Lyon County was hit as recently as 2026-05-31, 61 days ago. Lyon County is hit in most years, and usually several times over. The largest stone on record here is 4 inches, a grapefruit and 4 times the National Weather Service's 1 inch severe criterion, reported on 2021-12-15 near Emporia.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Kansas. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-05-31, around Olpe. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Lyon County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->NOAA's Storm Prediction Center has logged 55 separate hail days here since 2010 -- 3.2 a year over 17 years of record. Those days carry 141 separate reports between them, two or three on a typical one. Exactly one year since 2010 passed with no reported hail day at all. The busiest single year was 2023, with 6 hail days. The last five years track the long-run rate, with 16 days since 2022.
10 of the 55 days reached 2 inches or more -- 18%, or about one hail day in 6, the last on 2026-04-13. Those big days do not follow the county's usual calendar: most of them fall in March, not May. 21 of the 55 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Kansas, see the Kansas hail map and history.
Reports cluster nearest Emporia -- 25 of the county's 55 hail days -- then Americus (18), Olpe (14), Admire (7) and Allen (6). That one town is named on 45% of them. Beyond those, NOAA names Neosho Rapids, Reading, Bushong and Osage City on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Americus | 10 | 2.00″ |
| Allen | 5 | 2.00″ |
| Olpe | 5 | 1.75″ |
| Emporia | 5 | 1.00″ |
| 5 W Emporia | 3 | 2.50″ |
The season runs March through July: 44 of the 55 hail days on record fall in those 5 months (80%). May is the single busiest month, with 21 of them (38%). That peak sits inside the window rather than at either end. Hail has also been reported in August, September, October and December, outside that window. January, February and November are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| March | 5 |
| April | 9 |
| May | 21 |
| June | 5 |
| July | 4 |
| August | 4 |
| September | 5 |
| October | 1 |
| December | 1 |
That day put 3 reports on the map, the biggest 1.75 inches near Olpe. 3 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-05-31 | 1.75″ | 3 |
| 2026-05-30 | 1.25″ | 2 |
| 2026-04-13 | 2.00″ | 5 |
| 2025-03-27 | 2.00″ | 5 |
| 2024-05-23 | 1.25″ | 1 |
| 2023-09-21 | 1.75″ | 1 |
| 2023-07-30 | 1.00″ | 1 |
| 2023-06-05 | 1.50″ | 3 |
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 4 inches, which is the purple band. Look up a street address with the hail history by address tool.
The nearest counties with a page of their own: Chase County (29 hail days), Coffey County (37) and Morris County (43). Lyon County takes more hail than any of them.
Chase County · Coffey County · Morris County
Back to the Kansas hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Lyon County, Kansas only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.