Verified storm · closed
91 mph wind verified in Cook County, IL — August 11, 2026
Verified against measured NWS storm reports — ground-truth wind measurements, not radar hail estimates, and never forecasts.
Storm stats
| County | Cook County, IL |
|---|---|
| Max wind (NWS reports) | 91 mph |
| Swath area | 198 mi² (514 km²) |
| First radar detection | 2026-08-11 16:01 UTC |
| Last radar detection | 2026-08-11 16:20 UTC |
| Verified | 2026-08-11 16:04 UTC |
| Swath centroid | 41.6610, -87.9099 |
| Storm ID | sw_faae1272 |
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Cook County, IL — verified storm record
Swath has 17 radar-verified hail storms on record for Cook County, IL going back to July 2025, the largest measuring 5.00″. Every one was measured against NOAA MRMS radar — not estimated, and not a forecast.