SwathIQ / Hail map / Iowa

Iowa Hail Map & History

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.

570

hail days since 2010

132

days with 2″+ hail

hail days this year

4.25″

largest stone on record

Iowa storm date

Colored swath = NOAA MRMS radar-estimated hail size; dots = NOAA SPC reports in Iowa. Radar-indicated, not a guarantee of damage.

Working Iowa? Turn a storm into a route.

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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Hail history in Iowa

Since 2010, NOAA's Storm Prediction Center has logged 570 separate hail days in Iowa, including 132 days with hail 2″ or larger -- the size that routinely totals roofs. The largest stone on record here: 4.25″ on 2017-06-29 near 2 N SERGEANT BLUFF, WOODBURY. The most recent reported hail day was 2026-06-11. Major metros watched here: Des Moines, Cedar Rapids, Davenport.

Top Iowa counties by hail frequency

County	Hail days since 2010	Largest stone
POLK	44	3.25″
WEBSTER	34	2.50″
DALLAS	33	3.00″
WARREN	32	3.00″
PLYMOUTH	32	2.75″
POTTAWATTAMIE	31	3.50″

Recent Iowa hail days

Date	Max hail	Reports
2026-06-11	2.00″	14
2026-06-10	3.00″	9
2026-06-01	1.00″	1
2026-05-31	1.00″	1
2026-05-24	1.25″	2
2026-05-18	1.75″	9
2026-05-17	1.75″	7
2026-05-16	2.75″	14

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

How often does it hail in Iowa?

NOAA has logged 570 hail days in Iowa since 2010, including 132 days with 2″+ hail.

Is the Iowa hail map free?

Yes, no login. A free account adds door-knock address lists and CRM exports.

How far back does the data go?

NOAA SPC storm reports since 2010, with high-resolution MRMS radar swaths for recent storms.

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.