StormProof → hail seasons → Washington, DC → 1999
Washington, DC hail season 1999
18 NWS-recorded hail reports ≥1″ within 35 miles, across 2 storm days, max 2.75". Every one of those reports is a dated, located, citable official record — the context behind this market's 1999 claim volume.
Biggest storm days (1999, final record)
| Date | ≥1″ reports | Max hail | Areas named in the record |
|---|---|---|---|
| April 23, 1999 | 16 | 2.75" | CHARLES, PRINCE WILLIAM, FAIRFAX, MANASSAS (C) |
| April 9, 1999 | 2 | 1.50" | ST. MARY'S, CALVERT |
“Many Cars and Homes Damaged by Hail in South Riding Community”
— NWS event narrative, April 23, 1999 (NCEI Storm Events)
When it fell
Apr 18
Wind context: the record also holds 6 thunderstorm-wind events ≥50 kt (≈58 mph, the NWS severe criterion) in this radius for 1999 — relevant where the dispute is wind vs hail causation.
Working a Washington, DC claim from 1999?
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 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.