Thunderstorm Wind in Powell County, Montana

Thunderstorm Wind July 17, 2013 · Powell County, Montana

60 mph

Estimated gust (52 kt)

$30K

Damage as recorded

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

What the National Weather Service wrote

A very large right-moving supercell tracked east-northeast from Goldcreek to north of Avon bringing with it large hail, severe winds and heavy rain. A rancher 5 miles north of Avon reported a totaled barn, several trees that were either uprooted or broken in half. One of those trees uprooted was a 24 cottonwood.

The wider storm

A mid-level southwest 50 knot jet maximum combined with high moisture and very warm temperatures provided the prime environment for strong supercells. These cells brought both severe wind and hail.

Began near Avon (46.6724, -112.5800).

Source: NOAA Storm Events Database, event 471845. Narratives are written by the National Weather Service forecast office that issued the report.

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