Hail HistoryHail history for Calhoun County, IA
76 hail reports in Calhoun County since 2006 on 43 days. The largest stones measured 4 in (grapefruit) on Jun 30, 2014.
Recent hail in Calhoun County
| Date | Hail size | Where |
|---|---|---|
| Jun 16, 2025 | 0.75 in penny | Pomeroy 1 hail report |
| Mar 14, 2025 | 1 in quarter | Knierim 1 hail report |
One row per day: the largest hail reported in the county that day, the places and the number of reports.
Hail days in Calhoun County by year
When hail season peaks in Calhoun County
Damaging thunderstorm winds in Calhoun County
87 reports of damaging thunderstorm wind in Calhoun County since 2006, on 38 days. The strongest measured gust was 72 mph on May 16, 2017.
| Date | Strongest gust | Where |
|---|---|---|
| Jul 8, 2026 | 52 mph, measured | Rockwell City, Lohrville 3 wind reports |
| Jul 28, 2025 | 62 mph, measured | Sherwood 1 wind report |
| Mar 14, 2025 | 68 mph, estimated | Lytton 2 wind reports |
| May 24, 2024 | 58 mph, estimated | Rockwell City, Jolley 2 wind reports |
| Aug 5, 2023 | 60 mph, estimated | Lake City 1 wind report |
| Apr 23, 2022 | 58 mph, estimated | Rands 1 wind report |
| Aug 10, 2020 | 81 mph, estimated | Rockwell City, Rands 3 wind reports |
| Sep 20, 2018 | 64 mph, estimated | Lavinia, Rockwell City 3 wind reports |
| Aug 26, 2018 | 70 mph, estimated | Manson 1 wind report |
| Jun 17, 2018 | 60 mph, estimated | Rockwell City 1 wind report |
Severe thunderstorm wind means gusts of 58 mph or more, or wind that caused damage. Measured gusts come from weather stations; estimated ones from spotters and damage surveys.
Filing a roof or car hail claim?
Insurers ask for the date of loss. The dates on this page are when hail was reported near Calhoun County; hail can hit one street and miss the next, so a report is not proof of damage at your address. A licensed roofer or your insurance adjuster can inspect the roof. Many policies set a time limit for filing a claim — check yours.
Data: NOAA NCEI Storm Events Database (final records through Jun 30, 2026) and National Weather Service Local Storm Reports (preliminary, since then).