◆ ROUNDUP, MT HAIL HISTORY · MUSSELSHELL COUNTY
Roundup, MT hail history & hail map
Roundup, Montana has had 8 hail events in the past 5 years, with hail up to 1.00″ (Quarter). Most recent: Jul 29, 2025. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
8Hail events in the past 5 years
1.00″Largest recorded hail · Quarter
1.00″Largest ground report (within 3 mi)
—Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Roundup, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Roundup
| Date | Peak hail | Sources |
|---|---|---|
| Jul 29, 2025 | 1.00″ Quarter | 2 ground reports (max 1.00″) |
| Jul 28, 2025 | 0.75″ Penny | 1 ground report (max 0.75″) |
| Jun 26, 2025 | 0.88″ Nickel | 3 ground reports (max 0.88″) |
| Apr 22, 2025 | 0.50″ Small | 1 ground report (max 0.50″) |
| May 17, 2024 | 0.38″ Small | 1 ground report (max 0.38″) |
| Jun 1, 2023 | 0.25″ Small | 1 ground report (max 0.25″) |
| May 26, 2023 | 0.25″ Small | 1 ground report (max 0.25″) |
| Apr 18, 2023 | 0.25″ Small | 1 ground report (max 0.25″) |
More Montana hail history
All Montana cities & hail days →
Events count days with NOAA MRMS radar hail over Roundup (46.450, -108.540) 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.