How big was the hail on August 7, 2025?

The maximum estimated stone size anywhere in the country that day was 1.00 inches, over Billings, MT. 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 · August 7, 2025

Hail map — August 7, 2025

Name: US hail map — August 7, 2025
Creator: HailMate

NOAA radar detected hail of an inch or more over 3 cities across 3 states on August 7, 2025. The largest stones — 1.00″, quarter size — fell over Billings, MT.

Hail swath map for Billings, MT on August 7, 2025 showing 1.00 inch hail. — Largest rendered swath of the day: Billings, MT — 1.00″ hail. Each city below has its own map for this storm.

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The August 7, 2025 swath — and every other storm since 2023 across your state
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States hit: 3
Cities hit: 3
Largest stone: 1.00″; quarter size
Impact rating: 3/10; 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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States hit on August 7, 2025

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

Montana1 city · 1.00″Florida1 city · 1.00″North Dakota1 city · 1.00″

Hardest hit on August 7, 2025

Billings, MT1.00″ · quarter North Port, FL1.00″ · quarter Minot, ND1.00″ · quarter

What people on the ground measured in the US on August 7, 2025

15 reports filed with the National Weather Service — 5 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.

2.00″ hen egg size Public
Forest Park, MT8:20 AM MDTDawson County
Hail lasted about 20 minutes. Largest stones were about 2 inches.
2.00″ hen egg size Public
Lachine, MI7:00 PM EDTAlpena County
Corrects previous hail report from Lachine. Report on fakebook displayed individual holding large hail stone. They stated that it was 2 inches in diameter.
2.00″ hen egg size Public
Lachine, MI7:41 PM EDTAlpena County
Report on fakebook displayed individual holding large hail stone. They stated that it was 2 inches in diameter.
2.00″ hen egg size Public
6 E Alpena, MI8:31 PM EDTAlpena County
Face port report with a 2 inch hail stone near Misery Bay east of Alpena.
2.00″ hen egg size Public
Bird City, KS7:45 PM CDTCheyenne County
Delayed report of estimated 2 inch hail in Bird City with photo. Multiple stones around 1-1.5 inches. Time estimated.
1.75″ golf ball size CO-OP Observer
6 SSW Molt, MT5:20 PM MDTStillwater County
Large hail lasted 10 min.
1.75″ golf ball size Public
8 ESE Molt, MT5:33 PM MDTYellowstone County
Corrects previous hail report from 8 ESE Molt. Facebook comment.
1.75″ golf ball size Public
8 ESE Molt, MT6:20 PM MDTYellowstone County
Facebook comment.
1.75″ golf ball size Emergency Mngr
Powers Lake, ND8:33 PM CDTBurke County
Emergency Manager sent video showing rain and hail (up to the size of golf balls).
1.50″ half dollar size Trained Spotter
7 SE Molt, MT5:22 PM MDTYellowstone County
1.50″ half dollar size Trained Spotter
8 NNW Laurel, MT5:28 PM MDTYellowstone County
Corrects previous hail report from 8 NNW Laurel.
1.50″ half dollar size Public
1 ESE Billings, MT5:30 PM MDTYellowstone County
1.50″ half dollar size Trained Spotter
8 NNW Laurel, MT5:33 PM MDTYellowstone County
1.25″ half dollar size Public
Bird City, KS6:41 PM CDTCheyenne County
Public report of hail up to 1-1.25 inches in Bird City.
1.25″ half dollar size NWS Employee
2 ENE Billings, MT5:49 PM MDTYellowstone County
Corrects previous hail report from 2 ENE Billings.

Showing the 15 largest of 58 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 12, 202618 cities · 1.50″September 11, 202627 cities · 2.00″September 10, 20266 cities · 2.00″September 9, 20262 cities · 1.00″September 8, 202611 cities · 2.00″September 7, 202626 cities · 2.00″September 5, 202655 cities · 2.00″September 4, 202645 cities · 2.00″September 3, 2026115 cities · 2.00″September 2, 202622 cities · 2.00″September 1, 202645 cities · 2.00″August 31, 20264 cities · 2.00″

Every state with hail on record →

FAQ

US hail on August 7, 2025

NOAA radar put hail of an inch or more over 3 cities across 3 states on August 7, 2025. The largest stones — 1.00 inches, quarter size — were over Billings, MT. Every state hit is listed on this page, and every city under it.

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