Winter Storm — Eastern Lemhi County, Idaho

2025-02-02 to 2025-02-05 · Eastern Lemhi County, Idaho

Event narrative

Heavy snow fell initially, with up to 10 inches of accumulation near Gibbonsville and 8 inches in Salmon. During the day, melting snow caused water to accumulate on roadways, which turned to ice after dark due to ground temperatures remaining well below freezing. A weather spotter northeast of Carmen reported that all side streets were icy. He measured 7 inches of snow with 0.55 inches of water between February 2-3. Lemhi County also reported icing on county roads. Lost Trail Pass recorded 24 inches of snow in the 48-hour period ending at 0500MST on February 5. A snow squall produced wind gusts up to 45 mph and heavy snow around 1000MST on the 5th, impacting northern Lemhi County.

Wider weather episode

A winter storm developed as moisture from the southwest overran an arctic cold front pushing in from the northeast, resulting in significant impacts across north-central Idaho.

Source: NOAA Storm Events Database, event_id 1237529. Narrative written by the NWS forecast office that issued the report.