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Winter Storm in Teton & Gros Ventre Mountains, Wyoming

Winter Storm October 26, 2025 – October 27, 2025 · Teton & Gros Ventre Mountains, Wyoming

What the National Weather Service wrote

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

The wider storm

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 1298200. Narratives are written by the National Weather Service forecast office that issued the report.

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