Verified storm · closed
1.3–3.6" hail crossed Campbell County, SD — July 20, 2026
Measured against the NOAA MRMS national radar feed on its 2-minute cycle — a verified event, not a forecast.
Storm stats
| County | Campbell County, SD |
|---|---|
| Max hail (MESH) | 3.6" |
| Mean hail (MESH) | 1.3" |
| Swath area | 60 mi² (155 km²) |
| Radar cells (~1 km grid) | 180 |
| First radar detection | 2026-07-20 02:06 UTC |
| Last radar detection | 2026-07-20 03:46 UTC |
| Verified | 2026-07-20 02:07 UTC |
| Swath centroid | 45.9232, -99.7967 |
| Storm ID | sw_4289811f |
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