Verified storm · closed
1.2–1.5" hail crossed Jefferson County, IL — August 22, 2026
Measured against the NOAA MRMS national radar feed on its 2-minute cycle — a verified event, not a forecast.
Storm stats
| County | Jefferson County, IL |
|---|---|
| Max hail (MESH) | 1.5" |
| Mean hail (MESH) | 1.2" |
| Swath area | 5.3 mi² (14 km²) |
| Radar cells (~1 km grid) | 14 |
| First radar detection | 2026-08-22 08:48 UTC |
| Last radar detection | 2026-08-22 09:54 UTC |
| Verified | 2026-08-22 08:50 UTC |
| Swath centroid | 38.3136, -89.0114 |
| Storm ID | sw_3b481f91 |
Address lookup — $8
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Jefferson County, IL — verified storm record
Swath has 10 radar-verified hail storms on record for Jefferson County, IL going back to September 2025, the largest measuring 2.44″. Every one was measured against NOAA MRMS radar — not estimated, and not a forecast.
