Verified storm · closed
1.2–3.2" hail crossed Slope County, ND — August 12, 2026
Measured against the NOAA MRMS national radar feed on its 2-minute cycle — a verified event, not a forecast.
Storm stats
| County | Slope County, ND |
|---|---|
| Max hail (MESH) | 3.2" |
| Mean hail (MESH) | 1.2" |
| Swath area | 110 mi² (284 km²) |
| Radar cells (~1 km grid) | 333 |
| First radar detection | 2026-08-12 00:38 UTC |
| Last radar detection | 2026-08-12 01:54 UTC |
| Verified | 2026-08-12 00:40 UTC |
| Swath centroid | 46.5797, -103.1398 |
| Storm ID | sw_4bf41009 |
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Slope County, ND — verified storm record
Swath has 24 radar-verified hail storms on record for Slope County, ND going back to July 2025, the largest measuring 3.75″. Every one was measured against NOAA MRMS radar — not estimated, and not a forecast.