Historical hail archive: January 2016–December 2025. NOAA radar estimates within 25 miles of each city centre. ZIP matches use the first three digits; this is not a property-level report or a live alert service. Coverage and source.
Cleveland County · Oklahoma · NOAA radar record 2016–2025
Hail damage in Norman, OK
Radar has detected hail over Norman on 337 separate days since 2016. On 122 of them the largest stone was estimated at golf-ball size or bigger. The biggest was 10.2 cm on September 24, 2024.
A very high value in this historical exposure model. This is not a national percentile or a diagnosis of your roof; the component values explain the result.
How we got to that number
| Component | Value | Weight | Contribution |
|---|---|---|---|
| Frequency Hail days per year at 1.00 in (2.5 cm) or larger | 69 / 100 | × 0.35 | 24.2 |
| Severity Largest stone radar estimated in the whole window | 100 / 100 | × 0.30 | 30.0 |
| Recency How long since the last 2 in (5 cm) day | 96 / 100 | × 0.20 | 19.2 |
| Concentration Hail days per year reaching golf-ball size | 61 / 100 | × 0.15 | 9.2 |
| RoofTake Score | 82 | ||
The score describes an area, not a house. Two roofs on the same street of different ages face very different risk from the identical storm. The whole formula and its weights are on the methodology page, and you can recompute it yourself from our public data.
Home of the National Weather Center, and one of the most-scanned skies in America.
Check your own ZIP code Is your roof damaged?
Data last refreshed: · source: NOAA NCEI Severe Weather Data Inventory, dataset nx3hail
The ten biggest hail days in Norman since 2016
| Date | Radar max size | Metric | Comparison | Signatures |
|---|---|---|---|---|
| February 23, 2018 | 4.00 in | 10.2 cm | Grapefruit | 1 |
| May 29, 2019 | 4.00 in | 10.2 cm | Grapefruit | 71 |
| May 4, 2020 | 4.00 in | 10.2 cm | Grapefruit | 133 |
| April 29, 2021 | 4.00 in | 10.2 cm | Grapefruit | 38 |
| October 11, 2021 | 4.00 in | 10.2 cm | Grapefruit | 68 |
| July 9, 2023 | 4.00 in | 10.2 cm | Grapefruit | 130 |
| September 24, 2024 | 4.00 in | 10.2 cm | Grapefruit | 26 |
| July 7, 2024 | 3.75 in | 9.5 cm | Teacup | 46 |
| August 11, 2024 | 3.75 in | 9.5 cm | Teacup | 73 |
| August 27, 2019 | 3.50 in | 8.9 cm | Teacup | 276 |
"Signatures" is the number of separate radar volume scans that detected hail in a storm cell within 25 miles that day. More signatures means a longer-lived or larger storm, not necessarily bigger stones.
Hail days by year
Busiest year in the record: 2016 with 40 hail days.
Hail days by month
Peak month: May. Hail season in Oklahoma is short and it is not distributed evenly — most of the annual risk arrives in a few weeks.
What to do with this if you own a roof in Norman
- Find your dates. Look up your ZIP for the record nearest you, and note every day at 1.00 in or above since you bought the house.
- Work out whether your roof could have survived them. A twelve-year-old asphalt roof and a two-year-old one respond very differently to the same stone — the age calculator explains why.
- Look, before you file. Nine photographs, none of them requiring you to get on the roof.
- Check the arithmetic. If the actual cash value of the damage is under your deductible, filing pays nothing — work it out first.
- Then write. The letter generator puts the Norman radar record and the NOAA citation into your notice of claim.
Every hail day radar recorded near Norman
337 days, most recent first. Sizes are radar estimates of the largest stone aloft in the cell, not measurements at any address.
