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Flood — Day, SD

Aug 13, 2025

Two clusters of storms would move across the forecast area on the 13th into the early morning hours of the 14th. The day started with an isolated stronger storm generating 1 inch hail 6 miles north northeast of Lowry. That cluster would continue to move east and intensify, with 1.5 inch hail observed 8 miles east of Pierpont. These storms would damage siding and crops around Pierpont, with additional thunderstorm wind damage to trees in the town of Roslyn. ||Another cluster of storms would move

Source: NOAA National Weather Service Storm Events Database (event 1290362). Narrative written by NWS staff at the time of the event.

Flood Risk Context for Day, SD

This event is one of many recorded floods in Day County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.

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