◆ HELENA, AZ HAIL HISTORY · MARICOPA COUNTY
Helena, AZ hail history & hail map
Helena, Arizona has had 7 hail events in the past 5 years, with hail up to 1.00″ (Quarter). Most recent: Oct 21, 2026. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
7Hail events in the past 5 years
1.00″Largest recorded hail · Quarter
1.00″Largest ground report (within 3 mi)
1.00″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Helena, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Helena
| Date | Peak hail | Sources |
|---|---|---|
| Oct 21, 2026 | 1.00″ Quarter | 1 ground report (max 1.00″) |
| Nov 20, 2025 | 1.00″ Quarter | 9 ground reports (max 1.00″) |
| Nov 18, 2025 | 0.25″ Small | 2 ground reports (max 0.25″) |
| Sep 26, 2025 | 1.00″ Quarter | 3 ground reports (max 1.00″) |
| Sep 4, 2025 | 1.00″ Quarter | Radar 1.00″ |
| Mar 25, 2024 | 0.25″ Small | 1 ground report (max 0.25″) |
| Mar 4, 2022 | 0.25″ Small | 2 ground reports (max 0.25″) |
More Arizona hail history
All Arizona cities & hail days →
Events count days with NOAA MRMS radar hail over Helena (33.385, -111.893) 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.