Extreme Cold/Wind Chill — Big Belt, Bridger and Castle Mountains, Montana

2023-02-23 to 2023-02-24 · Big Belt, Bridger and Castle Mountains, Montana

Event narrative

Two sensors measured wind chills of -40 F or less, including Mesonet station MTDPC Deep Creek Pass and MTBZH Bozeman Pass. THe minimum wind chill observed was at Bozeman Pass and was -44 F.

Wider weather episode

After loss of diurnal heating during the day on the 23rd of February, another round of frigid wind chills took place before Chinook winds were able to warm most areas up later on the 24th.

Source: NOAA Storm Events Database, event_id 1073988. Narrative written by the NWS forecast office that issued the report.