Thunderstorm Wind — Walworth, South Dakota
2025-07-21 · near Sitka, Walworth, South Dakota
55 MG
Magnitude
Event narrative
A peak wind gust of 63 mph was observed by a South Dakota State University mesonet station in the town of Glenham.
Wider weather episode
A line of storms developed and moved east across the northern tier of South Dakota, producing intermittently strong winds and some large hail.
View location on OpenStreetMap → (45.4900, -100.2200)
Source: NOAA Storm Events Database, event_id 1281091. Narrative written by the NWS forecast office that issued the report.