Debris Flow — Lemhi, Idaho

2021-08-01 to 2021-08-02 · near Shoup, Lemhi, Idaho

Event narrative

Salmon-Challis National Forest officials reported a 30 feet wide by three feet deep sand and dirt debris flow across Salmon River Road, 1.5 miles west of Panther Creek. Another debris flow was reported from the Dutch Oven Creek drainage and was three feet wide, by four feet deep, including two to three boulders. The Salmon River Road was impassable from Panther Creek to Dutch Oven Creek through the morning hours of August 2nd. The Skull Gulch RAWS, located a few miles northwest of Panther Creek, reported 0.24 inches of rain from 1500 to 1600.

Wider weather episode

Monsoonal subtropical moisture set the stage for thunderstorms to produce heavy rainfall across portions of the central Idaho.

View location on OpenStreetMap → (45.2995, -114.4227)

Source: NOAA Storm Events Database, event_id 976612. Narrative written by the NWS forecast office that issued the report.