StormProof → hail seasons → Washington, DC → 2017
Washington, DC hail season 2017
30 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 2017 claim volume.
Biggest storm days (2017, final record)
| Date | ≥1″ reports | Max hail | Areas named in the record |
|---|---|---|---|
| April 21, 2017 | 16 | 1.75" | CALVERT, PRINCE GEORGE'S, DISTRICT OF COLUMBIA, MONTGOMERY |
| February 25, 2017 | 6 | 1.25" | STAFFORD, PRINCE WILLIAM, CHARLES, CALVERT |
| May 18, 2017 | 3 | 1.00" | PRINCE WILLIAM, LOUDOUN |
| August 12, 2017 | 1 | 1.00" | FREDERICK |
| July 17, 2017 | 1 | 1.00" | MONTGOMERY |
“Half dollar sized hail was reported at National Weather Service Headquarters.”
— NWS event narrative, April 21, 2017 (NCEI Storm Events)
When it fell
Feb 6 · Apr 17 · May 5 · Jul 1 · Aug 1
Wind context: the record also holds 361 thunderstorm-wind events ≥50 kt (≈58 mph, the NWS severe criterion) in this radius for 2017 — relevant where the dispute is wind vs hail causation.
Working a Washington, DC claim from 2017?
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 Washington, DC 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.