The most recent reported hail day was 2025-07-27, 369 days ago. Big Stone County is hit in most years. 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 2024-07-31 near Graceville.
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 2025-07-27, around Johnson. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Big Stone County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
Get free access Check an addressOur US-based call center calls the homeowners in this storm and books roof inspections straight onto your calendar. You work the storm; we fill the schedule. We dial -- you do not have to knock a single door.
See call-center options ->NOAA's Storm Prediction Center has logged 22 separate hail days here since 2010 -- 1.3 a year over 17 years of record. Those days carry 46 separate reports between them, two or three on a typical one. 3 of those 17 years produced none at all. The busiest single year was 2024, with 3 hail days. The last five years track the long-run rate, with 5 days since 2022.
Roof-killing hail is routine here: 8 of the 22 days reached 2 inches or more, 36% of them, the last on 2024-07-31. They land in the same month as everything else, July. 10 of the 22 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Minnesota, see the Minnesota hail map and history.
Reports cluster nearest Ortonville -- 9 of the county's 22 hail days -- then Correll (4), Artichoke (3), Clinton (3) and Odessa (3). That one town is named on 41% of them. Beyond those, NOAA names Beardsley on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Ortonville | 6 | 2.00″ |
| 1 N Ortonville | 2 | 1.75″ |
| Graceville | 1 | 4.00″ |
| 4 Wsw Artichoke | 1 | 3.00″ |
| 3 Ne Correll | 1 | 2.75″ |
The season runs May through August: 21 of the 22 hail days on record fall in those 4 months (95%). July is the single busiest month, with 9 of them (41%). That peak sits inside the window rather than at either end. Hail has also been reported in October, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| May | 5 |
| June | 2 |
| July | 9 |
| August | 5 |
| October | 1 |
That day put 1 report on the map, the biggest 1.5 inches near Johnson. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-07-27 | 1.50″ | 1 |
| 2024-07-31 | 4.00″ | 7 |
| 2024-07-22 | 1.00″ | 1 |
| 2024-06-02 | 1.00″ | 1 |
| 2022-05-30 | 1.00″ | 1 |
| 2021-08-28 | 2.75″ | 2 |
| 2020-10-11 | 2.50″ | 2 |
| 2020-07-08 | 2.00″ | 2 |
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, over the state line included: Stevens County (19 hail days), Traverse County (20), Lac qui Parle County (19), Grant County, South Dakota (22) and Roberts County, South Dakota (26). Big Stone County sits in between.
Stevens County · Traverse County · Lac qui Parle County · Grant County, South Dakota · Roberts County, South Dakota
Back to the Minnesota hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Big Stone County, Minnesota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.