South Dakota, 2025

Hail and Damaging Wind in South Dakota, September 2, 2025

September 2, 2025 · NWS FSD · 2 events in 2 counties and zones

A strong mid-level wave crashed southeastward toward the Great Lakes and drove a sharp southward moving cold front through the area during the evening and overnight of September 2-3, 2025. Scattered late afternoon and evening thunderstorms developed within the environment of around 1500 J/kg MUCAPE and 25 knots of deep-layer shear, with the strongest storms producing quarter size hail and some…

Where it happened

Every event with a place to put it. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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.

What happened

The episode as NWS FSD wrote it up.

A strong mid-level wave crashed southeastward toward the Great Lakes and drove a sharp southward moving cold front through the area during the evening and overnight of September 2-3, 2025. Scattered late afternoon and evening thunderstorms developed within the environment of around 1500 J/kg MUCAPE and 25 knots of deep-layer shear, with the strongest storms producing quarter size hail and some minor wind damage.

What forecasters said that day

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 Sep 2, 5:03 PM CST, 1 hour 12 minutes earlier.

Area forecast discussion, Sep 2, 5:03 PM CST, 1 hour 12 minutes before
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Hazardous weather outlook, Sep 2, 1:39 PM CST, 4 hours 36 minutes before
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The radar

The Sioux Falls radar (KFSD), 133 km away, was scanning. The volume nearest the first event began at 00:17 UTC.

Open the radar archive at this moment

Event by event

1 hail, 1 thunderstorm wind. Local standard time, as filed.

Hail, Charles Mix

When
September 2, 6:15 PM CST to 6:17 PM CST
Where
Charles Mix County, 0.86 mi NE of Dante
Measured
1 in hail
Reported by
Trained Spotter
Coordinates
43.040, -98.190

Thunderstorm Wind, Moody

When
September 2, 6:22 PM CST to 6:25 PM CST
Where
Moody County, 2.1 mi ESE of Flandreau Muni Arpt
Measured
52 kt (60 mph) estimated gust
Reported by
Trained Spotter
Coordinates
43.990, -96.560

Thunderstorm wind gusts broke a 3-inch diameter tree branch.

What these are

Hail
Hail three-quarters of an inch or larger, or smaller hail that caused damage, filed with the largest stone measured.
Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in South Dakota in 2025Every state in 2025This day in weather historyWarnings in South Dakota, September 2025

Sources

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 2026-09-30. Each event’s entry at NCEI: 1292598, 1292599.