How big was the hail on September 21, 2025?

The maximum estimated stone size anywhere in the country that day was 2.00 inches, over Denton, TX. 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 · September 21, 2025

Hail map — September 21, 2025

Name: US hail map — September 21, 2025
Creator: HailMate

NOAA radar detected hail of an inch or more over 28 cities across 6 states on September 21, 2025. The largest stones — 2.00″, hen egg size — fell over Denton, TX.

Hail swath map for Denton, TX on September 21, 2025 showing 2.00 inch hail. — Largest rendered swath of the day: Denton, TX — 2.00″ hail. Each city below has its own map for this storm.

States hit: 6
Cities hit: 28
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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HailMate's canvassing map: hail swaths colour-banded by stone size, from yellow through red to purple, laid over a satellite view of a Texas territory, with hail swath and territory controls.

Your whole state at street level, with this storm already on it
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 September 21, 2025

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

Texas4 cities · 2.00″Minnesota16 cities · 2.00″Louisiana2 cities · 1.00″Illinois3 cities · 1.00″Oklahoma2 cities · 1.00″Kansas1 city · 1.00″

Hardest hit on September 21, 2025

Showing the 24 largest of 28 cities hit. The rest are under their state above.

What people on the ground measured in the US on September 21, 2025

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.

2.50″ hen egg size Trained Spotter
Luella, TX5:30 PM CDTGrayson County
Photo received of measured 2.5 inch hail. Time estimated.
2.50″ hen egg size Public
3 SE Howe, TX5:51 PM CDTGrayson County
Large hail 2.25-2.5 inches in size fell for 8-10 minutes about 3 miles southeast of Howe. Windows were broken and roof damage was observed. The weather station at this location also measured 62 mph winds with large tree branches broken.
2.00″ hen egg size Public
4 S Valley View, TX5:30 PM CDTCooke County
Report from mPING.
2.00″ hen egg size Trained Spotter
6 NNW New Richland, MN5:54 PM CDTWaseca County
2.00″ hen egg size Public
2 NE Melissa, TX6:25 PM CDTCollin County
Report from mPING: Hen Egg (2.00 in.).
2.00″ hen egg size Public
1 SSW Woodbury, MN8:17 PM CDTWashington County
Sent via X.
2.00″ hen egg size Public
1 N Deephaven, MN9:05 PM CDTHennepin County
Report and picture sent via X.
2.00″ hen egg size Trained Spotter
4 SSE Struble, IA9:15 PM CDTPlymouth County
Report relayed by broadcast media.
2.00″ hen egg size Public
1 SW Minnetonka, MN9:20 PM CDTHennepin County
Report from mPING: Hen Egg (2.00 in.).
1.75″ golf ball size Trained Spotter
2 SE Howe, TX5:45 PM CDTGrayson County
Photo received of measured 1.75 inch hail. Time estimated.
1.75″ golf ball size Broadcast Media
Van Alstyne, TX6:16 PM CDTGrayson County
1.75″ golf ball size Public
Anna, TX6:16 PM CDTCollin County
Report from mPING: Golf Ball (1.75 in.).
1.75″ golf ball size Trained Spotter
3 WNW Blooming Prairie, MN7:10 PM CDTSteele County
Delayed report, time estimated from radar. Golf ball size hail on Hwy 30 west of Blooming Prairie.
1.75″ golf ball size Public
8 NNE Hawarden, IA7:35 PM CDTSioux County
Estimated ping pong ball to golf ball size hail. Time estimated from radar.
1.75″ golf ball size Trained Spotter
1 SSE South St. Paul, MN8:07 PM CDTDakota County

Showing the 15 largest of 75 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 September 21, 2025

NOAA radar put hail of an inch or more over 28 cities across 6 states on September 21, 2025. The largest stones — 2.00 inches, hen egg size — were over Denton, TX. Every state hit is listed on this page, and every city under it.

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