Winter Storm — Teton & Gros Ventre Mountains, Wyoming

2025-10-26 to 2025-10-27 · Teton & Gros Ventre Mountains, Wyoming

Event narrative

At the Grand Targhee SNOTEL site, 12 inches of new snow fell.

Wider weather episode

A passing longwave trough and favorable upslope flow brought heavy snow to the western Wyoming mountains with up to around a foot of new accumulation for many ranges. In Yellowstone National Park, the snow produced icy roads and led to over 30 traffic incidents, resulting in the closure of all roads in the Park.

Source: NOAA Storm Events Database, event_id 1298200. Narrative written by the NWS forecast office that issued the report.