Hail in Flathead County, Montana

Hail May 28, 2026 · Flathead County, Montana

1.25 in

Hail diameter

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

What the National Weather Service wrote

A person located one mile west of Kalispell posted a photo with multiple hailstones placed on a ruler. This thunderstorm quickly developed severe hail within 15 minutes of forming south of Kalispell.

The wider storm

A highly unstable environment developed across western Montana, fueled by pooling moisture and steep lapse rates. Shortwave energy rotating around a broader upper-level trough provided the necessary lift for convective initiation which resulted in large hail. As storms moved into the Idaho Panhandle and interacted with the local terrain, they organized into two distinct quasi-linear convective systems, producing widespread severe wind gusts across Lincoln and Flathead Counties.

Began near Kalispell City Arpt (48.1725, -114.3283).

Source: NOAA Storm Events Database, event 1329763. Narratives are written by the National Weather Service forecast office that issued the report.

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