◆ GANN VLY, SD HAIL HISTORY · BUFFALO COUNTY
Gann Vly, SD hail history & hail map
Gann Vly, South Dakota has had 3 hail events in the past 5 years, with hail up to 3.00″ (Baseball). Most recent: Jul 2, 2026. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
3Hail events in the past 5 years
3.00″Largest recorded hail · Baseball
3.00″Largest ground report (within 3 mi)
2.00″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Gann Vly, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Gann Vly
| Date | Peak hail | Sources |
|---|---|---|
| Jul 2, 2026 | 3.00″ Baseball | Radar 2.00″ · 2 ground reports (max 3.00″) |
| Jun 22, 2025 | 0.75″ Penny | Radar 0.75″ |
| Jul 30, 2024 | 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 Gann Vly (43.940, -99.040) 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.