◆ LYONS, CO HAIL HISTORY · BOULDER COUNTY
Lyons, CO hail history & hail map
Lyons, Colorado has had 12 hail events in the past 5 years, with hail up to 1.25″ (Half Dollar). Most recent: Jul 28, 2026. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
12Hail events in the past 5 years
1.25″Largest recorded hail · Half Dollar
1.00″Largest ground report (within 3 mi)
1.25″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Lyons, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Lyons
| Date | Peak hail | Sources |
|---|---|---|
| Jul 28, 2026 | 1.25″ Half Dollar | Radar 1.25″ · 2 ground reports (max 1.00″) |
| Jul 31, 2025 | 0.38″ Small | 1 ground report (max 0.38″) |
| Mar 29, 2025 | 0.10″ Small | 1 ground report (max 0.10″) |
| Jul 20, 2024 | 0.50″ Small | 1 ground report (max 0.50″) |
| May 27, 2023 | 0.38″ Small | 1 ground report (max 0.38″) |
| Oct 1, 2022 | 0.38″ Small | 1 ground report (max 0.38″) |
| Sep 17, 2022 | 0.38″ Small | 1 ground report (max 0.38″) |
| Jul 7, 2022 | 0.38″ Small | 1 ground report (max 0.38″) |
| Jun 29, 2022 | 0.38″ Small | 1 ground report (max 0.38″) |
| Jun 17, 2022 | 1.00″ Quarter | 1 ground report (max 1.00″) |
| Jun 16, 2022 | 0.50″ Small | 1 ground report (max 0.50″) |
| May 4, 2022 | 0.25″ Small | 1 ground report (max 0.25″) |
More Colorado hail history
All Colorado cities & hail days →
Events count days with NOAA MRMS radar hail over Lyons (40.230, -105.270) 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.