Flash Flood in Boise County, Idaho

Flash Flood June 11, 2025 · Boise 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 official reported that Forest Service Road 555 (Scott Mtn Rd) was washed out as a result of a stream of water ran over the road. The radar estimated rainfall total was 0.3 inches, with a maximum estimated rainfall rate of 2 inches per hour. Timing was estimated from peak hydrophobic unit flow.

The wider storm

On June 11th, a shortwave trough crossed across southwest Idaho aiding in thunderstorm development. RAP Mesoscale Analysis showed precipitable water values between 0.8 - 1 inch, around the climatological 95th percentile. With this moisture, heavy rain over burn scars was a primary hazard with storms that developed.

Began near Lowman (44.1661, -115.7259).

Source: NOAA Storm Events Database, event 1274985. Narratives are written by the National Weather Service forecast office that issued the report.

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