The most recent reported hail day was 2026-04-23, 99 days ago. Pottawattamie County is hit in most years, and usually several times over. The largest stone on record here is 4 inches, a grapefruit and 4 times the National Weather Service's 1 inch severe criterion, reported on 2025-04-17 near Mcclelland.
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 2026-04-23, around Underwood. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Pottawattamie 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 42 separate hail days here since 2010 -- 2.5 a year over 17 years of record. Those days carry 97 separate reports between them, two or three on a typical one. Exactly one year since 2010 passed with no reported hail day at all. The busiest single year was 2024, with 5 hail days. The last five years have run hotter than the long-run rate: 18 days since 2022, against 2.0 a year before that.
9 of the 42 days reached 2 inches or more -- 21%, or about one hail day in 5, the last on 2025-04-17. They land in the same month as everything else, June. 19 of the 42 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Iowa, see the Iowa hail map and history.
Reports cluster nearest Council Bluffs -- 16 of the county's 42 hail days -- then Underwood (8), Oakland (7), Crescent (6) and Walnut (6). Beyond those, NOAA names Avoca, Mcclelland, Carson, Minden, Hancock, Macedonia, Neola, Carter Lake and Missouri Valley on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| Council Bluffs | 5 | 2.75″ |
| Avoca | 4 | 1.75″ |
| Walnut | 4 | 1.75″ |
| Hancock | 3 | 1.75″ |
| Oakland | 3 | 1.75″ |
The season runs April through August: 36 of the 42 hail days on record fall in those 5 months (86%). June is the single busiest month, with 11 of them (26%). That peak sits inside the window rather than at either end. Hail has also been reported in March, September and October, outside that window. Reports span 8 of the 12 calendar months; the other 4 have never produced one.
| Month | Hail days |
|---|---|
| March | 1 |
| April | 9 |
| May | 4 |
| June | 11 |
| July | 7 |
| August | 5 |
| September | 4 |
| October | 1 |
That day put 4 reports on the map, the biggest 1 inch near Underwood. 1 hail day has already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-04-23 | 1.00″ | 4 |
| 2025-04-24 | 1.75″ | 8 |
| 2025-04-23 | 1.00″ | 1 |
| 2025-04-17 | 4.00″ | 9 |
| 2024-07-07 | 1.75″ | 3 |
| 2024-06-25 | 2.50″ | 4 |
| 2024-06-12 | 2.50″ | 1 |
| 2024-05-20 | 1.75″ | 3 |
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 4 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, over the state line included: Mills County (28 hail days), Harrison County (35), Shelby County (25), Sarpy County, Nebraska (40) and Douglas County, Nebraska (65). Pottawattamie County sits in between.
Mills County · Harrison County · Shelby County · Sarpy County, Nebraska · Douglas County, Nebraska
Back to the Iowa hail map or the U.S. hail map.
Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Pottawattamie County, Iowa only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.