StormProof → hail seasons → Philadelphia → 2010
Philadelphia hail season 2010
10 NWS-recorded hail reports ≥1″ within 35 miles, across 4 storm days, max 1.75". Every one of those reports is a dated, located, citable official record — the context behind this market's 2010 claim volume.
Biggest storm days (2010, final record)
| Date | ≥1″ reports | Max hail | Areas named in the record |
|---|---|---|---|
| May 27, 2010 | 6 | 1.50" | NEW CASTLE, CHESTER, MONTGOMERY |
| June 24, 2010 | 2 | 1.75" | PHILADELPHIA, DELAWARE |
| May 31, 2010 | 1 | 1.00" | MERCER |
| May 14, 2010 | 1 | 1.00" | GLOUCESTER |
“The second severe thunderstorm of the day dropped nickel to ping pong ball size hail in and around Pottstown.”
— NWS event narrative, May 27, 2010 (NCEI Storm Events)
When it fell
May 8 · Jun 2
Wind context: the record also holds 90 thunderstorm-wind events ≥50 kt (≈58 mph, the NWS severe criterion) in this radius for 2010 — relevant where the dispute is wind vs hail causation.
Working a Philadelphia claim from 2010?
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 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.