StormProof → hail seasons → Philadelphia → 2021
Philadelphia hail season 2021
28 NWS-recorded hail reports ≥1″ within 35 miles, across 8 storm days, max 1.50". Every one of those reports is a dated, located, citable official record — the context behind this market's 2021 claim volume.
Biggest storm days (2021, final record)
| Date | ≥1″ reports | Max hail | Areas named in the record |
|---|---|---|---|
| July 21, 2021 | 11 | 1.25" | CAMDEN, MONTGOMERY |
| July 29, 2021 | 6 | 1.50" | BURLINGTON |
| July 6, 2021 | 5 | 1.00" | MONTGOMERY, MERCER |
| June 4, 2021 | 2 | 1.25" | PHILADELPHIA, BUCKS |
| July 17, 2021 | 1 | 1.00" | HUNTERDON |
“Photos relayed on social media of hail slightly larger than quarter size. Time estimated from radar.”
— NWS event narrative, July 21, 2021 (NCEI Storm Events)
When it fell
Apr 1 · Jun 4 · Jul 23
Wind context: the record also holds 413 thunderstorm-wind events ≥50 kt (≈58 mph, the NWS severe criterion) in this radius for 2021 — relevant where the dispute is wind vs hail causation.
Working a Philadelphia claim from 2021?
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.
Unlimited reports — Pro $99/mo Single report $29
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 Philadelphia 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.