Verified storm · closed
1.2–4" hail crossed Corson County, SD — September 13, 2025
Measured against the NOAA MRMS national radar feed on its 2-minute cycle — a verified event, not a forecast.
Storm stats
| County | Corson County, SD |
|---|---|
| Max hail (MESH) | 4" |
| Mean hail (MESH) | 1.2" |
| Swath area | 181 mi² (468 km²) |
| Radar cells (~1 km grid) | 549 |
| First radar detection | 2025-09-13 00:00 UTC |
| Last radar detection | 2025-09-13 06:00 UTC |
| Verified | 2025-09-13 00:00 UTC |
| Swath centroid | 45.6720, -101.9728 |
| Storm ID | sw_58604429 |
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