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Severe thunderstorms produce large hail and hurricane-force wind gusts across eastern South Dakota

By Scott Bachmeier •

1-minute GOES-19 Clean Infrared Window (10.3 µm) images, with time-matched (+/- 3 minutes) SPC Storm Reports plotted in white, from 2330 UTC on 05 August to 0507 UTC on 06 August [click to play animated GIF | MP4]

1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Clean Infrared Window (10.3 µm) images (above) showed a cluster of thunderstorms that eventually congealed into a large Mesoscale Convective System, producing a tornado, hail as large as 2.75″ in diameter and wind gusts as high as 99 mph (SPC Storm Reports) across parts of eastern South Dakota on 05 August 2025. Frequent pulses of overshooting tops were apparent with these thunderstorms.

Categories: GOES-19, Severe convection