Tripp County was hit as recently as 2026-07-06, 25 days ago. Tripp County is hit in most years, and usually several times over. 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 2010-05-29 near Colome.
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 2026-07-06, around Witten. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Tripp 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 47 separate hail days here since 2010 -- 2.8 a year over 17 years of record. Those days carry 95 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 7 hail days. The last five years track the long-run rate, with 14 days since 2022.
Most hail here stays under 2 inches: only 2 of the 47 days on record passed it, 4%, the last on 2020-08-04. Those big days do not follow the county's usual calendar: most of them fall in May, not July. 12 of the 47 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of South Dakota, see the South Dakota hail map and history.
Reports cluster nearest Colome -- 11 of the county's 47 hail days -- then Winner (10), Clearfield (9), Keyapaha (8) and Hamill (8). Beyond those, NOAA names Wewela, Witten, Carter, Millboro and Ideal on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Colome | 5 | 2.75″ |
| Clearfield | 3 | 1.75″ |
| 5 S Keyapaha | 3 | 1.50″ |
| 2 Ese Winner | 2 | 1.75″ |
| 2 Sw Keyapaha | 2 | 1.75″ |
The season runs May through August: 44 of the 47 hail days on record fall in those 4 months (94%). July is the single busiest month, with 16 of them (34%). That peak sits inside the window rather than at either end. Hail has also been reported in April and September, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| April | 1 |
| May | 7 |
| June | 10 |
| July | 16 |
| August | 11 |
| September | 2 |
That day put 1 report on the map, the biggest 1.75 inches near Witten. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-06 | 1.75″ | 1 |
| 2026-06-03 | 1.25″ | 3 |
| 2025-08-03 | 1.50″ | 1 |
| 2025-07-28 | 1.00″ | 2 |
| 2025-07-27 | 1.00″ | 2 |
| 2025-07-15 | 1.50″ | 3 |
| 2025-07-07 | 1.00″ | 2 |
| 2024-08-25 | 1.00″ | 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 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, over the state line included: Gregory County (36 hail days), Lyman County (54), Todd County (58) and Keya Paha County, Nebraska (35). Tripp County sits in between.
Gregory County · Lyman County · Todd County · Keya Paha County, Nebraska
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, Tripp County, South Dakota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.