Morton County was hit as recently as 2026-06-29, 32 days ago. Morton 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 2024-07-29 near Crown Butte Lake.
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 2026-06-29, around Mandan. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Morton 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 64 separate hail days here since 2010 -- 3.8 a year over 17 years of record. Those days carry 172 separate reports between them, two or three on a typical one. No year since 2010 has gone by without at least one. The busiest single year was 2011, with 9 hail days. The last five years track the long-run rate, with 14 days since 2022.
Roof-killing hail is routine here: 16 of the 64 days reached 2 inches or more, 25% of them, the last on 2026-06-29. Those big days do not follow the county's usual calendar: most of them fall in June, not July. 27 of the 64 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 Mandan -- 20 of the county's 64 hail days -- then Glen Ullin (19), New Salem (16), Hebron (10) and Crown Butte Lake (9). Beyond those, NOAA names Almont, Flasher, Saint Anthony, Breien, St. Anthony, Huff, Sweet Briar Lake, Judson and Bismarck on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Mandan | 9 | 2.75″ |
| Hebron | 5 | 2.75″ |
| Glen Ullin | 5 | 2.00″ |
| 5 Nw New Salem | 4 | 2.00″ |
| New Salem | 4 | 1.00″ |
The season runs June through August: 53 of the 64 hail days on record fall in those 3 months (83%). July is the single busiest month, with 21 of them (33%). That peak sits inside the window rather than at either end. Hail has also been reported in March, May and September, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| March | 1 |
| May | 3 |
| June | 19 |
| July | 21 |
| August | 13 |
| September | 7 |
That day put 1 report on the map, the biggest 2 inches near Mandan. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-06-29 | 2.00″ | 1 |
| 2025-09-12 | 1.25″ | 2 |
| 2025-07-20 | 1.00″ | 1 |
| 2025-06-27 | 2.75″ | 3 |
| 2024-08-28 | 2.75″ | 4 |
| 2024-07-29 | 3.00″ | 5 |
| 2024-07-27 | 1.25″ | 2 |
| 2024-07-12 | 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: Oliver County (24 hail days), Burleigh County (54) and Grant County (56). Morton County takes more hail than any of them.
Oliver County · Burleigh County · Grant 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, Morton County, North Dakota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.