Debris Flow in Lemhi County, Idaho
Debris Flow August 1, 2021 – August 2, 2021 · Lemhi County, Idaho
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
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.
The wider storm
Monsoonal subtropical moisture set the stage for thunderstorms to produce heavy rainfall across portions of the central Idaho.
Began near Shoup (45.2995, -114.4227).
Source: NOAA Storm Events Database, event 976612. Narratives are written by the National Weather Service forecast office that issued the report.
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