South Dakota was hit as recently as 2026-07-30, 1 day ago. NOAA's Storm Prediction Center has logged 827 separate hail days in South Dakota since 2010, across 6,344 individual storm reports. 252 of those days brought hail 2 inches or larger, and the largest stone on record is 6 inches on 2015-06-19 near Nisland, Butte.
South Dakota pairs eastern hail alley (Sioux Falls) with Black Hills upslope storms near Rapid City. Pick a date below to see the NOAA radar swath and reports, or check a specific address.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in South Dakota. Radar-indicated, not a guarantee of damage.
A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls South Dakota 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 ->South Dakota averages 49 reported hail days a year across 17 years of NOAA archive, about 15 of them carrying hail 2″ or larger -- the size that routinely totals roofs. Major metros watched here: Sioux Falls, Rapid City, Aberdeen.
South Dakota's busiest hail month is July, with 242 of its 827 hail days on record. May through August holds 719 of them, 87% of the record.
| Month | Hail days since 2010 |
|---|---|
| March | 5 |
| April | 32 |
| May | 100 |
| June | 211 |
| July | 242 |
| August | 166 |
| September | 64 |
| October | 7 |
| County | Hail days since 2010 | Largest stone |
|---|---|---|
| Pennington | 224 | 4.50″ |
| Custer | 158 | 4.25″ |
| Meade | 151 | 4.00″ |
| Lawrence | 121 | 4.50″ |
| Fall River | 94 | 4.25″ |
| Harding | 81 | 4.25″ |
67 South Dakota counties have at least 13 NOAA hail days on record since 2010 -- enough archive signal for a page of their own. Ordered by hail days.
Pennington County · Custer County · Meade County · Lawrence County · Fall River County · Harding County · Perkins County · Butte County · Jackson County · Brown County · Todd County · Lyman County · Oglala Lakota County · Dewey County · Bennett County · Corson County · Charles Mix County · Hand County · Tripp County · Stanley County · Haakon County · Day County · Spink County · Edmunds County · McPherson County · Hutchinson County · Jones County · Walworth County · Codington County · Minnehaha County · Yankton County · Beadle County · Gregory County · Bon Homme County · Hughes County · McCook County · Brule County · Ziebach County · Mellette County · Clark County · Lincoln County · Aurora County · Faulk County · Hamlin County · Shannon County · Campbell County · Hyde County · Brookings County · Lake County · Potter County · Union County · Roberts County · Turner County · Clay County · Sully County · Kingsbury County · Deuel County · Grant County · Douglas County · Davison County · Jerauld County · Marshall County · Moody County · Buffalo County · Sanborn County · Hanson County · Miner County
| Date | Max hail | Reports |
|---|---|---|
| 2026-07-30 | 1.00″ | 1 |
| 2026-07-25 | 2.50″ | 3 |
| 2026-07-24 | 2.00″ | 6 |
| 2026-07-07 | 1.00″ | 5 |
| 2026-07-06 | 1.75″ | 2 |
| 2026-07-04 | 2.25″ | 9 |
| 2026-07-03 | 1.75″ | 20 |
| 2026-07-02 | 3.00″ | 19 |
The colored swath is NOAA's MRMS radar estimate of the largest hail in each ~1 km cell; the dots are individual SPC ground reports. Yellow is around an inch, red is 1.5 to 2″, and purple is 2″ and up -- see how hail size maps to roof damage. Click any spot on the map to see the hail history at that point, or look up a full street address on the hail history by address tool. Today's nationwide activity is on today's hail report.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, South Dakota only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.