High Wind in Northeast Bighorn Mountains, Wyoming

Estimated due to adjacent Pryor Mountains gusting to 79 mph at Wild Horse raws.

On December 17, 2025, the entire region experienced a long-duration, high-impact wind event resulting in widespread damage and impacts. While strong winds are a normal occurrence across this region, this event stands out due to its spatial extent and prolonged period of impact, with many locations experiencing high sustained winds and wind gusts for 6 or more hours. Damage reported as a result of this weather system includes numerous, downed trees and power lines. Widespread severe driving conditions were reported with multiple road closures as a result of blown-over semis and trailers and fallen debris. Numerous weather observation stations across the reservation recorded wind gusts over 50mph for several hours. Strong winds lingered into the 18th.