Mellette County was hit as recently as 2026-06-02, 59 days ago. Mellette County has recorded hail in nearly every year on the archive. 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 2020-08-26 near Norris.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in South Dakota. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-06-02, around White River. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Mellette 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 33 separate hail days here since 2010 -- 1.9 a year over 17 years of record. Those days carry 60 separate reports between them, two or three on a typical one. 2 of those 17 years produced none at all. The busiest single year was 2019, with 5 hail days. The last five years track the long-run rate, with 8 days since 2022.
Most hail here stays under 2 inches: only 3 of the 33 days on record passed it, 9%, the last on 2020-08-26. Those big days do not follow the county's usual calendar: most of them fall in August, not July. Golf-ball size is rarer still: 1.75 inches or more on 5 of the 33 days.
Across the whole of South Dakota, see the South Dakota hail map and history.
Reports cluster nearest White River -- 17 of the county's 33 hail days -- then Wood (12), Norris (7), Cedar Butte (7) and Mosher (2). That one town is named on 52% of them.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| 5 ESE Norris | 4 | 2.50″ |
| White River | 4 | 1.50″ |
| 7 W Cedar Butte | 2 | 1.00″ |
| Wood | 2 | 1.00″ |
| 6 E Norris | 1 | 4.50″ |
The season runs June through August: 30 of the 33 hail days on record fall in those 3 months (91%). July is the single busiest month, with 11 of them (33%). That peak sits inside the window rather than at either end. Hail has also been reported in May and September, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| May | 1 |
| June | 9 |
| July | 11 |
| August | 10 |
| September | 2 |
That day put 1 report on the map, the biggest 1.5 inches near White River. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-06-02 | 1.50″ | 1 |
| 2025-07-01 | 1.75″ | 1 |
| 2024-07-29 | 1.50″ | 2 |
| 2023-09-20 | 1.25″ | 1 |
| 2023-07-27 | 1.00″ | 1 |
| 2023-07-18 | 1.00″ | 1 |
| 2023-06-27 | 1.25″ | 1 |
| 2022-06-24 | 1.50″ | 4 |
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: Jones County (40 hail days), Todd County (58) and Tripp County (47). Every one of them takes more hail than Mellette County.
Jones County · Todd County · Tripp County
Back to the South Dakota hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Mellette County, South Dakota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.