Winter Weather — Eastern Lemhi County, Idaho

2025-12-04 to 2025-12-06 · Eastern Lemhi County, Idaho

Event narrative

Snowfall totals ranged from 1.5 inches in Salmon, to 6.7 inches in Gibbonsville, to over a foot of snow at Lost Trail Pass. Snowfall changed to rain in the Salmon area at night while low temperatures were below freezing which implies black ice issues.

Wider weather episode

A potent atmospheric river moved into the Northern Rockies between December 4 and 7, delivering significant mountain snowfall.

Source: NOAA Storm Events Database, event_id 1304368. Narrative written by the NWS forecast office that issued the report.