Verified storm · closed

1.1–1.2" hail crossed Clark County, IL — August 11, 2026

Measured against the NOAA MRMS national radar feed on its 2-minute cycle — a verified event, not a forecast.

Storm stats

CountyClark County, IL
Max hail (MESH)1.2"
Mean hail (MESH)1.1"
Swath area4.1 mi² (11 km²)
Radar cells (~1 km grid)11
First radar detection2026-08-11 23:16 UTC
Last radar detection2026-08-11 23:36 UTC
Verified2026-08-11 23:18 UTC
Swath centroid39.3041, -87.6086
Storm IDsw_532ba5ed

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Clark County, IL — verified storm record

Swath has 5 radar-verified hail storms on record for Clark County, IL going back to March 2026, the largest measuring 3.35″. Every one was measured against NOAA MRMS radar — not estimated, and not a forecast.