How big was the hail on August 15, 2024?

The maximum estimated stone size anywhere in the country that day was 2.00 inches, over Stillwater, OK. 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 15, 2024

Hail map — August 15, 2024

Name: US hail map — August 15, 2024
Creator: HailMate

NOAA radar detected hail of an inch or more over 22 cities across 9 states on August 15, 2024. The largest stones — 2.00″, hen egg size — fell over Stillwater, OK.

Hail swath map for Stillwater, OK on August 15, 2024 showing 2.00 inch hail. — Largest rendered swath of the day: Stillwater, OK — 2.00″ hail. Each city below has its own map for this storm.

States hit: 9
Cities hit: 22
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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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 15, 2024

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

Oklahoma6 cities · 2.00″New Hampshire3 cities · 1.50″California1 city · 1.50″Illinois1 city · 1.50″New York2 cities · 1.50″Missouri1 city · 1.00″Louisiana1 city · 1.00″Massachusetts6 cities · 1.00″Iowa1 city · 1.00″

What people on the ground measured in the US on August 15, 2024

15 reports filed with the National Weather Service — 6 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.

3.25″ baseball size Public
2 NNW Decaturville, MO7:10 PM CDTCamden County
Picture with ruler of a hail stone which was 3.25 inches long and 1.5 inches wide.
2.00″ hen egg size Trained Spotter
3 W Drummond, OK5:56 PM CDTGarfield County
Spotters reporting just shy of tennis ball sized hail west of Drummond.
1.75″ golf ball size Trained Spotter
2 SW Chester, NH3:06 PM EDTRockingham County
Golf ball-sized hail fell for 8-9 minutes.
1.75″ golf ball size Broadcast Media
2 N Round Lake, NY4:53 PM EDTSaratoga County
Received a report from Media partner of estimated hail size of golf ball in the town of Malta. Time is based on radar. The period of the Hail event was 10 minutes.
1.75″ golf ball size Broadcast Media
4 NNE Hudson Falls, NY5:55 PM EDTWashington County
Delayed report received from broadcast media. Time estimated from radar.
1.75″ golf ball size Emergency Mngr
3 W Drummond, OK5:50 PM CDTGarfield County
Golfball sized hail covering the ground 3 miles west of Drummond. Relayed to EM from county spotters.
1.75″ golf ball size Public
Decaturville, MO7:02 PM CDTCamden County
1.50″ half dollar size Law Enforcement
3 E Hopkinton, NH2:25 PM EDTMerrimack County
1.50″ half dollar size Public
2 SSE Pawcatuck, CT4:41 PM EDTNew London County
Ping pong size hail reported.
1.50″ half dollar size Trained Spotter
Halls Corner, NY4:42 PM EDTSaratoga County
Near Raspbery Dr.
1.50″ half dollar size Public
2 SSW Westerly AP, RI4:44 PM EDTWashington County
Picture tweeted at WFO account showing what looked to be 1.5 inch hail in Misquamicut. Time estimated via radar.
1.50″ half dollar size Trained Spotter
1 SSW Westerly AP, RI4:45 PM EDTWashington County
Spotter reported 1.5 inch hail on Yarmouth Dr. in Westerly, RI. Time estimated via radar. Relayed via amateur radio.
1.50″ half dollar size Public
2 N Round Lake, NY4:50 PM EDTSaratoga County
Social Media report with video of ping pong ball sized hail falling in the town of Malta. The period of the Hail event was 10 minutes.
1.50″ half dollar size Trained Spotter
1 S Danville, IA9:35 PM CDTDes Moines County
Ping pong size hail.
1.25″ half dollar size Public
Epsom, NH2:00 PM EDTMerrimack County

Showing the 15 largest of 64 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 15, 2024

NOAA radar put hail of an inch or more over 22 cities across 9 states on August 15, 2024. The largest stones — 2.00 inches, hen egg size — were over Stillwater, OK. Every state hit is listed on this page, and every city under it.

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