How big was the hail on August 16, 2025?

The maximum estimated stone size anywhere in the country that day was 2.00 inches, over Janesville, WI. 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 16, 2025

Hail map — August 16, 2025

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

NOAA radar detected hail of an inch or more over 51 cities across 8 states on August 16, 2025. The largest stones — 2.00″, hen egg size — fell over Janesville, WI.

Hail swath map for Janesville, WI on August 16, 2025 showing 2.00 inch hail. — Largest rendered swath of the day: Janesville, WI — 2.00″ hail. Each city below has its own map for this storm.

States hit: 8
Cities hit: 51
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 16, 2025

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

Wisconsin4 cities · 2.00″Illinois39 cities · 2.00″South Dakota1 city · 1.00″Michigan1 city · 1.00″Iowa1 city · 1.00″Missouri2 cities · 1.00″Florida1 city · 1.00″Indiana2 cities · 1.00″

Hardest hit on August 16, 2025

Showing the 24 largest of 51 cities hit. The rest are under their state above.

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

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.

3.00″ baseball size Public
1 N Winslow, IL7:33 PM CDTStephenson County
Report from mPING. This report was corroborated with photographic evidence of a jagged hailstone around 3 to 3.5 inches in diameter.
2.00″ hen egg size Public
2 NW Winslow, WI7:24 PM CDTGreen County
Report from mPING: Hen Egg (2.00 in.).
1.75″ golf ball size Emergency Mngr
Wessington Springs, SD2:05 AM CDTJerauld County
A few hail stones up to golf ball size. Time estimated from radar.
1.75″ golf ball size Emergency Mngr
1 W New Lisbon, WI2:38 PM CDTJuneau County
Corrects previous hail report from 1 W New Lisbon for time based on radar. Golf ball size hail reported west of New Lisbon.
1.75″ golf ball size Emergency Mngr
1 W New Lisbon, WI2:58 PM CDTJuneau County
Golf ball size hail reported west of New Lisbon.
1.50″ half dollar size Storm Chaser
2 W Janesville, WI2:20 PM CDTRock County
Social media report from local storm chaser of the size of ping pong balls on the west side of Janesville. Time estimated from radar.
1.50″ half dollar size Public
1 N Clinton, WI2:40 PM CDTRock County
Image of ping-pong ball sized hail from a social media report, with a quarter for scale.
1.50″ half dollar size Public
1 SW Port Barrington, IL4:04 PM CDTMcHenry County
Relayed via mping.
1.50″ half dollar size Public
3 SW Naperville, IL5:14 PM CDTDuPage County
Relayed via mping.
1.25″ half dollar size Public
Cary, IL4:05 PM CDTMcHenry County
Relayed via mping.
1.25″ half dollar size Cocorahs
1 E Palatine, IL4:25 PM CDTCook County
1.25″ half dollar size Public
Des Plaines, IL4:44 PM CDTCook County
Report from mPING: Half Dollar (1.25 in.).
1.00″ quarter size Public
Calmar, IA1:13 AM CDTWinneshiek County
1.00″ quarter size Public
2 SW Current Lake, MN4:06 AM CDTMurray County
Report from mPING: Quarter (1.00 in.).
1.00″ quarter size Public
4 NE Cross Plains, WI1:12 PM CDTDane County
Report from mPING: Quarter (1.00 in.).

Showing the 15 largest of 43 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 16, 2025

NOAA radar put hail of an inch or more over 51 cities across 8 states on August 16, 2025. The largest stones — 2.00 inches, hen egg size — were over Janesville, WI. Every state hit is listed on this page, and every city under it.

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