Hail in O'Brien County, Iowa
Radar recorded hail of 1 inch or larger in O'Brien County on 45 days since October 2020. That is more than 79% of US counties. It ranks 18 of 99 in Iowa.
The largest radar estimate was 3.95 inches on July 25, 2021. The most recent 1-inch day was August 8, 2026. Radar estimates and ground reports often differ, so see how they compare.
See the county center on the map
Days of 1-inch hail by year
| Year | Days |
|---|---|
| 2020 (from October) | 0 |
| 2021 | 9 |
| 2022 | 10 |
| 2023 | 10 |
| 2024 | 5 |
| 2025 | 5 |
| 2026 | 6 |
Largest hail days
| Storm day | Radar estimate |
|---|---|
| July 25, 2021 | 3.95 in |
| May 6, 2023 | 3.45 in |
| August 2, 2021 | 2.95 in |
| July 14, 2022 | 2.8 in |
| July 24, 2021 | 2.55 in |
| July 25, 2023 | 2.35 in |
Ground reports
Within this area, storm spotters and weather offices logged 37 hail reports since October 2020, and 30 tornadoes started here since 1950.
Figures cover a circle with the same land area as the county, centered on it, so edges are approximate.
Most hail days in Iowa
- Franklin County: 63 days
- Plymouth County: 61 days
- Mitchell County: 58 days
- Story County: 58 days
- Woodbury County: 56 days
- Adair County: 55 days