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Hail in Union County, South Dakota
Hail June 2, 2025 · Union County, South Dakota
Where the report was made, with tornadoes recorded within 15 miles over the years.
What the National Weather Service wrote
Ping pong to golf ball size hail occurred between mile markers 19 and 22 on Interstate 29. A semi truck ran into another semi truck in the adjoining lane and forced it off the road due to poor visibility during hail, wind, and heavy rain.
The wider storm
Scattered strong to severe thunderstorms developed late afternoon along a slow-moving frontal boundary. Even with fairly weak deep-layer shear, strong instability resulted in large hail. Drier air and advancing cold pools later in development produced spotty damaging winds. High moisture content and slowly progressing storms also produced some locally heavy rainfall with rates briefly from 3 to 5 inches per hour.
A particularly intense and long-lived supercell developed near Vermillion and tracked southeast, generating hail up to golf ball size and a swath of damaging winds along Burbank Road up to 85 mph.
Began near Elk Pt (42.7200, -96.7100).
Source: NOAA Storm Events Database, event 1278138. Narratives are written by the National Weather Service forecast office that issued the report.
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