The most recent reported hail day was 2025-04-17 -- 1 year ago, with nothing reported since. Adams County is hit in about half the years on record. The largest stone on record here is 3 inches, a teacup and 3 times the National Weather Service's 1 inch severe criterion, reported on 2013-05-19 near Nw Carbon.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Iowa. Radar-indicated, not a guarantee of damage.
The last hail here fell on 2025-04-17, around Corning. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Adams County addresses inside a hail swath above your size threshold into a door-knock list you can export, scoped to your approved markets.
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See call-center options ->NOAA's Storm Prediction Center has logged 20 separate hail days here since 2010 -- 1.2 a year over 17 years of record. Those days carry 45 separate reports between them, two or three on a typical one. 7 of those 17 years produced none at all. The busiest single year was 2014, with 3 hail days. The last five years track the long-run rate, with 5 days since 2022.
4 of the 20 days reached 2 inches or more -- 20%, or about one hail day in 5, the last on 2014-09-09. Those big days do not follow the county's usual calendar: most of them fall in May, not April. More than half of every hail day on record here -- 11 of 20 -- reached golf-ball size, 1.75 inches or bigger.
Across the whole of Iowa, see the Iowa hail map and history.
Reports cluster nearest Corning -- 11 of the county's 20 hail days -- then Prescott (6), Carbon (5), Nodaway (3) and Cromwell (3). That one town is named on 55% of them. Beyond those, NOAA names Lenox and Orient on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| 3 Wsw Carbon | 2 | 2.50″ |
| 5 SW Orient | 2 | 1.75″ |
| Nodaway | 2 | 1.75″ |
| Prescott | 2 | 1.75″ |
| Corning | 2 | 1.50″ |
The season runs April through September: 18 of the 20 hail days on record fall in those 6 months (90%). April is the single busiest month, with 6 of them (30%). That peak opens the window: the season starts at its worst and eases off from there. Hail has also been reported in March, outside that window. Reports span 6 of the 12 calendar months; the other 6 have never produced one.
| Month | Hail days |
|---|---|
| March | 2 |
| April | 6 |
| May | 3 |
| June | 3 |
| August | 2 |
| September | 4 |
That day put 3 reports on the map, the biggest 1.5 inches near Corning. No hail day has been reported here yet this year.
| Date | Max hail | Reports |
|---|---|---|
| 2025-04-17 | 1.50″ | 3 |
| 2024-09-24 | 1.25″ | 1 |
| 2024-04-30 | 1.00″ | 2 |
| 2022-09-17 | 1.25″ | 3 |
| 2022-03-05 | 1.75″ | 2 |
| 2019-06-25 | 1.75″ | 4 |
| 2015-04-08 | 1.75″ | 2 |
| 2014-09-09 | 2.00″ | 2 |
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Yellow is about an inch, red 1.5 to 2″, purple 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 3 inches, which is the purple band. Look up a street address with the hail history by address tool.
The nearest counties with a page of their own: Taylor County (32 hail days), Adair County (28) and Union County (30). Every one of them takes more hail than Adams County.
Taylor County · Adair County · Union County
Back to the Iowa hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Adams County, Iowa only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.