Union County, IA hail & severe wind history
113 storm reports on file for Union County between 2010-05-25 and 2025-09-16 — 66 hail and 47 severe thunderstorm wind. That averages 7.1 reports a year, and Jun is the busiest month.
At a glance
- Most recent hail report: Sep 16, 2025 — 0.88" (nickel), 2.95 mi WNW of Afton. Last quarter-size (1") or larger: Apr 17, 2025, 1".
- Hail was reported on 36 days since 2010 — about 2.4 hail days a year.
- Largest hail on record: 3" (teacup) on Jun 18, 2021.
- Union County has more hail reports than 61% of the 99 Iowa counties we cover.
Search every Union County report
Check a single date first, or filter the full record below — pick a year, narrow to a month, or drag the hail-size slider to see only the larger stones (1", quarter size, is the National Weather Service severe threshold).
Loading Union County storm reports…
Worst storm days in Union County
| Date | Reports that day | Largest hail | Peak gust |
|---|---|---|---|
| 2024-04-30 | 8 | 1.75" (golf ball) | 58 mph |
| 2012-04-14 | 5 | 1.75" (golf ball) | 79 mph |
| 2018-06-28 | 5 | — | 69 mph |
| 2023-06-17 | 4 | 1" (quarter) | 60 mph |
| 2022-06-07 | 4 | 0.88" (nickel) | 68 mph |
| 2023-07-12 | 4 | — | 63 mph |
| 2011-08-06 | 4 | — | 71 mph |
| 2022-09-17 | 3 | 1.75" (golf ball) | — |
| 2014-04-12 | 3 | 1.75" (golf ball) | — |
| 2013-05-20 | 3 | 1.75" (golf ball) | — |
Reports by year
Report counts are driven partly by how many people were around to report a storm, so recent years tend to look busier than the early 2010s. Treat the trend as a reporting trend, not purely a weather trend.
Notable large-hail events (2" and up)
| Date | Size | Near | What was reported |
|---|---|---|---|
| 2022-03-05 | 2.75" baseball | 3.71 mi W of Spaulding | Delayed Report. Golf ball to baseball hail reported. Report of numerous migratory birds killed by hail. Time estimated by radar. |
| 2021-06-20 | 2" hen egg | 4.43 mi NNW of Talmage | Trained spotter report of two inch hail. |
| 2021-06-18 | 3" teacup | .52 mi E of Lorimor | Public report via images on social media. Time estimated via radar. |
| 2019-06-25 | 2" hen egg | 1.73 mi NE of Kent | Trained spotter reported hail slightly larger than golf balls, as well as damage to flowers and crops. |
| 2017-06-15 | 2" hen egg | 3.71 mi E of Creston | Public reported up to 2 inch hail. Via social media and time estimated from radar. |
When does hail hit Union County?
Across 15 years of records, June produced the most reports (42), followed by the months either side of it. Monthly totals:
| Month | Reports | Share |
|---|---|---|
| January | 0 | 0.0% |
| February | 1 | 0.9% |
| March | 2 | 1.8% |
| April | 22 | 19.5% |
| May | 19 | 16.8% |
| June | 42 | 37.2% |
| July | 12 | 10.6% |
| August | 8 | 7.1% |
| September | 5 | 4.4% |
| October | 0 | 0.0% |
| November | 0 | 0.0% |
| December | 2 | 1.8% |
Neighboring counties
Counties that share a border with Union County (U.S. Census county adjacency), where we have storm records:
| County | Storm reports | Largest hail |
|---|---|---|
| Adair County, IA | 139 | 4" |
| Taylor County, IA | 128 | 2.75" |
| Clarke County, IA | 127 | 3.5" |
| Madison County, IA | 114 | 2.75" |
| Adams County, IA | 86 | 3" |
| Decatur County, IA | 70 | 2.5" |
| Ringgold County, IA | 63 | 3" |
Common questions about hail in Union County
- How often does it hail in Union County?
- Hail was reported on 36 separate days between 2010 and 2025, about 2.4 days a year, with June the busiest month for storm reports. 55 reports were quarter size (1") or larger.
- Does a report here mean hail hit my street?
- Not necessarily. Each report is one observation tied to a nearby landmark, and a county can be large. Storms also go unreported where few people live. Use the date check above to see what was reported nearby, and treat it as a starting point.
- How big is a 1.75" hailstone?
- Forecasters describe hail by everyday objects: 1" is a quarter, 1.75" a golf ball, 2.75" a baseball. The sizes in these reports are estimates made by the person reporting, not lab measurements.
- Where do I get the official record?
- All reports here come from the NOAA NCEI Storm Events Database, which you can search directly. For anything formal, use NOAA’s own records rather than this page.
Look up another place
About these numbers
Every row above is a report filed with the National Weather Service and archived in the NOAA NCEI Storm Events Database (FIPS 19175). Reports are eyewitness, trained-spotter and damage-survey observations, so they cluster near roads and towns and miss storms over empty country. Hail sizes are estimates. Damage figures are preliminary as filed and are never revised in this archive. Use this page for background, not for an insurance claim, a legal filing, or a roof assessment — for those, get the official record from NOAA directly.