◆ GREAT FALLS, MT HAIL HISTORY · CASCADE COUNTY
Great Falls, MT hail history & hail map
Great Falls, Montana has had 10 hail events in the past 5 years, with hail up to 2.50″ (Tennis Ball). Most recent: Jul 8, 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
2.50″Largest recorded hail · Tennis Ball
2.50″Largest ground report (within 3 mi)
0.75″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Great Falls, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Great Falls
| Date | Peak hail | Sources |
|---|---|---|
| Jul 8, 2026 | 0.50″ Small | 1 ground report (max 0.50″) |
| Aug 1, 2025 | 1.25″ Half Dollar | Radar 0.75″ · 2 ground reports (max 1.25″) |
| Jun 15, 2025 | 1.50″ Ping Pong Ball | 8 ground reports (max 1.50″) |
| Aug 23, 2024 | 0.50″ Small | 1 ground report (max 0.50″) |
| May 19, 2024 | 0.50″ Small | 3 ground reports (max 0.50″) |
| Sep 8, 2023 | 0.25″ Small | 1 ground report (max 0.25″) |
| Apr 18, 2023 | 0.75″ Penny | 2 ground reports (max 0.75″) |
| Jul 8, 2022 | 1.50″ Ping Pong Ball | 1 ground report (max 1.50″) |
| Jul 7, 2022 | 2.50″ Tennis Ball | 9 ground reports (max 2.50″) |
| May 3, 2022 | 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 Great Falls (47.520, -111.320) 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.