How big was the hail on July 15, 2024?

The maximum estimated stone size anywhere in Iowa that day was 2.00 inches. Sizes vary street to street inside a single swath, so a city's figure is the largest radar estimated anywhere within about 5 miles of it.

Does this mean roofs were damaged?

Radar measures stone size, not damage. Whether a particular roof was damaged depends on stone size, wind direction, roof age and material — only an inspection settles it. These figures tell you where it is worth looking.

How do I see the actual swath on a map?

A HailMate plan puts the whole of Iowa on a real interactive map with this swath and three years of others already on it. $79/mo, and the canvassing tools come with it.

Iowa · July 15, 2024

Iowa hail map — July 15, 2024

Name: Iowa hail map — July 15, 2024
Creator: HailMate

NOAA radar detected hail of an inch or more over 6 Iowa cities on July 15, 2024. The largest stones — 2.00″, hen egg size — fell over Ames.

Hail swath map for Ames, IA on July 15, 2024 showing 2.00 inch hail. — Swath over Ames on July 15, 2024 — 2.00″ hail. Each city below has its own map for this storm.

Cities hit: 6; in Iowa
Largest stone: 2.00″; hen egg size
Impact rating: 7/10; from stone size

Sizes come from NOAA MRMS radar (MESH), which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.

Roofing contractors

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All of Iowa at street level, with this storm already on it
Three years of hail swaths, filterable by stone size
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Homeowners

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This page covers Iowa as a whole. Check your own address to see every storm on record for your roof — the date and the stone size for each one — and we'll email you the full report to keep.

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Iowa cities hit on July 15, 2024

Ames, IA2.00″ · hen egg Des Moines, IA1.50″ · half dollar West Des Moines, IA1.50″ · half dollar Ankeny, IA1.50″ · half dollar Urbandale, IA1.50″ · half dollar Johnston, IA1.50″ · half dollar

What people on the ground measured in Iowa on July 15, 2024

12 reports filed with the National Weather Service — 5 from trained spotters or officials. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.

2.50″ hen egg size Public
Vail, IA3:42 PM CDTCrawford County
Forward from broadcast media. Time estimated by radar.
2.00″ hen egg size Public
5 N Traer, IA3:36 PM CDTTama County
Relayed through broadcast media. Time estimated by radar.
2.00″ hen egg size Trained Spotter
Westside, IA3:48 PM CDTCrawford County
Spotter reported 2 inch hail in Westside. Delayed report.
1.25″ half dollar size Emergency Mngr
8 W Mount Auburn, IA4:10 PM CDTBenton County
Relayed by local emergency management.
1.25″ half dollar size Public
6 E Voorhies, IA4:35 PM CDTBlack Hawk County
Relayed by broadcast media.
1.00″ quarter size Trained Spotter
2 WSW Westside, IA3:48 PM CDTCrawford County
Pea to quarter-sized. Time estimated from radar.
1.00″ quarter size Park/Forest Srvc
7 N Dysart, IA3:55 PM CDTTama County
At Hickory Hills Park. Time estimated by radar. Report relayed from EMA.
1.00″ quarter size Public
Arcadia, IA3:56 PM CDTCarroll County
Spotter reported quarter sized hail in Arcadia. Delayed report.
1.00″ quarter size Trained Spotter
5 N Dysart, IA4:05 PM CDTTama County
Spotter submitted a photo of quarter sized hail 5 miles north of Dysart. Delayed report.
1.00″ quarter size Public
La Porte City, IA4:35 PM CDTBlack Hawk County
Relayed by broadcast media.
1.00″ quarter size Fire Dept/Rescue
Colo, IA5:24 PM CDTStory County
Nickel to quarter sized hail.
1.00″ quarter size Trained Spotter
1 NNW Monroe, IA6:18 PM CDTJasper County
Estimated winds of 70 mph in addition to the hail.

Showing the 12 largest of 20 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 states hit on July 15, 2024

Illinois7 cities · 1.50″Arizona1 city · 1.50″Louisiana1 city · 1.00″Georgia2 cities · 1.00″South Carolina2 cities · 1.00″Massachusetts1 city · 1.00″Ohio5 cities · 1.00″

The full US hail map for July 15, 2024 →

Other Iowa hail days

August 12, 20262 cities · 1.00″August 7, 20262 cities · 1.00″July 27, 20263 cities · 1.00″July 21, 20261 city · 1.00″July 20, 20267 cities · 1.50″July 4, 20261 city · 1.00″July 3, 20263 cities · 1.00″July 2, 20267 cities · 1.00″July 1, 20261 city · 1.50″June 30, 20261 city · 1.00″June 28, 20262 cities · 1.00″June 17, 20261 city · 1.00″

Every hail day across Iowa →

FAQ

Iowa hail on July 15, 2024

NOAA radar put hail of an inch or more over 6 Iowa cities that day. The largest stones — 2.00 inches, hen egg size — were over Ames. Every city hit is listed above with its own stone size.

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