◆ (HLN)HELENA RGNL ARP, MT HAIL HISTORY · LEWIS AND CLARK COUNTY
(Hln)Helena Rgnl Arp, MT hail history & hail map
(Hln)Helena Rgnl Arp, Montana has had 6 hail events in the past 5 years, with hail up to 1.00″ (Quarter). Most recent: Jun 25, 2026. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
6Hail 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 (Hln)Helena Rgnl Arp, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in (Hln)Helena Rgnl Arp
| Date | Peak hail | Sources |
|---|---|---|
| Jun 25, 2026 | 1.00″ Quarter | 1 ground report (max 1.00″) |
| Sep 11, 2024 | 0.70″ Small | 1 ground report (max 0.70″) |
| Jul 3, 2024 | 0.50″ Small | 1 ground report (max 0.50″) |
| Sep 8, 2023 | 0.75″ Penny | 1 ground report (max 0.75″) |
| May 22, 2023 | 0.75″ Penny | 1 ground report (max 0.75″) |
| Jul 4, 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 (Hln)Helena Rgnl Arp (46.610, -112.020) 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.