Harper County, KS hail & severe wind history
131 storm reports on file for Harper County between 2010-05-10 and 2026-06-21 — 66 hail and 65 severe thunderstorm wind. That averages 7.7 reports a year, and May is the busiest month.
At a glance
- Most recent hail report: Jun 21, 2026 — 1" (quarter), 1.1 mi W of Harper.
- Hail was reported on 42 days since 2010 — about 2.5 hail days a year.
- Largest hail on record: 2.75" (baseball) on Apr 30, 2024.
- Harper County has more hail reports than 11% of the 105 Kansas counties we cover.
Search every Harper County report
Check a single date first, or filter the full record below — pick a year, narrow to a month, or drag the hail-size slider to see only the larger stones (1", quarter size, is the National Weather Service severe threshold).
Loading Harper County storm reports…
Worst storm days in Harper County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2016-05-09 | 5 | 1.75" (golf ball) | 70 mph |
| 2012-05-19 | 5 | 1.5" (ping pong ball) | — |
| 2015-07-16 | 5 | — | 64 mph |
| 2017-06-15 | 4 | 2.75" (baseball) | 81 mph |
| 2011-04-08 | 4 | 2.75" (baseball) | — |
| 2026-06-21 | 4 | 1" (quarter) | 100 mph |
| 2017-03-26 | 4 | 1" (quarter) | 64 mph |
| 2018-06-30 | 4 | — | 64 mph |
| 2018-05-30 | 4 | — | 81 mph |
| 2016-07-08 | 4 | — | 70 mph |
Reports by year
Report counts are driven partly by how many people were around to report a storm, so recent years tend to look busier than the early 2010s. Treat the trend as a reporting trend, not purely a weather trend.
Notable large-hail events (2" and up)
| Date | Size | Near | What was reported |
|---|---|---|---|
| 2025-09-01 | 2.5" tennis ball | .69 mi N of Attica | Hailstones range from quarter size to tennis ball size. |
| 2024-05-25 | 2" hen egg | 5.31 mi NNE of Corwin | Hail ranging from half dollar sized to two inches in diameter fell between Waldron and Attica. |
| 2024-04-30 | 2.75" baseball | 0 mi N of Anthony | Lots of ping pong ball to golf ball sized hail fell in Anthony over the course of at least 15 minutes. Video sent in corroborated several phone calls with some of the hail stones up to baseball size. |
| 2017-06-15 | 2.75" baseball | 6.44 mi SSE of Attica | Golf ball to baseball sized hail. The golf ball sized hail fell for about 20 minutes. |
| 2011-04-08 | 2.75" baseball | 0 mi N of Anthony | No narrative filed |
When does hail hit Harper County?
Across 17 years of records, May produced the most reports (39), followed by the months either side of it. Monthly totals:
| Month | Reports | Share |
|---|---|---|
| January | 0 | 0.0% |
| February | 5 | 3.8% |
| March | 7 | 5.3% |
| April | 16 | 12.2% |
| May | 39 | 29.8% |
| June | 32 | 24.4% |
| July | 16 | 12.2% |
| August | 9 | 6.9% |
| September | 5 | 3.8% |
| October | 1 | 0.8% |
| November | 1 | 0.8% |
| December | 0 | 0.0% |
Neighboring counties
Counties that share a border with Harper County (U.S. Census county adjacency), where we have storm records:
| County | Storm reports | Largest hail |
|---|---|---|
| Sumner County, KS | 262 | 3.5" |
| Kingman County, KS | 256 | 4" |
| Barber County, KS | 228 | 4.25" |
| Grant County, OK | 130 | 3.25" |
| Alfalfa County, OK | 117 | 4.25" |
Common questions about hail in Harper County
- How often does it hail in Harper County?
- Hail was reported on 42 separate days between 2010 and 2026, about 2.5 days a year, with May the busiest month for storm reports. 50 reports were quarter size (1") or larger.
- Does a report here mean hail hit my street?
- Not necessarily. Each report is one observation tied to a nearby landmark, and a county can be large. Storms also go unreported where few people live. Use the date check above to see what was reported nearby, and treat it as a starting point.
- How big is a 1.75" hailstone?
- Forecasters describe hail by everyday objects: 1" is a quarter, 1.75" a golf ball, 2.75" a baseball. The sizes in these reports are estimates made by the person reporting, not lab measurements.
- Where do I get the official record?
- All reports here come from the NOAA NCEI Storm Events Database, which you can search directly. For anything formal, use NOAA’s own records rather than this page.
Look up another place
About these numbers
Every row above is a report filed with the National Weather Service and archived in the NOAA NCEI Storm Events Database (FIPS 20077). Reports are eyewitness, trained-spotter and damage-survey observations, so they cluster near roads and towns and miss storms over empty country. Hail sizes are estimates. Damage figures are preliminary as filed and are never revised in this archive. Use this page for background, not for an insurance claim, a legal filing, or a roof assessment — for those, get the official record from NOAA directly.