Winter Storm Warning Issued for Upper Blackfoot and MacDonald Pass Through Friday

Alert Details

The National Weather Service in Great Falls, MT, has issued a Winter Storm Warning for the Upper Blackfoot and MacDonald Pass regions. This alert is effective from 6:00 PM MDT this evening through 12:00 PM MDT Friday, March 13, 2026. A Winter Storm Warning indicates an 80% or greater chance of impactful winter weather conditions.

Affected Areas

The warning specifically covers the Upper Blackfoot and MacDonald Pass areas (MTZ315), including the Upper Blackfoot Valley, the Lincoln area, Flesher Pass, and MacDonald Pass.

What You Should Do

Residents and travelers are advised to take the following precautions:

• If travel is necessary, keep an extra flashlight, food, and water in your vehicle in case of an emergency.
• Be prepared for difficult travel conditions where tire chains may be required for some vehicles.
• Monitor the latest road conditions by calling 5 1 1 or visiting the MDT Road Report website.

Expected Conditions

• Snow Accumulation: Total snow accumulations are expected to reach between 3 and 6 inches in the Upper Blackfoot Valley and Lincoln area. Higher elevations, including Flesher Pass and MacDonald Pass, may see between 6 and 12 inches.
• Wind: Wind gusts are forecast to reach as high as 65 mph.
• Visibility: Significant visibility reductions are expected on Thursday due to blowing snow.
• Travel Impacts: Travel could be very difficult due to the combination of heavy snow and high winds.

Timeline

• Onset: The warning begins at 6:00 PM MDT on Wednesday, March 11, 2026.
• Duration: Hazardous conditions are expected to persist through Thursday.
• Expiration: The warning is scheduled to expire at 12:00 PM MDT on Friday, March 13, 2026.