◆ LOUISVILLE, CO HAIL HISTORY · BOULDER COUNTY
Louisville, CO hail history & hail map
Louisville, Colorado has had 8 hail events in the past 5 years, with hail up to 1.25″ (Half Dollar). Most recent: Jul 12, 2025. Free hail map, storm dates and NWS/CoCoRaHS reports.
✓ Data compiled by a degreed meteorologist from NOAA & NWS sources
8Hail 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 Louisville, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Louisville
| Date | Peak hail | Sources |
|---|---|---|
| Jul 12, 2025 | 1.00″ Quarter | Radar 0.75″ · 2 ground reports (max 1.00″) |
| Jul 11, 2025 | 0.62″ Small | 1 ground report (max 0.62″) |
| Jun 17, 2025 | 1.25″ Half Dollar | Radar 1.25″ · 3 ground reports (max 1.00″) |
| May 18, 2025 | 1.00″ Quarter | Radar 1.00″ · 2 ground reports (max 0.50″) |
| Apr 1, 2025 | 0.38″ Small | 2 ground reports (max 0.38″) |
| May 31, 2024 | 0.88″ Nickel | 1 ground report (max 0.88″) |
| May 30, 2024 | 1.00″ Quarter | 1 ground report (max 1.00″) |
| Jul 21, 2023 | 0.75″ Penny | 3 ground reports (max 0.75″) |
More Colorado hail history
All Colorado cities & hail days →
Events count days with NOAA MRMS radar hail over Louisville (39.990, -105.150) 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.