The most recent reported hail day was 2025-08-11, 354 days ago. Mahnomen County is hit in most years. The largest stone on record here is 2 inches, a hen egg and twice the National Weather Service's 1 inch severe criterion, reported on 2015-08-12 near Naytahwaush.
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 2025-08-11, around Naytahwaush. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Mahnomen 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 22 separate hail days here since 2010 -- 1.3 a year over 17 years of record. They carry 33 reports in total: most hail days here are logged from a single spot. 5 of those 17 years produced none at all. The busiest single year was 2018, with 3 hail days. The last five years track the long-run rate, with 5 days since 2022.
Most hail here stays under 2 inches: only 2 of the 22 days on record passed it, 9%, the last on 2015-08-12. Those big days do not follow the county's usual calendar: most of them fall in June, not August. 6 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 Waubun -- 5 of the county's 22 hail days -- then Bejou (4), Naytahwaush (4), Mahnomen (3) and Beaulieu (2). Beyond those, NOAA names Mahkonce and Tulaby Lake on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Waubun | 3 | 1.75″ |
| Tulaby Lake | 2 | 1.25″ |
| Naytahwaush | 2 | 1.00″ |
| 1 E Bejou | 1 | 2.00″ |
| 3 S Naytahwaush | 1 | 2.00″ |
The season runs May through August: 19 of the 22 hail days on record fall in those 4 months (86%). August is the single busiest month, with 8 of them (36%). That peak closes the window: the season builds all the way to its worst month and then stops. Hail has also been reported in September, outside that window. Reports span 5 of the 12 calendar months; the other 7 have never produced one.
| Month | Hail days |
|---|---|
| May | 3 |
| June | 5 |
| July | 3 |
| August | 8 |
| September | 3 |
That day put 1 report on the map, the biggest 1 inch near Naytahwaush. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-08-11 | 1.00″ | 1 |
| 2023-09-29 | 1.00″ | 1 |
| 2023-06-24 | 1.00″ | 1 |
| 2022-08-05 | 1.00″ | 1 |
| 2022-05-28 | 1.00″ | 1 |
| 2021-07-26 | 1.00″ | 1 |
| 2020-08-07 | 1.00″ | 1 |
| 2019-09-21 | 1.75″ | 3 |
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 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: Clearwater County (22 hail days), Becker County (55) and Norman County (31). Mahnomen County sits in between.
Clearwater County · Becker County · Norman County
Back to the Minnesota hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Mahnomen County, Minnesota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.