Thunderstorm Wind in Gregory County, South Dakota

Thunderstorm Wind August 13, 2025 · Gregory County, South Dakota

60 mph

Measured gust (52 kt)

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

What the National Weather Service wrote

Thunderstorm winds, which gusted as high as 60 mph, were measured by South Dakota Mesonet station GGMS2 Gregory 7SSW.

The wider storm

Thunderstorms initiated along the higher terrain of western South Dakota and moved eastward through a stout instability axis from 2000-2500 J/kg MUCAPE and deep-layer shear up to 40 knots. However, the storms quickly outran the better parameters and weakened moving into southeast South Dakota, but not before linear storms produced areas of 60 to 65 mph wind across Gregory County. Additional storms developed several hours later during the early morning hours with isolated wind damage southeast of Huron.

Began near Paxton (43.1400, -99.4900).

Source: NOAA Storm Events Database, event 1290505. Narratives are written by the National Weather Service forecast office that issued the report.

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