◆ ROUNDUP ARPT, MT HAIL HISTORY · MUSSELSHELL COUNTY
Roundup Arpt, MT hail history & hail map
Roundup Arpt, Montana has had 3 hail events in the past 5 years, with hail up to 2.25″ (Golf Ball). Most recent: Jul 15, 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
2.25″Largest recorded hail · Golf Ball
1.75″Largest ground report (within 3 mi)
2.25″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Roundup Arpt, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Roundup Arpt
| Date | Peak hail | Sources |
|---|---|---|
| Jul 15, 2026 | 0.75″ Penny | Radar 0.75″ |
| Jul 29, 2025 | 2.25″ Golf Ball | Radar 2.25″ · 1 ground report (max 1.75″) |
| May 26, 2023 | 0.25″ Small | 1 ground report (max 0.25″) |
More Montana hail history
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Events count days with NOAA MRMS radar hail over Roundup Arpt (46.470, -108.640) 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.