How big was the hail on July 23, 2024?

The maximum estimated stone size anywhere in the country that day was 1.50 inches, over Ames, IA. 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 · July 23, 2024

Hail map — July 23, 2024

Name: US hail map — July 23, 2024
Creator: HailMate

NOAA radar detected hail of an inch or more over 1 city across 1 state on July 23, 2024. The largest stones — 1.50″, half dollar size — fell over Ames, IA.

Hail swath map for Ames, IA on July 23, 2024 showing 1.50 inch hail. — Largest rendered swath of the day: Ames, IA — 1.50″ hail. Each city below has its own map for this storm.

States hit: 1
Cities hit: 1
Largest stone: 1.50″; half dollar size
Impact rating: 5/10; 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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Homeowners

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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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States hit on July 23, 2024

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

Iowa1 city · 1.50″

Hardest hit on July 23, 2024

Ames, IA1.50″ · half dollar

What people on the ground measured in the US on July 23, 2024

15 reports filed with the National Weather Service — 3 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.

1.00″ quarter size Public
Detroit Lakes, MN2:30 AM CDTBecker County
Hail stones 3/4 to 1 inch.
1.00″ quarter size Public
Vergas, MN2:50 AM CDTOtter Tail County
Hailstones 3/4 to a few 1 inch size.
1.00″ quarter size Public
3 SSW Detroit Lakes, MN3:31 AM CDTBecker County
1 inch hail southside of Big Detroit Lake.
1.00″ quarter size Public
3 W Phelps, MN3:40 AM CDTOtter Tail County
West Lost Lake.
1.00″ quarter size Public
7 W Tintah, MN4:40 AM CDTTraverse County
2.4 inches of rainfall. High winds caused leaves and branches down in the yard.
1.00″ quarter size Trained Spotter
6 E Wheaton, MN5:29 AM CDTTraverse County
Estimated 50-60 mph winds.
1.00″ quarter size Public
3 SSE Barry, MN6:06 AM CDTBig Stone County
Mostly dime to nickel size hail with a few quarter mixed in.
1.00″ quarter size Trained Spotter
Chilson, MI7:58 PM EDTLivingston County
Trained Spotter reported 1 inch hail near Brighton Rd and Chilson Rd.
0.88″ penny size Public
Dunvilla, MN3:10 AM CDTOtter Tail County
Penny to Nickel hail south side of Pelican Lake.
0.88″ penny size Public
West Bedford, OH3:56 PM EDTCoshocton County
Estimated on the corner of Route 541 and Route 51.
0.75″ penny size Public
Pelican Rapids, MN3:15 AM CDTOtter Tail County
0.75″ penny size Public
Dent, MN3:25 AM CDTOtter Tail County
penny size hail.
0.75″ penny size Public
3 SW Sonoraville, GA3:47 PM EDTGordon County
Report from mPING: Dime (0.75 in.).
0.70″ penny size Trained Spotter
4 ESE Arnolds Park, IA7:05 PM CDTDickinson County
Mostly pea sized, but some hail as big as dimes, along with heavy rainfall.
0.70″ penny size CO-OP Observer
3.0 SW Midway Airport, IL7:52 PM CDTCook County
Dime size hail from 7:52 pm to 7:55 pm.

Showing the 15 largest of 18 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 July 23, 2024

NOAA radar put hail of an inch or more over 1 city across 1 state on July 23, 2024. The largest stones — 1.50 inches, half dollar size — were over Ames, IA. Every state hit is listed on this page, and every city under it.

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