Hail in McCook County, South Dakota

Hail May 24, 2026 · McCook County, South Dakota

1.5 in

Hail diameter

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

The wider storm

A weak wave in northwest flow aloft enhanced the low-level jet into southeast South Dakota with moisture and better deep-layer shear arriving by late day near a weak frontal boundary. With mixed-layer instability from 1500-2200 J/kg and marginally supportive deep layer shear of 40-45 kts, isolated supercells developed with mainly hail from stronger cells up to 2 inches in diameter.

Began near Canistota (43.6000, -97.1800).

Source: NOAA Storm Events Database, event 1344009. Narratives are written by the National Weather Service forecast office that issued the report.

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