Rock County was hit as recently as 2026-05-17, 75 days ago. Rock County is hit in most years. 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 2025-04-28 near Beaver Creek.
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 Magnolia. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Rock 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. They carry 39 reports in total: most hail days here are logged from a single spot. 4 of those 17 years produced none at all. The busiest single year was 2014, with 3 hail days. The last five years track the long-run rate, with 7 days since 2022.
Most hail here stays under 2 inches: only 2 of the 25 days on record passed it, 8%, the last on 2025-04-28. Those big days do not follow the county's usual calendar: most of them fall in April, not May. Golf-ball size is rarer still: 1.75 inches or more on 6 of the 25 days.
Across the whole of Minnesota, see the Minnesota hail map and history.
Reports cluster nearest Luverne -- 10 of the county's 25 hail days -- then Magnolia (4), Jasper (4), Beaver Creek (3) and Hardwick (3). That one town is named on 40% of them. Beyond those, NOAA names Steen on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Luverne | 3 | 1.00″ |
| Hardwick | 2 | 1.75″ |
| 1 N Magnolia | 2 | 1.25″ |
| 2 ENE Beaver Creek | 1 | 2.75″ |
| Magnolia | 1 | 2.50″ |
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 6 of them (24%). That peak opens the window: the season starts at its worst and eases off from there. 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 | 4 |
| May | 6 |
| June | 6 |
| July | 3 |
| August | 5 |
| September | 1 |
That day put 1 report on the map, the biggest 1.25 inches near Magnolia. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-05-17 | 1.25″ | 1 |
| 2026-04-13 | 1.50″ | 1 |
| 2025-09-21 | 1.25″ | 3 |
| 2025-04-28 | 2.75″ | 3 |
| 2023-07-25 | 1.00″ | 1 |
| 2023-07-13 | 2.50″ | 1 |
| 2022-05-28 | 1.00″ | 1 |
| 2021-08-28 | 1.75″ | 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: Pipestone County (21 hail days), Nobles County (33), Murray County (25), Lyon County, Iowa (30) and Minnehaha County, South Dakota (37). Rock County sits in between.
Pipestone County · Nobles County · Murray County · Lyon County, Iowa · Minnehaha 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, Rock County, Minnesota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.