The most recent reported hail day was 2026-04-17, 105 days ago. Atchison County has recorded hail in nearly every year on the archive. The largest stone on record here is 2.75 inches, a baseball and 2.8 times the National Weather Service's 1 inch severe criterion, reported on 2010-05-06 near Atchison.
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 2026-04-17, around Atchison. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Atchison 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 24 separate hail days here since 2010 -- 1.4 a year over 17 years of record. They carry 40 reports in total: most hail days here are logged from a single spot. 2 of those 17 years produced none at all. The busiest single year was 2011, with 4 hail days. The last five years track the long-run rate, with 6 days since 2022.
4 of the 24 days reached 2 inches or more -- 17%, or about one hail day in 6, the last on 2016-04-26. Those big days do not follow the county's usual calendar: most of them fall in April, not May. 10 of the 24 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 Atchison -- 9 of the county's 24 hail days -- then Effingham (6), Lancaster (4), Muscotah (4) and Lancaster Ks (2). Beyond those, NOAA names Nortonville, Potter and Farmington on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Lancaster | 3 | 2.25″ |
| Muscotah | 3 | 1.50″ |
| Atchison | 3 | 1.00″ |
| Effingham | 3 | 1.00″ |
| Lancaster Ks | 2 | 1.75″ |
The season runs March through June: 20 of the 24 hail days on record fall in those 4 months (83%). May is the single busiest month, with 9 of them (38%). That peak sits inside the window rather than at either end. Hail has also been reported in August, October and November, outside that window. Reports span 7 of the 12 calendar months; the other 5 have never produced one.
| Month | Hail days |
|---|---|
| March | 2 |
| April | 7 |
| May | 9 |
| June | 2 |
| August | 2 |
| October | 1 |
| November | 1 |
That day put 2 reports on the map, the biggest 1 inch near Atchison. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-17 | 1.00″ | 2 |
| 2025-05-31 | 1.00″ | 1 |
| 2024-10-24 | 1.00″ | 1 |
| 2024-03-13 | 1.00″ | 1 |
| 2023-04-04 | 1.00″ | 2 |
| 2022-05-30 | 1.50″ | 1 |
| 2020-04-11 | 1.00″ | 1 |
| 2019-05-14 | 1.00″ | 1 |
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 2.75 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: Doniphan County (15 hail days), Jefferson County (35) and Jackson County (40). Atchison County sits in between.
Doniphan County · Jefferson County · Jackson 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, Atchison County, Kansas only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.