winter Storm Watch, from late tonight through late Friday night.
• IMPACTS: Roads, and especially bridges and overpasses, will likely become slick and hazardous. Tire chains may be required for some vehicles if traveling through mountain passes. Strong winds could cause tree damage.

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.