Winter Storm — Bighorn Mountains West, Wyoming

2015-02-20 to 2015-02-21 · Bighorn Mountains West, Wyoming

Event narrative

The SNOTEL site at Middle Powder River estimated 12 inches of new snow.

Wider weather episode

An upper low over central Canada provided for a 24 to 36-hour stretch of unstable northwest flow aloft across Wyoming. This flow pattern favored heavy snow on the west side of the Bighorn Mountains and in the Nowood River Valley from Ten Sleep south to around Big Trails. Snowfall in these areas topped one foot with other amounts of about 8 to 10 inches. Heavy snow of 6 to 8 inches also fell in Lander while the adjacent foothills of the Wind River Mountains received 12 to 14 inches.

Source: NOAA Storm Events Database, event_id 554042. Narrative written by the NWS forecast office that issued the report.