The most recent reported hail day was 2026-04-17, 105 days ago. Pierce County is hit in about half the years on record. The largest stone on record here is 3 inches, a teacup and 3 times the National Weather Service's 1 inch severe criterion, reported on 2022-09-20 near River Falls.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Wisconsin. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-04-17, around Bay City. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Pierce 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 19 separate hail days here since 2010 -- 1.1 a year over 17 years of record. They carry 31 reports in total: most hail days here are logged from a single spot. 7 of those 17 years produced none at all. The busiest single year was 2023, with 3 hail days. The last five years have run hotter than the long-run rate: 8 days since 2022, against 0.9 a year before that.
4 of the 19 days reached 2 inches or more -- 21%, or about one hail day in 5, the last on 2023-08-11. Those big days do not follow the county's usual calendar: most of them fall in August, not May. 7 of the 19 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Wisconsin, see the Wisconsin hail map and history.
Reports cluster nearest Ellsworth -- 5 of the county's 19 hail days -- then Bay City (4), Plum City (3), Elmwood (3) and River Falls (2). Beyond those, NOAA names Prescott, El Paso and Spring Valley on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| 4 NNW Bay City | 3 | 1.25″ |
| Ellsworth | 2 | 2.00″ |
| 2 E Ellsworth | 2 | 1.75″ |
| Elmwood | 2 | 1.75″ |
| Prescott | 2 | 1.25″ |
The season runs April through August: 18 of the 19 hail days on record fall in those 5 months (95%). May is the single busiest month, with 7 of them (37%). 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 | 4 |
| May | 7 |
| June | 3 |
| July | 1 |
| August | 3 |
| September | 1 |
That day put 2 reports on the map, the biggest 1.25 inches near Bay City. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-17 | 1.25″ | 2 |
| 2025-06-19 | 1.50″ | 1 |
| 2023-08-11 | 2.00″ | 2 |
| 2023-07-22 | 1.75″ | 2 |
| 2023-05-08 | 1.25″ | 3 |
| 2022-09-20 | 3.00″ | 2 |
| 2022-05-19 | 1.25″ | 1 |
| 2022-05-09 | 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 3 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: St. Croix County (29 hail days), Dunn County (23), Buffalo County (19), Goodhue County, Minnesota (23) and Wabasha County, Minnesota (17). Pierce County sits in between.
St. Croix County · Dunn County · Buffalo County · Goodhue County, Minnesota · Wabasha County, Minnesota
Back to the Wisconsin hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Pierce County, Wisconsin only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.