Watonwan County was hit as recently as 2026-05-17, 75 days ago. Watonwan County is hit in about half the years on record. The largest stone on record here is 2.5 inches, a tennis ball and 2.5 times the National Weather Service's 1 inch severe criterion, reported on 2026-04-13 near Ormsby.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Minnesota. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-05-17, around Lewisville. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Watonwan 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 14 separate hail days here since 2010 -- 0.8 a year over 17 years of record. Those days carry 28 separate reports between them, two or three on a typical one. 7 of those 17 years produced none at all. One year dominates the record: 2010 alone produced 3 of the 14 days. The last five years track the long-run rate, with 5 days since 2022.
2 of the 14 days reached 2 inches or more -- 14%, or about one hail day in 7, the last on 2026-04-13. Those big days do not follow the county's usual calendar: most of them fall in April, not June. Golf-ball size is rarer still: 1.75 inches or more on 3 of the 14 days.
Across the whole of Minnesota, see the Minnesota hail map and history.
Reports cluster nearest Lewisville -- 5 of the county's 14 hail days -- then Madelia (3), Odin (3), Butterfield (3) and St. James (2).
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Lewisville | 2 | 1.75″ |
| Butterfield | 2 | 1.00″ |
| 4 E Ormsby | 1 | 2.50″ |
| 6 SW Lewisville | 1 | 2.00″ |
| 6 WSW Lewisville | 1 | 2.00″ |
The season runs April through August: 13 of the 14 hail days on record fall in those 5 months (93%). June is the single busiest month, with 4 of them (29%). That peak sits inside the window rather than at either end. Hail has also been reported in September, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| April | 2 |
| May | 2 |
| June | 4 |
| July | 2 |
| August | 3 |
| September | 1 |
That day put 1 report on the map, the biggest 1.25 inches near Lewisville. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-05-17 | 1.25″ | 1 |
| 2026-04-13 | 2.50″ | 8 |
| 2025-06-12 | 1.25″ | 1 |
| 2024-08-05 | 1.50″ | 1 |
| 2023-08-11 | 1.00″ | 1 |
| 2020-06-02 | 1.00″ | 1 |
| 2019-06-20 | 1.75″ | 1 |
| 2019-04-17 | 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 2.5 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: Martin County (21 hail days), Brown County (15) and Cottonwood County (25). Every one of them takes more hail than Watonwan County.
Martin County · Brown County · Cottonwood County
Back to the Minnesota hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Watonwan County, Minnesota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.