Hail history for Harper County, Oklahoma
Every NOAA hail report filed in Harper County since 1957, with preliminary National Weather Service reports to November 3, 2026.
Readout · Harper County
- Last hail
- Oct 13, 2026
- 1.00 in, quarter size · preliminary
- Hail days, last 5 years
- 11
- since Nov 3, 2021 · 31 reports
- Largest ever
- 4.50 in
- softball · Apr 30, 1993
368 reports on 195 days since 1957 · #38 of 78 Oklahoma counties
Hail map · Harper County
- Under 1 in
- 1–1.75 in
- 1.75–2.5 in
- 2.5–4 in
- 4 in +
- No size
For homeowners
Roof damage after hail? Get a free inspection
Hail bruises shingles and cracks seals in ways you can't see from the ground, and most insurers set a claim deadline after the storm. The latest hail report in Harper County is from October 13, 2026. A local roofer can check and document it at no cost.
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What the record says about Harper County
The latest hail report in Harper County is from October 13, 2026, 1.00 in (quarter size). Since November 3, 2021 there have been 11 separate hail days; the biggest stones in that time were 2.75 in on June 16, 2026.
Over the 20 years 2006–2025, Harper County logged 114 reports on 53 hail days, about 5.7 reports a year. That is about the same as the median Oklahoma county (6.1 a year) and ranks #38 of 78 Oklahoma counties for all-time reports. Harper County holds 1% of all 31,598 hail reports in Oklahoma.
12% of reports with a size were 2 inches (hen egg) or larger, against 8% for the median Oklahoma county. The largest hail on record here is 4.50 in (softball) on April 30, 1993 near Rosston.
Reports were down 44% in 2016–2025 (41) compared with 2006–2015 (73). The busiest year was 1996, with 28 reports on 8 days. Hail here peaks in May (33% of reports); 75% fall between April and June.
Reports a year 2006–2025 average
- Harper County 5.7
- Median Oklahoma county 6.1
Hail days 2006–2025
- Harper County 53
- Median Oklahoma county 67
Share 2 in or larger of sized reports
- Harper County 12%
- Median Oklahoma county 8%
Hail over time
| Year | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | Total |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 2 | 4 | 1 | 7 | |||||||||
| 2025 | 3 | 6 | 4 | 13 | |||||||||
| 2024 | 0 | ||||||||||||
| 2023 | 1 | 1 | |||||||||||
| 2022 | 10 | 10 | |||||||||||
| 2021 | 1 | 1 | |||||||||||
| 2020 | 1 | 1 | 2 | ||||||||||
| 2019 | 1 | 1 | 2 | ||||||||||
| 2018 | 5 | 3 | 8 | ||||||||||
| 2017 | 1 | 1 | 2 |
Hail days since Nov 3, 2021
| Date | Reports | Largest | Storm page |
|---|---|---|---|
| Oct 13, 2026 | 1 | 1.00 in | View |
| Jun 16, 2026 | 4 | 2.75 in | — |
| Mar 10, 2026 | 1 | 0.75 in | — |
| Mar 4, 2026 | 1 | 1.00 in | — |
| Sep 17, 2025 | 1 | 1.75 in | — |
| Sep 8, 2025 | 3 | 2.50 in | — |
| May 18, 2025 | 6 | 2.75 in | — |
| Apr 24, 2025 | 3 | 2.25 in | — |
| Aug 13, 2023 | 1 | 1.00 in | — |
| May 14, 2022 | 8 | 2.50 in | — |
| May 12, 2022 | 2 | 1.00 in | — |
Largest hail on record
| Date | Size | Location | Time · source |
|---|---|---|---|
| Apr 30, 1993 | 4.50 insoftball | Rosston | 19:42 local · NCEI |
| Apr 30, 1993 | 4.50 insoftball | Laverne | 16:30 local · NCEI |
| Mar 2, 2008 | 4.25 ingrapefruit | Buffalo | 14:40 local · NCEI |
| May 23, 2007 | 4.25 ingrapefruit | 6 W Buffalo | 15:48 local · NCEI |
| Jun 5, 1959 | 4.00 ingrapefruit | — | 20:00 local · NCEI |
Sizes filed before 1996 are often rough estimates (round numbers like 7.00 or 8.00 in) without an exact spot; they are shown as NOAA filed them.
Size of every report
- Under 1 in 143 39%
- 1–2 in 181 49%
- 2 in + 44 12%
Most recent reports
| Date | Size | Location | Time · source |
|---|---|---|---|
| Oct 13, 2026 | 1.00 inquarter | 7 NW Fort Supply | 22:53 UTC · NWS prelim. |
| Jun 16, 2026 | 2.75 inbaseball | 3 W Laverne | 18:25 local · NCEI |
| Jun 16, 2026 | 1.75 ingolf ball | 2 W Laverne | 18:20 local · NCEI |
| Jun 16, 2026 | 0.88 innickel | Laverne | 18:18 local · NCEI |
| Jun 16, 2026 | 1.75 ingolf ball | 3.21 WNW Rosston | 17:52 local · NCEI |
| Mar 10, 2026 | 0.75 inpenny | 6.83 ENE May | 15:40 local · NCEI |
| Mar 4, 2026 | 1.00 inquarter | 0.15 SE Buffalo | 00:01 local · NCEI |
| Sep 17, 2025 | 1.75 ingolf ball | 13.8 N Selman | 17:08 local · NCEI |
| Sep 8, 2025 | 1.75 ingolf ball | Laverne | 18:00 local · NCEI |
| Sep 8, 2025 | 2.50 intennis ball | Rosston | 17:25 local · NCEI |
| Sep 8, 2025 | 2.00 inhen egg | 8.06 NE Rosston | 17:05 local · NCEI |
| May 18, 2025 | 1.50 inping pong ball | 4.87 NNW Rosston | 16:40 local · NCEI |
Cities and towns in Harper County
Questions about hail in Harper County
How often does it hail in Harper County, Oklahoma?
368 hail reports have been logged in Harper County since 1957. Over the 20 years 2006–2025 that averages 5.7 reports a year. That ranks #38 of 78 Oklahoma counties by number of reports.
When is hail season in Harper County?
Most reports come in May, June, April. May alone accounts for 33% of all reports.
What is the largest hail recorded in Harper County?
4.50 in (softball size) on April 30, 1993 near Rosston. 12% of reports here were 2 inches or larger.
When did it last hail in Harper County?
The most recent report in this data is from October 13, 2026 (1.00 in). Final NOAA data runs to July 31, 2026; preliminary NWS reports run to November 3, 2026.
How many hail storms has Harper County had in the last five years?
11 separate days with hail reports since November 3, 2021, adding up to 31 reports. The most recent was October 13, 2026.
Where does this hail data come from?
Hail reports come from the NOAA NCEI Storm Events Database, which the National Weather Service compiles from spotter, public, law enforcement and media reports. Recent days use preliminary NWS Local Storm Reports via the Iowa Environmental Mesonet until NOAA publishes final data. Only reported hail is counted, so areas with fewer people tend to have fewer reports.