StormProof → hail seasons → Sioux Falls → 2012
Sioux Falls hail season 2012
8 NWS-recorded hail reports ≥1″ within 25 miles, across 4 storm days, max 1.50". Every one of those reports is a dated, located, citable official record — the context behind this market's 2012 claim volume.
Biggest storm days (2012, final record)
| Date | ≥1″ reports | Max hail | Areas named in the record |
|---|---|---|---|
| May 1, 2012 | 3 | 1.50" | SIOUX, LYON, ROCK |
| August 23, 2012 | 2 | 1.25" | ROCK |
| May 27, 2012 | 2 | 1.00" | LYON, LINCOLN |
| May 5, 2012 | 1 | 1.00" | MINNEHAHA |
“Large hail was accompanied by wind gusts estimated up to 55 mph.”
— NWS event narrative, May 1, 2012 (NCEI Storm Events)
When it fell
May 6 · Aug 2
Wind context: the record also holds 7 thunderstorm-wind events ≥50 kt (≈58 mph, the NWS severe criterion) in this radius for 2012 — relevant where the dispute is wind vs hail causation.
Working a Sioux Falls claim from 2012?
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 25 miles of the Sioux Falls 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.