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Jefferson County, KS hail & severe wind history
301 storm reports on file for Jefferson County between 2010-04-06 and 2026-06-13 — 123 hail and 178 severe thunderstorm wind. That averages 17.7 reports a year, and Jun is the busiest month.
At a glance
- Most recent hail report: Apr 17, 2026 — 1" (quarter), 1.75 mi ENE of Valley Falls.
- Hail was reported on 42 days since 2010 — about 2.6 hail days a year.
- Largest hail on record: 3.5" (teacup) on Sep 18, 2010.
- Jefferson County has more hail reports than 45% of the 105 Kansas counties we cover.
Search every Jefferson 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 Jefferson County storm reports…
Worst storm days in Jefferson County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2010-09-18 | 25 | 3.5" (teacup) | — |
| 2023-07-14 | 16 | — | 85 mph |
| 2011-05-21 | 14 | 2.75" (baseball) | — |
| 2019-08-17 | 12 | 1.5" (ping pong ball) | 72 mph |
| 2016-05-26 | 10 | 2.75" (baseball) | 90 mph |
| 2023-06-30 | 10 | 1" (quarter) | 90 mph |
| 2021-06-11 | 9 | 1" (quarter) | 81 mph |
| 2011-08-19 | 8 | 3" (teacup) | 90 mph |
| 2017-05-18 | 8 | 1.5" (ping pong ball) | 90 mph |
| 2024-07-16 | 8 | — | 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 |
|---|---|---|---|
| 2023-09-16 | 2.5" tennis ball | .54 mi W of Rock Creek | Tennis ball sized hail reported by the emergency manager. |
| 2023-09-16 | 2" hen egg | 1.48 mi SSE of Rock Creek | Hen egg sized hail reported. |
| 2023-09-16 | 2.5" tennis ball | 2.14 mi SSE of Rock Creek | Emergency manager reported significant damage to vehicles and windows from tennis ball sized hail. |
| 2016-05-26 | 2.75" baseball | 1.61 mi E of Williamstown | Local Fire Department reported the hail. |
| 2016-05-26 | 2.75" baseball | 3.45 mi S of Meriden | No narrative filed |
| 2016-05-26 | 2.75" baseball | .69 mi N of Meriden | Two injuries reported by the Emergency Manager. The victims refused treatment. Time was based on radar. |
| 2014-05-10 | 2" hen egg | 3.62 mi NNW of Thompsonville | No narrative filed |
| 2011-08-19 | 3" teacup | 5.91 mi E of Nortonville | Hail cracked two windows at the home. |
When does hail hit Jefferson County?
Across 16 years of records, June produced the most reports (70), followed by the months either side of it. Monthly totals:
| Month | Reports | Share |
|---|---|---|
| January | 0 | 0.0% |
| February | 0 | 0.0% |
| March | 5 | 1.7% |
| April | 30 | 10.0% |
| May | 58 | 19.3% |
| June | 70 | 23.3% |
| July | 44 | 14.6% |
| August | 42 | 14.0% |
| September | 33 | 11.0% |
| October | 10 | 3.3% |
| November | 2 | 0.7% |
| December | 7 | 2.3% |
Neighboring counties
Counties that share a border with Jefferson County (U.S. Census county adjacency), where we have storm records:
| County | Storm reports | Largest hail |
|---|---|---|
| Shawnee County, KS | 532 | 5.25" |
| Douglas County, KS | 291 | 2.5" |
| Leavenworth County, KS | 276 | 4.5" |
| Jackson County, KS | 174 | 2.5" |
| Atchison County, KS | 91 | 2.75" |
Common questions about hail in Jefferson County
- How often does it hail in Jefferson County?
- Hail was reported on 42 separate days between 2010 and 2026, about 2.6 days a year, with June the busiest month for storm reports. 101 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 20087). 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.