How big was the hail on August 23, 2024?

The maximum estimated stone size anywhere in the country that day was 1.50 inches, over Marana, AZ. 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 23, 2024

Hail map — August 23, 2024

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

NOAA radar detected hail of an inch or more over 5 cities across 3 states on August 23, 2024. The largest stones — 1.50″, half dollar size — fell over Marana, AZ.

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

States hit: 3
Cities hit: 5
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

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 August 23, 2024

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

Arizona2 cities · 1.50″New York2 cities · 1.00″Kansas1 city · 1.00″

Hardest hit on August 23, 2024

Marana, AZ1.50″ · half dollar West Albany, NY1.00″ · quarter Casas Adobes, AZ1.00″ · quarter Derby, KS1.00″ · quarter Latham, NY1.00″ · quarter

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

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.

2.50″ hen egg size Public
11 E Larslan, MT6:39 PM MDTDaniels County
Corrects previous hail report from 11 E Larslan updating the time of the report based on radar estimate. Up to tennis balls. Mostly golf balls. Car body and windshield damage.
2.50″ hen egg size Public
11 E Larslan, MT7:07 PM MDTDaniels County
Up to tennis balls. Mostly golf balls. Car body and windshield damage.
2.50″ hen egg size Public
6 NNW Larslan, MT7:07 PM MDTValley County
Accompanied by estimated 60 mph wind. Damage to pick-ups (dimples in hoods and cracked windshields). Flattened 2 foot high grass.
1.25″ half dollar size Public
Thompson Springs, UT4:43 PM MDTGrand County
1.00″ quarter size Public
1 NE Clyde, TX6:18 PM CDTCallahan County
Report from mPING: Quarter (1.00 in.).
1.00″ quarter size Trained Spotter
12 W Tucson, AZ4:19 PM MSTPima County
1.00″ quarter size Public
2 N Larslan, MT7:08 PM MDTValley County
Hail up to the size of quarters. Depth of accumularted hail up to 6 inches.
1.00″ quarter size Public
7 NNE Larslan, MT7:10 PM MDTValley County
1.00″ quarter size Trained Spotter
8 S Glentana, MT7:30 PM MDTValley County
0.88″ penny size CO-OP Observer
10 E Fry Cyn, UT3:35 PM MDTSan Juan County
0.88″ penny size Trained Spotter
11 W Huachuca City, AZ3:38 PM MSTSanta Cruz County
0.88″ penny size Storm Chaser
6 SSW Melbeta, NE5:57 PM CDTScotts Bluff County
0.88″ penny size NWS Employee
Saint Mary, MT5:43 PM MDTGlacier County
Off-duty NWS employee relays report of nickel sized hail on social media.
0.70″ penny size Public
1 WNW Lewisville, ID1:32 PM MDTJefferson County
Video via social media. Time estimated based on radar.
0.70″ penny size Public
1 W Thompson Springs, UT4:45 PM MDTGrand County

Showing the 15 largest of 22 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 23, 2024

NOAA radar put hail of an inch or more over 5 cities across 3 states on August 23, 2024. The largest stones — 1.50 inches, half dollar size — were over Marana, AZ. Every state hit is listed on this page, and every city under it.

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