Flash Flood in Granite County, Montana

Flash Flood August 9, 2013 · Granite County, Montana

$5K

Damage as recorded

$20K

Crop damage

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

What the National Weather Service wrote

A slow moving wet thunderstorm dumped at least 1 of rainfall in one hour just southeast of Drummond. A rancher experienced a 5 foot wall of fast moving water that moved down their driveway. The fast flowing water laden with pea-sized hail and mud severely damaged grain & alfalfa crops, irrigation sprinklers and a fence. They said it was the worst flooding in at least 20 years.

The wider storm

A wave of monsoon moisture tracked south to north across western Montana on August 9, 2013. Embedded multicellular thunderstorms produced very heavy rain with flash flooding reported near Drummond and gusty winds that brought tree damage to portions of the Bitterroot and Missoula Valleys.

Began near New Chicago (46.6209, -113.1115).

Source: NOAA Storm Events Database, event 472152. Narratives are written by the National Weather Service forecast office that issued the report.

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