Flash Flood in Lemhi County, Idaho

Flash Flood July 2, 2013 · Lemhi County, Idaho

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

A forest service employee reported flash flooding that pushed debris across Salmon River Rd. east of Spring Creek closing one lane. Doppler radar estimated 0.78 of rainfall 30 minutes ending at 4:30 pm MDT across the Spring Creek basin.

The wider storm

A large moist and hot ridge resided over much of the western third of the US mainland. Temperatures reached well over one hundred degrees in several places in the Salmon River Valley in Idaho. The atmospheric moisture levels were above normal combined with the heat and a weak upper level disturbance triggered slow moving thunderstorms across north-central Idaho. A few storms were able to produce over an inch of rainfall in spots.

Began near Shoup (45.4017, -114.2397).

Source: NOAA Storm Events Database, event 460385. Narratives are written by the National Weather Service forecast office that issued the report.

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