StormProof → hail seasons → Bismarck → 2023
Bismarck hail season 2023
7 NWS-recorded hail reports ≥1″ within 25 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 2023 claim volume.
Biggest storm days (2023, final record)
| Date | ≥1″ reports | Max hail | Areas named in the record |
|---|---|---|---|
| May 9, 2023 | 3 | 1.75" | BURLEIGH, MORTON |
| August 1, 2023 | 2 | 1.00" | MORTON, BURLEIGH |
| July 26, 2023 | 1 | 1.00" | BURLEIGH |
| June 20, 2023 | 1 | 1.00" | MCLEAN |
“A supercell thunderstorm over Mandan, Morton County, moved into Bismarck, Burleigh County. Initially, the storm continued to produce golf ball size hail near Bismarck State College, but hail size decreased to around one-inch in diameter as it moved through the city. Vehicles and homes were damaged, mainly on the western side of Bismarck.”
— NWS event narrative, May 9, 2023 (NCEI Storm Events)
When it fell
May 3 · Jun 1 · Jul 1 · Aug 2
Wind context: the record also holds 11 thunderstorm-wind events ≥50 kt (≈58 mph, the NWS severe criterion) in this radius for 2023 — relevant where the dispute is wind vs hail causation.
Working a Bismarck claim from 2023?
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 Bismarck 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.