How big was the hail on August 24, 2023?

The maximum estimated stone size anywhere in the country that day was 1.50 inches, over Rapid City, SD. 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 · August 24, 2023

Hail map — August 24, 2023

Name: US hail map — August 24, 2023
Creator: HailMate

NOAA radar detected hail of an inch or more over 18 cities across 4 states on August 24, 2023. The largest stones — 1.50″, half dollar size — fell over Rapid City, SD.

Hail swath map for Rapid City, SD on August 24, 2023 showing 1.50 inch hail. — Largest rendered swath of the day: Rapid City, SD — 1.50″ hail. Each city below has its own map for this storm.

States hit: 4
Cities hit: 18
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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Three years of hail swaths, filterable by stone size
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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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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 August 24, 2023

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

Wisconsin10 cities · 1.50″South Dakota1 city · 1.50″North Carolina1 city · 1.50″Michigan6 cities · 1.00″

Hardest hit on August 24, 2023

What people on the ground measured in the US on August 24, 2023

15 reports filed with the National Weather Service — 4 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.

1.50″ half dollar size Storm Chaser
13 S Merriman, NE6:31 PM CDTCherry County
motorist reported a cracked windshield also.
1.25″ half dollar size Public
2 SSW Oak Creek, WI5:15 PM CDTMilwaukee County
Twitter report of half dollar sized hail with attached photo.
1.00″ quarter size Trained Spotter
1 N Bottineau, ND3:48 PM CDTBottineau County
1.00″ quarter size NWS Employee
1 NNW Piedmont, SD4:49 PM CDTMeade County
1.00″ quarter size Public
Summerset, SD5:02 PM CDTMeade County
mPING report
1.00″ quarter size Public
2 SE Franklin, WI5:13 PM CDTMilwaukee County
Report from mPING: Quarter (1.00 in.).
1.00″ quarter size Public
Caledonia, WI5:25 PM CDTRacine County
Size est by picture. Time est by radar.
1.00″ quarter size Emergency Mngr
Salisbury, NC7:05 PM EDTRowan County
Observed at Salisbury HS.
1.00″ quarter size Public
15 SW Merriman, NE6:15 PM CDTCherry County
1.00″ quarter size Public
1 WNW Fort Atkinson, WI6:25 PM CDTJefferson County
Report from mPING: Quarter (1.00 in.).
1.00″ quarter size Public
3 E Fort Atkinson, WI6:32 PM CDTJefferson County
Report from mPING: Quarter (1.00 in.).
1.00″ quarter size Public
Grant, MI7:45 PM EDTNewaygo County
Relayed by WZZM.
0.75″ penny size Public
3 NE New Berlin, WI4:17 PM CDTWaukesha County
Report from mPING: Dime (0.75 in.).
0.75″ penny size Public
2 SE Franklin, WI5:10 PM CDTMilwaukee County
Report from mPING: Dime (0.75 in.).
0.75″ penny size Trained Spotter
4 WSW Box Elder, SD6:25 PM CDTPennington County
Strong wind gusts to over 50 mph tipped over a trailer.

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 August 24, 2023

NOAA radar put hail of an inch or more over 18 cities across 4 states on August 24, 2023. The largest stones — 1.50 inches, half dollar size — were over Rapid City, SD. Every state hit is listed on this page, and every city under it.

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