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Thunderstorm Wind in Sully County, South Dakota
Thunderstorm Wind July 14, 2025 · Sully County, South Dakota
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
The Sully County Sheriff reported multiple powerlines were downed by an estimated 100 mph thunderstorm wind gust west of Onida.
The wider storm
Scattered thunderstorms produced isolated strong winds and damage across central and north-central South Dakota during the evening of July 14th. A collapsing storm produced 82 mph winds measured by the Pierre Regional Airport Automated Surface Observing System, resulting in tree and vehicle damage on the east side of town. Another storm west of Onida would go on to topple multiple powerlines with an estimated 100 mph wind gust. Multiple reports of wind gusts of 50 to 70 mph were observed through the evening and overnight hours. As the thunderstorms departed, a second round of strong, non-thunderstorm winds followed the system overnight into July 15th.
Began near Clifton (44.7100, -100.2400).
Source: NOAA Storm Events Database, event 1263303. Narratives are written by the National Weather Service forecast office that issued the report.
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