How big was the hail on May 7, 2024?

The maximum estimated stone size anywhere in the country that day was 2.00 inches, over Joliet, IL. 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.

Where does this hail data come from?

NOAA MRMS radar, specifically the Maximum Estimated Size of Hail product, ingested directly from the public NOAA archive. It runs about a quarter of an inch against ground truth, which makes it good for deciding where to look and not a substitute for an inspection.

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 a whole state on a real interactive map, with this swath and three years of others already on it. From $79/mo, and the canvassing tools come with it.

United States · May 7, 2024

Hail map — May 7, 2024

Name: US hail map — May 7, 2024
Creator: HailMate

NOAA radar detected hail of an inch or more over 42 cities across 3 states on May 7, 2024. The largest stones — 2.00″, hen egg size — fell over Joliet, IL.

Hail swath map for Joliet, IL on May 7, 2024 showing 2.00 inch hail. — Largest rendered swath of the day: Joliet, IL — 2.00″ hail. Each city below has its own map for this storm.

States hit: 3
Cities hit: 42
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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Your whole state at street level, with this storm already on it
Three years of hail swaths, filterable by stone size
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Homeowners

Did hail hit your address?

This page covers your area 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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Free, and no account needed to look it up. If hail did hit, you can ask for a free inspection from a vetted local roofer.

States hit on May 7, 2024

Every state where NOAA radar put an inch or more of hail over a city that day, biggest stone first.

Illinois32 cities · 2.00″Indiana6 cities · 1.50″Wisconsin4 cities · 1.50″

Hardest hit on May 7, 2024

Showing the 24 largest of 42 cities hit. The rest are under their state above.

What people on the ground measured in the US on May 7, 2024

15 reports filed with the National Weather Service — 2 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.

4.00″ softball size Broadcast Media
Leonidas, MI6:08 PM EDTSt. Joseph County
Photo on X/Twitter shows a 4 inch diameter hailstone!.
4.00″ softball size Trained Spotter
Union City, MI6:11 PM EDTBranch County
Picture shared on twitter of hail stone measuring upwards of 4 inches.
3.50″ baseball size Public
Michigan City, IN4:15 PM EDTLa Porte County
3.50″ baseball size Public
Michigan City, IN4:22 PM EDTLa Porte County
Corrects previous hail report from Michigan City.
3.50″ baseball size Public
Ashley, IN7:22 PM EDTDe Kalb County
3.50″ baseball size Public
Kendallville, IN7:25 PM EDTNoble County
Delayed report. Report from mPING: Baseball (3.50 in.).
3.00″ baseball size Public
Michigan City, IN4:20 PM EDTLa Porte County
Corrects previous hail report from Michigan City. Hail damage to vehicles in downtown Michigan City. Public report of 2 to 3.0 inch hailstones.
3.00″ baseball size Public
Michigan City, IN5:00 PM EDTLa Porte County
Hail damage to vehicles in downtown Michigan City. Public report of 2 to 2.5 inch hailstones.
3.00″ baseball size Public
Kendallville, IN6:50 PM EDTNoble County
3.00″ baseball size Public
Kendallville, IN6:55 PM EDTNoble County
Damage to cars, windows, and siding on homes in Kendallville due to hailstones up to 3 inches in diameter.
3.00″ baseball size Public
Kendallville, IN6:57 PM EDTNoble County
Corrects previous hail report from Kendallville.
3.00″ baseball size Public
Corunna, IN7:05 PM EDTDe Kalb County
Hail damage reported in Corunna to car, siding, and roofs. Hailstones up to 3 inches in diameter fell. Time estimated by radar.
3.00″ baseball size Public
Kendallville, IN7:05 PM EDTNoble County
Several 3 inch hailstones per Facebook reports.
3.00″ baseball size Emergency Mngr
Hudson, IN7:09 PM EDTSteuben County
Time estimated by radar.
3.00″ baseball size Public
Ashley, IN7:18 PM EDTDe Kalb County
Facebook photo of several 3 inch hailstones.

Showing the 15 largest of 208 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 hail days

August 19, 202620 cities · 2.00″August 18, 20266 cities · 1.50″August 17, 20266 cities · 1.00″August 16, 202610 cities · 1.50″August 15, 20268 cities · 1.50″August 14, 202611 cities · 2.00″August 13, 202616 cities · 2.00″August 12, 202610 cities · 1.50″August 11, 202633 cities · 2.00″August 10, 202623 cities · 1.50″August 9, 202649 cities · 1.50″August 8, 20265 cities · 1.50″

Every state with hail on record →

FAQ

US hail on May 7, 2024

NOAA radar put hail of an inch or more over 42 cities across 3 states on May 7, 2024. The largest stones — 2.00 inches, hen egg size — were over Joliet, IL. Every state hit is listed on this page, and every city under it.

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