StormProof → hail seasons → Knoxville → 2011
Knoxville hail season 2011
26 NWS-recorded hail reports ≥1″ within 25 miles, across 6 storm days, max 2.75". Every one of those reports is a dated, located, citable official record — the context behind this market's 2011 claim volume.
Biggest storm days (2011, final record)
| Date | ≥1″ reports | Max hail | Areas named in the record |
|---|---|---|---|
| April 27, 2011 | 14 | 2.75" | BLOUNT, LOUDON, SEVIER, KNOX |
| May 26, 2011 | 7 | 1.75" | BLOUNT, SEVIER |
| April 9, 2011 | 2 | 1.75" | SEVIER, ANDERSON |
| August 18, 2011 | 1 | 1.00" | BLOUNT |
| August 14, 2011 | 1 | 1.00" | SEVIER |
“A trained spotter reported thunderstorms produced half-dollar-size hail at the intersection of central and woodland east of Interstate 275 and north of Interstate 40 in Knoxville.”
— NWS event narrative, April 27, 2011 (NCEI Storm Events)
When it fell
Apr 16 · May 7 · Jun 1 · Aug 2
Wind context: the record also holds 69 thunderstorm-wind events ≥50 kt (≈58 mph, the NWS severe criterion) in this radius for 2011 — relevant where the dispute is wind vs hail causation.
Working a Knoxville claim from 2011?
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 Knoxville 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.