Verified storm · closed
1.2–2.3" hail crossed Garfield County, MT — August 17, 2026
Measured against the NOAA MRMS national radar feed on its 2-minute cycle — a verified event, not a forecast.
Storm stats
| County | Garfield County, MT |
|---|---|
| Max hail (MESH) | 2.3" |
| Mean hail (MESH) | 1.2" |
| Swath area | 149 mi² (387 km²) |
| Radar cells (~1 km grid) | 460 |
| First radar detection | 2026-08-17 22:48 UTC |
| Last radar detection | 2026-08-18 00:48 UTC |
| Verified | 2026-08-17 22:50 UTC |
| Swath centroid | 47.3367, -106.9960 |
| Storm ID | sw_1c9a422c |
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Garfield County, MT — verified storm record
Swath has 23 radar-verified hail storms on record for Garfield County, MT going back to July 2025, the largest measuring 3.21″. Every one was measured against NOAA MRMS radar — not estimated, and not a forecast.