◆ WATERLOO, IA HAIL HISTORY · BLACK HAWK COUNTY
Waterloo, IA hail history & hail map
Waterloo, Iowa has had 12 hail events in the past 5 years, with hail up to 3.00″ (Baseball). Most recent: Apr 17, 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
3.00″Largest recorded hail · Baseball
3.00″Largest ground report (within 3 mi)
1.25″Largest radar-estimated hail
Radar hail swaths (NOAA MRMS MESH) in the past 5 years over Waterloo, shaded by hail size; blue dots are ground reports.
Recent hail storm dates in Waterloo
| Date | Peak hail | Sources |
|---|---|---|
| Apr 17, 2026 | 0.38″ Small | 1 ground report (max 0.38″) |
| Apr 14, 2026 | 2.50″ Tennis Ball | Radar 1.25″ · 3 ground reports (max 2.50″) |
| Sep 16, 2025 | 1.25″ Half Dollar | Radar 0.75″ · 4 ground reports (max 1.25″) |
| Apr 17, 2025 | 0.25″ Small | 1 ground report (max 0.25″) |
| Mar 19, 2025 | 0.88″ Nickel | 2 ground reports (max 0.88″) |
| Oct 24, 2024 | 0.75″ Penny | 3 ground reports (max 0.75″) |
| May 19, 2024 | 0.25″ Small | 1 ground report (max 0.25″) |
| Jun 25, 2023 | 3.00″ Baseball | Radar 1.25″ · 14 ground reports (max 3.00″) |
| Sep 17, 2022 | 0.50″ Small | 1 ground report (max 0.50″) |
| Sep 3, 2022 | 0.50″ Small | 1 ground report (max 0.50″) |
| Apr 28, 2022 | 0.10″ Small | 1 ground report (max 0.10″) |
| Dec 26, 2021 | 0.10″ Small | 1 ground report (max 0.10″) |
More Iowa hail history
Events count days with NOAA MRMS radar hail over Waterloo (42.470, -92.330) 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.