Hail — Treasure, Montana

2021-07-06 · near Sarpy Jct, Treasure, Montana

Wider weather episode

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.

View location on OpenStreetMap → (45.9300, -107.0500)

Source: NOAA Storm Events Database, event_id 960103. Narrative written by the NWS forecast office that issued the report.