Thunderstorm Wind — Powell, Montana

2013-07-17 · near Avon, Powell, Montana

Event narrative

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.

Wider weather episode

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.

View location on OpenStreetMap → (46.6724, -112.5800)

Source: NOAA Storm Events Database, event_id 471845. Narrative written by the NWS forecast office that issued the report.