StormProof → hail seasons → St. Louis → 2018
St. Louis hail season 2018
14 NWS-recorded hail reports ≥1″ within 35 miles, across 8 storm days, max 1.75". Every one of those reports is a dated, located, citable official record — the context behind this market's 2018 claim volume.
Biggest storm days (2018, final record)
| Date | ≥1″ reports | Max hail | Areas named in the record |
|---|---|---|---|
| May 27, 2018 | 5 | 1.50" | ST. LOUIS, ST. LOUIS (C), ST. CLAIR, MADISON |
| June 9, 2018 | 2 | 1.00" | MONROE, ST. CLAIR |
| May 20, 2018 | 2 | 1.00" | MADISON |
| August 10, 2018 | 1 | 1.75" | ST. LOUIS |
| August 2, 2018 | 1 | 1.00" | ST. CLAIR |
When it fell
May 9 · Jun 3 · Aug 2
Wind context: the record also holds 60 thunderstorm-wind events ≥50 kt (≈58 mph, the NWS severe criterion) in this radius for 2018 — relevant where the dispute is wind vs hail causation.
Working a St. Louis claim from 2018?
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 35 miles of the St. Louis 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.