Hail history in Dewey County, SD
Hail of 1 inch or larger was reported in Dewey County on 5 days between Jan 1, 2025 and Oct 26, 2026. The largest was 1.75 in (golf ball) on Aug 24, 2026, near 7 WNW Swan Creek Rec Ar.
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Every hail day in Dewey County
| Storm day | Largest hail | Reports | Near | |
|---|---|---|---|---|
| Aug 24, 2026 | 1.75 in (golf ball) | 1 | 7 WNW Swan Creek Rec Ar | Report for this date → |
| Jun 3, 2026 | 1.00 in (quarter) | 2 | 3 NE Green Grass | Report for this date → |
| Jul 26, 2025 | 1.50 in (ping pong ball) | 1 | 1 W Promise | Report for this date → |
| Jul 14, 2025 | 1.00 in (quarter) | 1 | Timber Lake | Report for this date → |
| Jun 14, 2025 | 1.00 in (quarter) | 1 | Glencross | Report for this date → |
When hail falls in Dewey County
Where hail was reported
Places named in the reports, given as distance and direction from the nearest town, as the National Weather Service logs them.
- 1 W Promise1 report
- 2 NE White Horse1 report
- 3 NE Green Grass1 report
- 7 WNW Swan Creek Rec Ar1 report
- Glencross1 report
- Timber Lake1 report
More hail history in South Dakota
See a sample satellite hail report →
Source and method
NOAA Storm Prediction Center preliminary local storm reports of hail 1 inch or larger, Jan 1, 2025 to Oct 26, 2026 (updated Oct 27, 2026). Dates are SPC storm days, which run from 12:00 UTC to 12:00 UTC (about 7 a.m. to 7 a.m. Central), so a late-night storm appears on the day it started. Reports come from spotters, the public and NWS offices: they can be revised, and a storm nobody reported is missing. SPC storm reports.
A Skybridge report goes further for one address and date: GOES satellite cloud-top and lightning data, NOAA MRMS radar hail size and these storm reports within 50 km, in one document reviewed by a person, with a code anyone can verify.