Extreme Cold/Wind Chill — Eastern Toole and Liberty, Montana

2025-12-27 · Eastern Toole and Liberty, Montana

Event narrative

Mesonet station GW5555 Grassy Butte 3SE measured a -36F wind chill.

Wider weather episode

A potent shortwave within a larger scale trough overspread the region late evening on the 26th into the 27th. This resulted in a cold front moving across the region, mostly during the morning of the 27th. Strong gusts and a few snow squalls accompanied this front as it progressed through the region.

Behind the cold front there were a few instances of extreme cold across the Hi-Line (Temperatures or wind chills of -35F or less).

Source: NOAA Storm Events Database, event_id 1306758. Narrative written by the NWS forecast office that issued the report.