Upper level troughing propelled a Canadian cold front through the region, leaving a northerly to northwesterly upslope flow in its wake. This upslope enhancement led to isolated instances of heavy snow.
Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS TFX wrote it up.
Upper level troughing propelled a Canadian cold front through the region, leaving a northerly to northwesterly upslope flow in its wake. This upslope enhancement led to isolated instances of heavy snow.
The national radar mosaic for the moment the first event began.
1 heavy snow. Local standard time, as filed.
Trained spotter reported 6.5 inches storm total snow 5 miles west of Hilger. Start, criteria, and end time are estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Montana in 2025Every state in 2025This day in weather historyWarnings in Montana, December 2025
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1298936.