Verified storm · closed
92 mph wind verified in Butte County, SD — August 12, 2026
Verified against measured NWS storm reports — ground-truth wind measurements, not radar hail estimates, and never forecasts.
Storm stats
| County | Butte County, SD |
|---|---|
| Max wind (NWS reports) | 92 mph |
| Swath area | 91 mi² (235 km²) |
| First radar detection | 2026-08-12 00:29 UTC |
| Last radar detection | 2026-08-12 00:41 UTC |
| Verified | 2026-08-12 00:40 UTC |
| Swath centroid | 44.9131, -103.6148 |
| Storm ID | sw_4430a420 |
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Butte County, SD — verified storm record
Swath has 54 radar-verified hail storms on record for Butte County, SD going back to July 2025, the largest measuring 4.86″. Every one was measured against NOAA MRMS radar — not estimated, and not a forecast.