Warren County, Iowa Hail Map & History
Warren County was hit as recently as 2026-10-08, 22 days ago. Warren County is hit in most years, and usually several times over. 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 2020-05-14 near New Virginia.
Hail size, inches
- 0.25 in, pea
- 0.75 in, penny
- 1 in, quarter
- 1.25 in, half dollar
- 1.5 in, ping pong ball
- 1.75 in, golf ball
- 2 in, hen egg
- 2.5 in, tennis ball
- 3 in and up, teacup
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 2026-10-08, around Cumming. A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Warren 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 ->How often it hails in Warren County
NOAA's Storm Prediction Center has logged 44 separate hail days here since 2010 -- 2.6 a year over 17 years of record. Those days carry 95 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 7 hail days. The last five years have run hotter than the long-run rate: 17 days since 2022, against 2.2 a year before that.
Most hail here stays under 2 inches: only 4 of the 44 days on record passed it, 9%, the last on 2023-04-04. Those big days do not follow the county's usual calendar: most of them fall in April, not June. 12 of the 44 days reached golf-ball size, 1.75 inches or bigger.
Across the whole of Iowa, see the Iowa hail map and history.
Hardest-hit places in Warren County
Reports cluster nearest Indianola -- 15 of the county's 44 hail days -- then New Virginia (9), Cumming (9), Lacona (6) and Carlisle (5). Beyond those, NOAA names Norwalk, Saint Marys, Milo, Sandyville, Martensdale, Ackworth and Hartford on more than one hail day apiece.
| Place | Hail days since 2010 | Largest stone |
|---|---|---|
| New Virginia | 5 | 3.00″ |
| Carlisle | 4 | 1.75″ |
| Indianola | 4 | 1.75″ |
| Milo | 3 | 1.75″ |
| 7 E New Virginia | 3 | 1.25″ |
When it hails in Warren County
The season runs March through July: 37 of the 44 hail days on record fall in those 5 months (84%). June is the single busiest month, with 12 of them (27%). That peak sits inside the window rather than at either end. Hail has also been reported in February, August, September and October, outside that window. January, November and December are the only months that have never produced a reported hail day.
| Month | Hail days |
|---|---|
| February | 1 |
| March | 4 |
| April | 11 |
| May | 6 |
| June | 12 |
| July | 4 |
| August | 1 |
| September | 2 |
| October | 3 |
Recent Warren County hail days
That day put 4 reports on the map, the biggest 1.75 inches near Cumming. 2 hail days have already been reported this year.
| Date | Max hail | Reports |
|---|---|---|
| 2026-10-08 | 1.75″ | 4 |
| 2026-04-17 | 1.25″ | 1 |
| 2025-04-17 | 1.00″ | 2 |
| 2024-10-24 | 1.00″ | 1 |
| 2024-10-03 | 1.00″ | 1 |
| 2024-07-24 | 1.00″ | 1 |
| 2024-06-25 | 1.75″ | 3 |
| 2024-05-23 | 1.00″ | 1 |
How to read the Warren County map
The colored swath is NOAA's MRMS radar estimate of the largest hail per ~1 km cell; the dots are SPC ground reports. Deep violet is about an inch, the violet grows lighter as the hail grows, and pale lilac to near-white is 2″ and up (hail size vs roof damage). On this county's worst day the reports reached 3 inches, which is the pale lilac band. Look up a street address with the hail history by address tool.
Nearby counties
The nearest counties with a page of their own: Polk County (56 hail days), Madison County (24) and Clarke County (33). Warren County sits in between.
Polk County · Madison County · Clarke County
Back to the Iowa hail map or the U.S. hail map.
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Warren County, Iowa only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.