- November 20, 20251.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- October 24, 20253.50 in (8.9 cm) — Teacup size, radar-estimated
- September 19, 20251.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- August 20, 20251.00 in (2.5 cm) — Quarter size, radar-estimated
- August 19, 20251.75 in (4.4 cm) — Golf ball size, radar-estimated
- August 17, 20251.00 in (2.5 cm) — Quarter size, radar-estimated
- August 11, 20252.50 in (6.3 cm) — Tennis ball size, radar-estimated
- August 4, 20251.00 in (2.5 cm) — Quarter size, radar-estimated
- July 12, 20251.00 in (2.5 cm) — Quarter size, radar-estimated
- July 8, 20251.75 in (4.4 cm) — Golf ball size, radar-estimated
- June 30, 20250.50 in (1.3 cm) — Marble size, radar-estimated
- June 18, 20252.00 in (5.1 cm) — Hen egg size, radar-estimated
- June 14, 20250.75 in (1.9 cm) — Penny size, radar-estimated
- June 9, 20251.00 in (2.5 cm) — Quarter size, radar-estimated
- June 7, 20251.00 in (2.5 cm) — Quarter size, radar-estimated
- June 6, 20252.00 in (5.1 cm) — Hen egg size, radar-estimated
- June 3, 20251.75 in (4.4 cm) — Golf ball size, radar-estimated
- June 1, 20251.00 in (2.5 cm) — Quarter size, radar-estimated
- May 29, 20251.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- May 26, 20251.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- May 25, 20253.25 in (8.3 cm) — Teacup size, radar-estimated
- May 24, 20252.75 in (7.0 cm) — Baseball size, radar-estimated
- May 22, 20252.00 in (5.1 cm) — Hen egg size, radar-estimated
- May 19, 20252.00 in (5.1 cm) — Hen egg size, radar-estimated
- May 18, 20253.50 in (8.9 cm) — Teacup size, radar-estimated
- May 17, 20252.00 in (5.1 cm) — Hen egg size, radar-estimated
- May 2, 20251.00 in (2.5 cm) — Quarter size, radar-estimated
- April 30, 20250.50 in (1.3 cm) — Marble size, radar-estimated
- April 29, 20253.00 in (7.6 cm) — Teacup size, radar-estimated
- April 26, 20251.25 in (3.2 cm) — Half dollar size, radar-estimated
- April 25, 20250.75 in (1.9 cm) — Penny size, radar-estimated
- April 19, 20251.75 in (4.4 cm) — Golf ball size, radar-estimated
- April 4, 20250.75 in (1.9 cm) — Penny size, radar-estimated
- April 2, 20251.25 in (3.2 cm) — Half dollar size, radar-estimated
- March 30, 20252.00 in (5.1 cm) — Hen egg size, radar-estimated
- February 12, 20250.75 in (1.9 cm) — Penny size, radar-estimated
- November 4, 20241.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- November 3, 20241.25 in (3.2 cm) — Half dollar size, radar-estimated
- October 11, 20240.50 in (1.3 cm) — Marble size, radar-estimated
- September 25, 20242.75 in (7.0 cm) — Baseball size, radar-estimated
- September 24, 20244.00 in (10.2 cm) — Grapefruit size, radar-estimated
- August 16, 20242.00 in (5.1 cm) — Hen egg size, radar-estimated
- August 15, 20243.00 in (7.6 cm) — Teacup size, radar-estimated
- August 11, 20243.75 in (9.5 cm) — Teacup size, radar-estimated
- August 2, 20241.00 in (2.5 cm) — Quarter size, radar-estimated
- July 21, 20240.75 in (1.9 cm) — Penny size, radar-estimated
- July 17, 20240.75 in (1.9 cm) — Penny size, radar-estimated
- July 7, 20243.75 in (9.5 cm) — Teacup size, radar-estimated
- July 5, 20241.25 in (3.2 cm) — Half dollar size, radar-estimated
- July 4, 20241.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- June 30, 20240.75 in (1.9 cm) — Penny size, radar-estimated
- June 26, 20242.00 in (5.1 cm) — Hen egg size, radar-estimated
- June 5, 20241.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- June 4, 20242.50 in (6.3 cm) — Tennis ball size, radar-estimated
- June 3, 20242.00 in (5.1 cm) — Hen egg size, radar-estimated
- June 2, 20241.00 in (2.5 cm) — Quarter size, radar-estimated
- May 23, 20241.50 in (3.8 cm) — Ping-pong ball size, radar-estimated
- May 22, 20241.75 in (4.4 cm) — Golf ball size, radar-estimated
- May 20, 20242.50 in (6.3 cm) — Tennis ball size, radar-estimated
- May 16, 20240.50 in (1.3 cm) — Marble size, radar-estimated
Showing the 60 most recent of 337. The full record is in the JSON we publish: norman-ok.json.
From people in Norman
The part of this page that no dataset can produce. Everything here is read by a human before it appears.
Neighbourhood reports
Claim outcomes
Damage photos from Norman storms
Hail in Norman, OK: common questions
How often does Norman get damaging hail?
Radar recorded 337 hail days within 25 miles of the city centre between 2016 and 2025 — an average of 33.7 a year, of which 12.2 a year were at golf-ball size or larger. Not every one of those damages roofs.
When is hail season in Norman?
The busiest month in this record is May, and 2016 was the busiest single year with 40 hail days.
Does this mean my roof is damaged?
No. These are radar estimates of the largest stone aloft in a storm cell somewhere within 25 miles of the city centre. Whether anything landed on your street, and whether it damaged your particular roof, needs somebody to look.
How do I use this for an insurance claim?
A specific date with a public, citable source is what turns 'sometime last year' into a date of loss. Use the claim letter generator, which pulls the date and the NOAA citation in for you.
Why 25 miles?
It is wide enough to catch storms that clipped the metro and narrow enough that the number still means something for a house inside it. The same radius is used for every metro so the pages are comparable.
Get quotes from roofers who work in Norman
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