Montana Winter Storm Warning | Effective 04/21/2026 22:56

Headline: 
Winter Storm Warning issued April 21 at 11:56PM MDT until April 23 at 6:00PM MDT by NWS Great Falls MT
Event: 
Winter Storm Warning
Urgency: 
Expected
Effective: 
April 21, 2026 - 10:56pm
Expires: 
April 22, 2026 - 2:00pm
Description: 
* WHAT...Heavy wet snow expected. Total snow accumulations between 5 and 12 inches, with higher amounts over the mountain peaks. Winds gusting as high as 40 mph. * WHERE...Gallatin and Madison County Mountains and Centennial Mountains. * WHEN...From 6 PM Wednesday to 6 PM MDT Thursday. * IMPACTS...Travel could be very difficult and tire chains may be required for some vehicles. Those in the backcountry should ensure they are prepared for dangerous conditions. * ADDITIONAL DETAILS...The heavy, wet snow may cause instances of power outages and or tree damage.
Instruction: 
If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions can be obtained by calling 5 1 1 or visiting the MDT Road Report website. To see a graphical representation of the degree of stress on young livestock please visit our webpage and select Local Programs then Cold Air Advisory for Newborn Livestock.
Area Description: 
Gallatin and Madison County Mountains and Centennial Mountains
Forcast Office: 
NWS Great Falls MT