Verified storm · closed
79 mph wind verified in Perkins County, SD — August 17, 2026
Verified against measured NWS storm reports — ground-truth wind measurements, not radar hail estimates, and never forecasts.
Storm stats
| County | Perkins County, SD |
|---|---|
| Max wind (NWS reports) | 79 mph |
| Swath area | 61 mi² (157 km²) |
| First radar detection | 2026-08-17 20:25 UTC |
| Last radar detection | 2026-08-17 20:45 UTC |
| Verified | 2026-08-17 20:36 UTC |
| Swath centroid | 45.2144, -102.1897 |
| Storm ID | sw_c9e6cb54 |
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Perkins County, SD — verified storm record
Swath has 49 radar-verified hail storms on record for Perkins County, SD going back to July 2025, the largest measuring 5.11″. Every one was measured against NOAA MRMS radar — not estimated, and not a forecast.