How big was the hail on May 16, 2025?

The maximum estimated stone size anywhere in the country that day was 2.00 inches, over O'Fallon, MO. 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 radar, ingested directly from the public NOAA archive. The estimated stone size 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 16, 2025

Hail map — May 16, 2025

Name: US hail map — May 16, 2025
Creator: HailMate

NOAA radar detected hail of an inch or more over 59 cities across 9 states on May 16, 2025. The largest stones — 2.00″, hen egg size — fell over O'Fallon, MO.

Hail swath map for O'Fallon, MO on May 16, 2025 showing 2.00 inch hail. — Largest rendered swath of the day: O'Fallon, MO — 2.00″ hail. Each city below has its own map for this storm.

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The May 16, 2025 swath — and every other storm since 2023 across your state
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States hit: 9
Cities hit: 59
Largest stone: 2.00″; hen egg size
Impact rating: 7/10; from stone size

Sizes come from NOAA radar, which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.

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'll have the date and the stone size in writing — which is the first thing an adjuster asks for.

States hit on May 16, 2025

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

Texas13 cities · 2.00″Kentucky5 cities · 2.00″Missouri18 cities · 2.00″Illinois5 cities · 2.00″Maryland10 cities · 1.50″Indiana3 cities · 1.00″Ohio3 cities · 1.00″Arkansas1 city · 1.00″New Jersey1 city · 1.00″

Hardest hit on May 16, 2025

Showing the 24 largest of 59 cities hit. The rest are under their state above.

What people on the ground measured in the US on May 16, 2025

15 reports filed with the National Weather Service — 4 from trained observers or officials. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.

4.50″ softball size Public
2 NNE La Center, KY5:45 PM EDTBallard County
Late LSR. At least two public reports/photos of approximately CD/DVD sized hail in Ballard County on the afternoon of May 16. Working on establishing a more precise measurement of a couple of potentially extreme hailstones.
4.00″ softball size Public
Saint Robert, MO1:09 PM CDTPulaski County
via social media post and picture.
4.00″ softball size Public
Barlow, KY5:58 PM EDTBallard County
reports of windows busted out from hail.
4.00″ softball size Amateur Radio
2 ENE Sullivan, IN6:34 PM EDTSullivan County
3.25″ baseball size Public
1 SW Waynesville, MO1:05 PM CDTPulaski County
Report from mPING, Baseball 3.25 in.
3.00″ baseball size Public
Saint Robert, MO1:09 PM CDTPulaski County
Corrects previous hail report from Saint Robert. via social media post and picture. Corrected size.
3.00″ baseball size Emergency Mngr
2 SW Waynesville, MO1:10 PM CDTPulaski County
picture of 3 inch hail.
3.00″ baseball size Emergency Mngr
Robinson, IL5:00 PM CDTCrawford County
3.00″ baseball size NWS Employee
4 NW Leander, TX8:53 PM CDTWilliamson County
Hail photographed alongside ruler.
3.00″ baseball size Amateur Radio
Greenfield, OH10:18 PM EDTHighland County
Photo of hail, size and time estimated in report.
2.76″ baseball size Broadcast Media
3 SW Morgan, TX8:26 PM CDTBosque County
Photo of measured 2.76 inch hail.
2.75″ baseball size Public
Lost Creek, KY1:03 PM EDTBreathitt County
Photos of two hailstones with diameter greater than 2 inches. Largest stone appears to be 2.75 inches or larger.
2.75″ baseball size Amateur Radio
Ava, MO12:42 PM CDTDouglas County
2.75″ baseball size Public
3 S Zalma, MO3:56 PM CDTBollinger County
2.75″ baseball size Emergency Mngr
1 S Barlow, KY5:44 PM EDTBallard County

Showing the 15 largest of 541 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

September 30, 20261 city · 2.00″September 28, 20261 city · 1.00″September 27, 20264 cities · 1.00″September 26, 20261 city · 1.00″September 25, 20263 cities · 1.00″September 23, 20262 cities · 1.00″September 22, 202617 cities · 1.00″September 21, 202665 cities · 2.00″September 20, 20268 cities · 1.50″September 19, 202637 cities · 1.50″September 18, 202623 cities · 2.00″September 17, 202619 cities · 1.50″

Every state with hail on record →

FAQ

US hail on May 16, 2025

NOAA radar put hail of an inch or more over 59 cities across 9 states on May 16, 2025. The largest stones — 2.00 inches, hen egg size — were over O'Fallon, MO. Every state hit is listed on this page, and every city under it.

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