StormProof → hail seasons → Chicago → 2009
Chicago hail season 2009
14 NWS-recorded hail reports ≥1″ within 45 miles, across 5 storm days, max 1.50". Every one of those reports is a dated, located, citable official record — the context behind this market's 2009 claim volume.
Biggest storm days (2009, final record)
| Date | ≥1″ reports | Max hail | Areas named in the record |
|---|---|---|---|
| June 19, 2009 | 9 | 1.50" | COOK, DU PAGE, KANE, MCHENRY |
| September 27, 2009 | 2 | 1.00" | LAKE, KANE |
| August 19, 2009 | 1 | 1.00" | KANE |
| July 23, 2009 | 1 | 1.00" | COOK |
| July 11, 2009 | 1 | 1.50" | DU PAGE |
“Nickel to quarter size hail was reported near mile marker 48 on Interstate 90.”
— NWS event narrative, June 19, 2009 (NCEI Storm Events)
When it fell
Jun 9 · Jul 2 · Aug 1 · Sep 2
Wind context: the record also holds 79 thunderstorm-wind events ≥50 kt (≈58 mph, the NWS severe criterion) in this radius for 2009 — relevant where the dispute is wind vs hail causation.
Working a Chicago claim from 2009?
These are aggregates. A claim file needs the per-address record: every recorded event within 1, 3 and 10 miles of the property, distances, official narratives, and citations an adjuster can check line by line. That's the report — generated in seconds, hosted on HailEvidence (the neutral evidence surface), formatted as an insurance-appeal attachment.
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Provenance
Final counts: NCEI Storm Events Database, file vintage c20260527, hail events with recorded magnitude ≥1.00″ and point coordinates within 45 miles of the Chicago anchor. NWS records are point and path observations. The absence of a nearby report does NOT prove that no hail fell at this address — it means no observation was logged nearby. A report of nearby hail documents the event; it does not by itself prove damage to a specific structure. Spotted an error? Email the address on our terms page and we correct against the source.