A mid-level disturbance rotated through cyclonic northwest flow established over the Northern Plains. Scattered storms developed along a weak surface convergence boundary with minimal MLCAPE around 500 J/kg during the afternoon, but managed to yield an isolated damaging wind gust in southeast South Dakota and isolated large hail in southwest Minnesota.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS FSD wrote it up.
A mid-level disturbance rotated through cyclonic northwest flow established over the Northern Plains. Scattered storms developed along a weak surface convergence boundary with minimal MLCAPE around 500 J/kg during the afternoon, but managed to yield an isolated damaging wind gust in southeast South Dakota and isolated large hail in southwest Minnesota.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Sioux Falls, SD wrote its last area forecast discussion before the first event at Jun 15, 11:58 AM CST, 3 hours 10 minutes earlier.
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</html>The Aberdeen radar (KABR), 111 km away, was scanning. The volume nearest the first event began at 21:05 UTC.
1 thunderstorm wind. Local standard time, as filed.
Thunderstorm wind gust was measured by the South Dakota Road Weather Information System site north of Wolsey.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in South Dakota in 2026Every state in 2026This day in weather historyWarnings in South Dakota, June 2026
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1346237.