◆ GREGORY ARPT, SD HAIL HISTORY · GREGORY COUNTY
Gregory Arpt, SD hail history & hail map
Gregory Arpt, South Dakota has had 10 hail events in the past 5 years, with hail up to 2.75″ (Baseball). Most recent: Sep 1, 2026. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
10Hail events in the past 5 years
2.75″Largest recorded hail · Baseball
2.75″Largest ground report (within 3 mi)
1.50″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Gregory Arpt, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Gregory Arpt
| Date | Peak hail | Sources |
|---|---|---|
| Sep 1, 2026 | 0.75″ Penny | Radar 0.75″ |
| Aug 3, 2025 | 1.00″ Quarter | Radar 1.00″ |
| Jul 28, 2025 | 1.50″ Ping Pong Ball | Radar 1.50″ |
| Jul 15, 2025 | 1.25″ Half Dollar | Radar 1.25″ · 1 ground report (max 1.25″) |
| Jun 29, 2025 | 1.00″ Quarter | Radar 1.00″ |
| Aug 26, 2024 | 1.50″ Ping Pong Ball | Radar 1.50″ |
| Aug 25, 2024 | 2.75″ Baseball | 2 ground reports (max 2.75″) |
| Aug 18, 2024 | 1.50″ Ping Pong Ball | Radar 1.50″ |
| Sep 21, 2023 | 0.75″ Penny | Radar 0.75″ |
| Jul 19, 2023 | 1.00″ Quarter | Radar 1.00″ |
More South Dakota hail history
All South Dakota cities & hail days →
Events count days with NOAA MRMS radar hail over Gregory Arpt (43.160, -99.410) or an NWS / CoCoRaHS hail report within 3 miles. Data window: NOAA MRMS radar hail swaths Oct 2021 – Nov 2026; NWS / NCEI Storm Events reports Nov 2024 – Jul 2026; CoCoRaHS volunteer reports Oct 2021 – present. Radar hail sizes are estimates, not ground truth; hail at any single address can differ.