Hail — Jefferson, Montana

2019-07-16 · near Cardwell, Jefferson, Montana

Event narrative

Trained spotter reports quarter sized hail falling and covering the ground near Cardwell.

Wider weather episode

A Pacific Trough approached from the west and supplied sufficient wind shear, lift, moisture, and instability for the development of strong to severe thunderstorms over southwest Montana. Effective shear values fell in the 30 to 40 knot range, while there was about .75 inches of precipitable water in the area. The first wave of storms developed by early afternoon and produced wind gusts up to 80 mph in Gallatin County. Thunderstorms continued to develop in the late afternoon and evening hours, which produced quarter sized hail in Jefferson and Beaverhead Counties.

View location on OpenStreetMap → (45.8500, -111.9916)

Source: NOAA Storm Events Database, event_id 841894. Narrative written by the NWS forecast office that issued the report.