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Thunderstorm Wind in Walworth County, South Dakota
Thunderstorm Wind September 14, 2025 · Walworth County, South Dakota
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
The Walworth County Emergency Manager estimated the wind speed to top out between 60 to 70 mph as the storm passed through after the ASOS lost power.
The wider storm
Several strong storms spread between north central and northeast South Dakota producing high winds and tornadoes. A peak gust of 70 mph was measured at the Mobridge Regional Airport and a 68 mph gust was measured on a personal weather station 3 miles north-northwest of Lake Cochrane. Two tornadoes developed; one tracked approximately 4 miles causing damage to farmsteads and vehicles, while the second was a brief touchdown with no observed damage.
Began near (y26)mobridge Arpt (45.5400, -100.4100).
Other tornadoes from the same storm system
2 more tornadoes the National Weather Service filed under this storm episode.
Source: NOAA Storm Events Database, event 1283634. Narratives are written by the National Weather Service forecast office that issued the report.
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