Extreme Cold/Wind Chill — Niobrara County, Wyoming

2025-01-20 · Niobrara County, Wyoming

Event narrative

Overnight low temperatures ranged from -10 F to -15 F across Niobrara County from 1/20 into 1/21, with daytime highs remaining near 0 F during the afternoon on 1/20. The combination of cold temperatures and gusty winds resulted in a prolonged period of extreme wind chills under -30 F. Minimum observed wind chill values reached -38 F at the Lusk UPR site (1 NNW Lusk) at 3:37AM MST on 1/20.

Wider weather episode

A strong arctic front brought prolonged frigid temepratures to southeast Wyoming Friday, January 17 through the early morning of Tuesday, January 21. The coldest temperatures occured Sunday night and Monday night.

Source: NOAA Storm Events Database, event_id 1224093. Narrative written by the NWS forecast office that issued the report.