Thunderstorm Wind in Ravalli County, Montana

Thunderstorm Wind July 15, 2017 · Ravalli County, Montana

60 mph

Estimated gust (52 kt)

$10K

Damage as recorded

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

What the National Weather Service wrote

Multiple trees fell due to the severe wind in the Florence area with up to 6 inch diameter bases. One large tree fell onto a house and broke the sky light. Another tree hit a power line on Ambrose Creek causing a fire. Over three thousand customers were without power for four hours after the thunderstorm went through.

The wider storm

An upper level wave tracked up from the Clearwater Mountains of Idaho towards the Seeley Lake area and initiated thunderstorms thanks to warmer than normal temperatures in the region. As these storms tracked over the Bitterroot and Clark Fork Valleys, they produced damaging winds and power outages. Also, a thunderstorm produced torrential rain and subsequent flash-flooding to Anaconda in southwestern Montana.

Began near Florence (46.6300, -114.0800).

Source: NOAA Storm Events Database, event 705257. Narratives are written by the National Weather Service forecast office that issued the report.

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