Hail in Treasure County, Montana

Hail July 6, 2021 · Treasure County, Montana

1 in

Hail diameter

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

The wider storm

Easterly to southeasterly near surface flow, to the cool side of a zone of stronger differential surface heating and deeper boundary-layer mixing to the east of the higher terrain, resulted in sufficient boundary-layer moisture to contribute to CAPE

on the order of 1000-1500 J/kg. In addition, a belt of 40+kt northwesterly flow around

500mb resulted in strong deep-layer shear. As a result, numerous severe thunderstorms producing large hail developed across portions of the Billings Forecast Area.

Began near Sarpy Jct (45.9300, -107.0500).

Source: NOAA Storm Events Database, event 960103. Narratives are written by the National Weather Service forecast office that issued the report.

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