The most recent reported hail day was 2023-05-12 -- 3 years ago, with nothing reported since. Brown County is hit in most years. The largest stone on record here is 4.5 inches, a softball and 4.5 times the National Weather Service's 1 inch severe criterion, reported on 2015-05-25 near Netawaka.
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 2023-05-12, around Willis. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Brown 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 25 separate hail days here since 2010 -- 1.5 a year over 17 years of record. Those days carry 53 separate reports between them, two or three on a typical one. 6 of those 17 years produced none at all. The busiest single year was 2015, with 4 hail days. The last five years have been quieter than the long run: 1 days since 2022, against 2.0 a year before that.
5 of the 25 days reached 2 inches or more -- 20%, or about one hail day in 5, the last on 2023-05-12. They land in the same month as everything else, May. 10 of the 25 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 Hiawatha -- 7 of the county's 25 hail days -- then Robinson (5), Fairview (4), Reserve (4) and Sabetha (4). Beyond those, NOAA names Morrill, Netawaka, Everest, Powhattan, Willis, Horton and Nne Morrill on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| 3 N Robinson | 2 | 2.00″ |
| 5 Se Reserve | 2 | 1.75″ |
| 5 Se Sabetha | 2 | 1.75″ |
| Hiawatha | 2 | 1.00″ |
| Nne Morrill | 2 | 1.00″ |
The season runs May through August: 20 of the 25 hail days on record fall in those 4 months (80%). May is the single busiest month, with 10 of them (40%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in March, April and September, outside that window. Reports span 7 of the 12 calendar months; the other 5 have never produced one.
| Month | Hail days |
|---|---|
| March | 1 |
| April | 2 |
| May | 10 |
| June | 5 |
| July | 1 |
| August | 4 |
| September | 2 |
That day put 3 reports on the map, the biggest 2 inches near Willis. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2023-05-12 | 2.00″ | 3 |
| 2020-05-22 | 1.00″ | 1 |
| 2020-03-19 | 1.75″ | 3 |
| 2019-08-15 | 2.75″ | 4 |
| 2019-05-28 | 2.00″ | 4 |
| 2019-05-24 | 1.00″ | 1 |
| 2017-04-09 | 1.00″ | 3 |
| 2016-08-24 | 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 4.5 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, over the state line included: Doniphan County (15 hail days), Nemaha County (35), Atchison County (24) and Richardson County, Nebraska (31). Brown County sits in between.
Doniphan County · Nemaha County · Atchison County · Richardson County, Nebraska
Back to the Kansas hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Brown County, Kansas only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.