Iowa Hail Map & History
Iowa was hit as recently as 2026-09-08, 6 days ago. NOAA's Storm Prediction Center has logged 587 separate hail days in Iowa since 2010, across 5,061 individual storm reports. 139 of those days brought hail 2 inches or larger, and the largest stone on record is 4.5 inches on 2026-08-07 near Ryan, Delaware.
Iowa takes repeated late-spring and summer hail across Des Moines, Cedar Rapids, and the Quad Cities. Pick a date below to see the NOAA radar swath and reports, or check a specific address.
Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Iowa. Radar-indicated, not a guarantee of damage.
A free SwathIQ account -- hand-reviewed, invite within 24-48h -- pulls Iowa 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 ->Hail history in Iowa
Iowa averages 35 reported hail days a year across 17 years of NOAA archive, about 8 of them carrying hail 2″ or larger -- the size that routinely totals roofs. Major metros watched here: Des Moines, Cedar Rapids, Davenport.
When it hails in Iowa
Iowa's busiest hail month is June, with 136 of its 587 hail days on record. April through August holds 487 of them, 83% of the record.
| Month | Hail days since 2010 |
|---|---|
| January | 2 |
| February | 3 |
| March | 31 |
| April | 70 |
| May | 112 |
| June | 136 |
| July | 92 |
| August | 77 |
| September | 49 |
| October | 12 |
| November | 2 |
| December | 1 |
Top Iowa counties by hail frequency
| County | Hail days since 2010 | Largest stone |
|---|---|---|
| Polk | 56 | 3.25″ |
| Pottawattamie | 43 | 4.00″ |
| Warren | 43 | 3.00″ |
| Dallas | 40 | 3.00″ |
| Plymouth | 40 | 2.75″ |
| Sioux | 40 | 2.50″ |
Iowa hail history by county
93 Iowa counties have at least 13 NOAA hail days on record since 2010 -- enough archive signal for a page of their own. Ordered by hail days.
Polk County · Pottawattamie County · Warren County · Dallas County · Plymouth County · Sioux County · Linn County · Cerro Gordo County · Webster County · Woodbury County · Story County · Harrison County · O'Brien County · Benton County · Clarke County · Jasper County · Johnson County · Kossuth County · Page County · Taylor County · Clay County · Lee County · Marion County · Scott County · Fremont County · Lyon County · Mills County · Union County · Cherokee County · Floyd County · Hancock County · Van Buren County · Adair County · Dubuque County · Boone County · Calhoun County · Guthrie County · Marshall County · Monona County · Montgomery County · Cedar County · Palo Alto County · Shelby County · Washington County · Black Hawk County · Butler County · Clinton County · Greene County · Keokuk County · Madison County · Cass County · Clayton County · Dickinson County · Fayette County · Iowa County · Franklin County · Humboldt County · Pocahontas County · Ringgold County · Buchanan County · Des Moines County · Henry County · Ida County · Jones County · Muscatine County · Poweshiek County · Adams County · Bremer County · Buena Vista County · Sac County · Osceola County · Tama County · Winnebago County · Appanoose County · Crawford County · Jefferson County · Wapello County · Carroll County · Delaware County · Audubon County · Emmet County · Grundy County · Hardin County · Decatur County · Mahaska County · Monroe County · Wayne County · Hamilton County · Lucas County · Worth County · Wright County · Mitchell County · Winneshiek County
Recent Iowa hail days
| Date | Max hail | Reports |
|---|---|---|
| 2026-09-08 | 2.25″ | 8 |
| 2026-09-06 | 1.25″ | 2 |
| 2026-09-04 | 1.75″ | 4 |
| 2026-09-01 | 1.00″ | 1 |
| 2026-08-12 | 1.25″ | 1 |
| 2026-08-11 | 1.00″ | 2 |
| 2026-08-08 | 2.50″ | 4 |
| 2026-08-07 | 4.50″ | 19 |
How to read the Iowa map
The colored swath is NOAA's MRMS radar estimate of the largest hail in each ~1 km cell; the dots are individual SPC ground reports. Yellow is around an inch, red is 1.5 to 2″, and purple is 2″ and up -- see how hail size maps to roof damage. Click any spot on the map to see the hail history at that point, or look up a full street address on the hail history by address tool. Today's nationwide activity is on today's hail report.
Nearby states
Illinois · North Dakota · Arkansas · New Mexico · Wyoming · North Carolina
FAQ
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Data & method: NOAA/NWS Storm Prediction Center reports + NOAA MRMS MESH radar, Iowa only. Radar-indicated and observation-based -- informational only, not a guarantee of damage or a valid claim.