Iowa hail map — September 16, 2025
NOAA radar detected hail of an inch or more over 4 Iowa cities on September 16, 2025. The largest stones — 1.00″, quarter size — fell over Waterloo.
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- The September 16, 2025 swath — and every other storm since 2023 across Iowa
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- Cities hit
- 4
- in Iowa
- Largest stone
- 1.00″
- quarter size
- Impact rating
- 3/10
- from stone size
Sizes come from NOAA radar, which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.
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Iowa cities hit on September 16, 2025
What people on the ground measured in Iowa on September 16, 2025
12 reports filed with the National Weather Service — 3 from trained observers or officials. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.
- 1.75″ golf ball size Public1 SE Marble Rock, IA5:19 PM CDTFloyd County
Report from mPING: Golf Ball (1.75 in.).
- 1.75″ golf ball size Public3 NNW Hartley, IA9:42 PM CDTO'Brien County
Hail mostly pea to dime, but several stones from quarter up to golf ball size.
- 1.25″ half dollar size Public2 SE Waterloo, IA4:00 PM CDTBlack Hawk County
Delayed report via social media.
- 1.25″ half dollar size Public3 W Havelock, IA5:25 PM CDTPocahontas County
Delayed report. Pictures of hail up to half-dollar sized.
- 1.25″ half dollar size Emergency Mngr4 NW Sanborn, IA8:25 PM CDTO'Brien County
- 1.00″ quarter size Public6 E Voorhies, IA5:00 AM CDTBlack Hawk County
Delayed report relayed by social media. Time estimated from radar.
- 1.00″ quarter size PublicHansell, IA5:37 AM CDTFranklin County
Delayed report. Relayed via social media. Time estimated from radar.
- 1.00″ quarter size Trained Spotter1 SW Evansdale, IA3:37 PM CDTBlack Hawk County
- 1.00″ quarter size Trained Spotter1 ENE Waterloo, IA3:45 PM CDTBlack Hawk County
Sheets of dime to quarter size hail.
- 1.00″ quarter size PublicSwaledale, IA4:25 PM CDTCerro Gordo County
Reported from the public library.
- 1.00″ quarter size Public1 E Charles City, IA6:05 PM CDTFloyd County
Report from mPING: Quarter (1.00 in.).
- 1.00″ quarter size PublicCharles City, IA6:05 PM CDTFloyd County
Report provided via social media.
Showing the 12 largest of 21 hail reports filed that day.
Reports come from the National Weather Service Local Storm Report feed, ingested every 15 minutes. A report records where the observer was, not the full extent of the swath — treat it as evidence about the storm, not about any one roof.
Other Iowa hail days
Shopping for a hail app to work Iowa?
This page is one storm. If you are deciding which tool to work Iowa with all season, these compare the ones roofers actually buy — with every price taken from the vendor's own site and linked.
- Best hail tracking apps, comparedHailMate, HailTrace, Hail Recon, HailStrike and RadarScope — every published price sourced and linked, and who each one is genuinely right for.
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Iowa hail on September 16, 2025
NOAA radar put hail of an inch or more over 4 Iowa cities that day. The largest stones — 1.00 inches, quarter size — were over Waterloo. Every city hit is listed above with its own stone size.