Flash Flood in Lewis and Clark County, Montana

Flash Flood September 11, 2024 · Lewis and Clark County, Montana

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

What the National Weather Service wrote

Lewis and Clark County emergency management reported that Jimtown rd was closed due to a water/debris flow flash flood originating from the Horse Gulch burn scar.

Broadcast media report: Although 12 campers were stranded as a result of the flash flood, no one was injured, and no property was destroyed in the Riverside Campground area near the Missouri River.

The wider storm

An upper level trough passed across the Northern Rockies September 11, which allowed for numerous thunderstorms to develop in the afternoon. Thermodynamic and kinematic ingredients were sufficient for a few strong thunderstorms, mostly across Southwest Montana. Additionally, a series of thunderstorms moved across the Horse Gulch burn scar, which resulted in flash flooding.

Began near Canyon Ferry (46.6700, -111.7300).

Source: NOAA Storm Events Database, event 1211448. Narratives are written by the National Weather Service forecast office that issued the report.

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