Debris Flow in Ravalli County, Montana

Debris Flow July 30, 2025 · Ravalli County, Montana

$500

Damage as recorded

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

What the National Weather Service wrote

Radar-estimated rainfall of 1.77 inches fell in one and a half hours and triggered a debris flow that covered the East Fork Road, east of Sula, at Mile-marker 4.

The wider storm

Slow-moving thunderstorms brought torrential rainfall and triggered subsequent debris flows across parts of southwest Montana. The event was exacerbated by a deep layer of atmospheric moisture, with precipitable water values measured at nearly one inch, leading to highly efficient and impactful rainfall.

Began near Sula (45.8563, -113.9325).

Source: NOAA Storm Events Database, event 1286097. Narratives are written by the National Weather Service forecast office that issued the report.

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