Cold/Wind Chill — Little Rocky Mountains, Montana

2022-12-20 to 2022-12-23 · Little Rocky Mountains, Montana

Event narrative

For multiple sites across the Little Rocky Mountains, temperatures in the teens and 20s below zero and breezy winds created intermittent periods of wind chills of -40 or worse from the late night of the 20th into the morning of the 23rd. The peak wind chill of -61 was recorded at 8:25 AM and 9:55 AM on the 21st at the FW7047 Landusky mesonet site (F7047).

Wider weather episode

An Arctic Air Mass brought the coldest temperatures that northeast Montana has seen in 3 years. Wind chills with this cold air outbreak measured lower than -60 degrees in places.

Source: NOAA Storm Events Database, event_id 1067073. Narrative written by the NWS forecast office that issued the report.