Hail HistoryHail history for Grundy County, IA
46 hail reports in Grundy County since 2006 on 30 days. The largest stones measured 2.5 in (tennis ball) on Aug 9, 2009.
Cities in Grundy County
Recent hail in Grundy County
| Date | Hail size | Where |
|---|---|---|
| Sep 22, 2025 | 1 in quarter | Dike 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 Grundy County by year
When hail season peaks in Grundy County
Damaging thunderstorm winds in Grundy County
66 reports of damaging thunderstorm wind in Grundy County since 2006, on 42 days. The strongest measured gust was 71 mph on Mar 14, 2025.
| Date | Strongest gust | Where |
|---|---|---|
| Jul 20, 2026 | damage reported | Holland, Dike 2 wind reports |
| Jul 3, 2025 | 60 mph, measured | Grundy Center 2 wind reports |
| Jun 20, 2025 | 62 mph, estimated | Ivester, Reinbeck 2 wind reports |
| Jun 11, 2025 | 58 mph, measured | Morrison 1 wind report |
| Mar 14, 2025 | 71 mph, measured | Grundy Center 1 wind report |
| Jun 18, 2024 | 58 mph, estimated | Wellsburg 1 wind report |
| May 24, 2024 | 58 mph, estimated | Wellsburg 1 wind report |
| May 8, 2024 | 58 mph, estimated | Reinbeck 1 wind report |
| Aug 27, 2022 | 58 mph, estimated | Conrad 1 wind report |
| Aug 10, 2020 | 70 mph, estimated | Reinbeck, Grundy Center 2 wind reports |
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 Grundy 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).