Grand Forks County was hit as recently as 2026-07-24, 7 days ago. Grand Forks County is hit in most years, and usually several times over. 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 2015-06-27 near Northwood.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in North Dakota. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2026-07-24, around Manvel. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Grand Forks 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 45 separate hail days here since 2010 -- 2.6 a year over 17 years of record. Those days carry 115 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 2020, with 7 hail days. The last five years track the long-run rate, with 10 days since 2022.
Most hail here stays under 2 inches: only 4 of the 45 days on record passed it, 9%, the last on 2025-07-14. They land in the same month as everything else, July. 16 of the 45 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of North Dakota, see the North Dakota hail map and history.
Reports cluster nearest Grand Forks -- 13 of the county's 45 hail days -- then Manvel (8), Thompson (8), Larimore (7) and Arvilla (6). Beyond those, NOAA names Northwood, Holmes, Emerado, Gilby, Niagara, Grand Forks Afb, Hatton, Mekinock and Orr on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Larimore | 6 | 1.75″ |
| Arvilla | 4 | 1.75″ |
| Grand Forks | 4 | 1.25″ |
| Manvel | 4 | 1.00″ |
| Holmes | 3 | 2.50″ |
The season runs June through August: 39 of the 45 hail days on record fall in those 3 months (87%). July is the single busiest month, with 17 of them (38%). That peak sits inside the window rather than at either end. Hail has also been reported in April, May 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 | 4 |
| June | 14 |
| July | 17 |
| August | 8 |
| September | 1 |
That day put 1 report on the map, the biggest 1 inch near Manvel. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-24 | 1.00″ | 1 |
| 2026-06-03 | 1.00″ | 1 |
| 2025-07-14 | 2.00″ | 2 |
| 2025-07-07 | 1.75″ | 7 |
| 2022-07-22 | 1.00″ | 1 |
| 2022-07-18 | 1.00″ | 2 |
| 2022-06-24 | 1.75″ | 1 |
| 2022-06-20 | 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 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: Traill County (25 hail days), Walsh County (28) and Steele County (24). Grand Forks County takes more hail than any of them.
Traill County · Walsh County · Steele County
Back to the North Dakota hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Grand Forks County, North Dakota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.