Iowa hail map — May 20, 2024
NOAA radar detected hail of an inch or more over 1 Iowa city on May 20, 2024. The largest stones — 1.00″, quarter size — fell over Sioux City.
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- The May 20, 2024 swath — and every other storm since 2023 across Iowa
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- Cities hit
- 1
- 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 May 20, 2024
What people on the ground measured in Iowa on May 20, 2024
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.
- 3.00″ baseball size Trained Spotter3 W Royal, IA7:44 PM CDTClay County
Report and photo from storm chaser via social media.
- 2.50″ hen egg size Trained Spotter2 NW Royal, IA7:40 PM CDTClay County
Golf ball to tennis ball sized hail, damage to skylight on camper, and lots of sticks/leaves down on the ground.
- 2.00″ hen egg size Public4 W Royal, IA7:39 PM CDTClay County
Report from mPING: Hen Egg (2.00 in.).
- 2.00″ hen egg size PublicRoyal, IA7:48 PM CDTClay County
Social media report with pictures and tape measure for reference.
- 2.00″ hen egg size PublicMallard, IA9:21 PM CDTPalo Alto County
Corrects previous hail report from Mallard. Slightly larger than golfball size. Time estimated from radar.
- 2.00″ hen egg size 911 Call Center3 N Harlan, IA9:49 PM CDTShelby County
- 1.75″ golf ball size PublicSanborn, IA6:58 PM CDTO'Brien County
- 1.75″ golf ball size PublicMallard, IA9:21 PM CDTPalo Alto County
Slightly larger than golfball size. Time estimated from radar.
- 1.50″ half dollar size PublicGreenville, IA8:15 PM CDTClay County
- 1.50″ half dollar size PublicWebb, IA8:32 PM CDTClay County
Hail pea to ping-pong ball size.
- 1.50″ half dollar size Emergency Mngr7 SSW Peterson, IA9:30 PM CDTCherokee County
Relayed report from member of the public. Radar estimated.
- 1.25″ half dollar size PUBLIC4 WNW LARRABEE, IA8:50 PM CDTCHEROKEE County
Showing the 12 largest of 23 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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- Hail map apps for roofers (and the Hail Recon alternative)Every storm on one map instead of loading dates one at a time — plus the canvassing and the whole claim, monthly, for what one state costs them a year.
- Best canvassing apps, comparedHailMate, SalesRabbit, SPOTIO, Knockio, RoofLink and Badger Maps — every published price sourced and linked, and two of them publish none.
Iowa hail on May 20, 2024
NOAA radar put hail of an inch or more over 1 Iowa city that day. The largest stones — 1.00 inches, quarter size — were over Sioux City. Every city hit is listed above with its own stone size.