Verified storm · closed
1.1–2.2" hail crossed Allamakee County, IA — September 4, 2026
Measured against the NOAA MRMS national radar feed on its 2-minute cycle — a verified event, not a forecast.
Storm stats
| County | Allamakee County, IA |
|---|---|
| Max hail (MESH) | 2.2" |
| Mean hail (MESH) | 1.1" |
| Swath area | 44 mi² (114 km²) |
| Radar cells (~1 km grid) | 127 |
| First radar detection | 2026-09-04 18:54 UTC |
| Last radar detection | 2026-09-04 20:46 UTC |
| Verified | 2026-09-04 18:56 UTC |
| Swath centroid | 43.3317, -91.4933 |
| Storm ID | sw_c50986ef |
Address lookup — $8
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Allamakee County, IA — verified storm record
Swath has 9 radar-verified hail storms on record for Allamakee County, IA going back to August 2025, the largest measuring 2.69″. Every one was measured against NOAA MRMS radar — not estimated, and not a forecast.
