Verified storm · active
1.1–2.7" hail crossed McCook County, SD — August 7, 2026
Measured against the NOAA MRMS national radar feed on its 2-minute cycle — a verified event, not a forecast.
Storm stats
| County | McCook County, SD |
|---|---|
| Max hail (MESH) | 2.7" |
| Mean hail (MESH) | 1.1" |
| Swath area | 134 mi² (346 km²) |
| Radar cells (~1 km grid) | 387 |
| First radar detection | 2026-08-07 09:56 UTC |
| Last radar detection | 2026-08-07 11:38 UTC |
| Verified | 2026-08-07 09:58 UTC |
| Swath centroid | 43.8340, -97.5512 |
| Storm ID | sw_a9ba8b11 |
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McCook County, SD — verified storm record
Swath has 12 radar-verified hail storms on record for McCook County, SD going back to July 2025, the largest measuring 3.55″. Every one was measured against NOAA MRMS radar — not estimated, and not a forecast.