Hail in Treasure County, Montana

Hail July 6, 2021 · Treasure County, Montana

1.75 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 Bighorn (46.1900, -107.4400).

Source: NOAA Storm Events Database, event 960099. Narratives are written by the National Weather Service forecast office that issued the report.

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