Extreme Cold/Wind Chill — Upper Blackfoot and Macdonald Pass, Montana

2022-12-20 to 2022-12-22 · Upper Blackfoot and Macdonald Pass, Montana

Event narrative

Multiple sensors measured wind chills of less than -40 F, including the DOT sensor on MacDonald Pass (MTMDP) which measured a minimum wind chill of -59 F.

Wider weather episode

Arctic air dropped south from Canada the week before Christmas bringing widespread frigid wind chills to the region. The arctic front reported in strong wind gusts and blizzard conditions in Southwest Montana. Additional areas of light to moderate snow affected much of the region.

Source: NOAA Storm Events Database, event_id 1070176. Narrative written by the NWS forecast office that issued the report.