Hail in Gregory County, South Dakota

Hail August 3, 2025 · Gregory County, South Dakota

1 in

Hail diameter

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

The wider storm

Relatively weak shear, less than 1500 J/kg MUCAPE, and deep layer shear less than 30 knots led to slow-moving storms with limited longevity. One stronger storm along a surface boundary west of the Missouri River dropped large hail up to quarter size across Gregory County.

Began near Gregory (43.2400, -99.4300).

Source: NOAA Storm Events Database, event 1290350. Narratives are written by the National Weather Service forecast office that issued the report.

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