How big was the hail on September 7, 2025?

The maximum estimated stone size anywhere in the country that day was 1.00 inches, over Salt Lake City, UT. 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 7, 2025

Hail map — September 7, 2025

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

NOAA radar detected hail of an inch or more over 3 cities across 2 states on September 7, 2025. The largest stones — 1.00″, quarter size — fell over Salt Lake City, UT.

Hail swath map for Salt Lake City, UT on September 7, 2025 showing 1.00 inch hail. — Largest rendered swath of the day: Salt Lake City, UT — 1.00″ hail. Each city below has its own map for this storm.

States hit: 2
Cities hit: 3
Largest stone: 1.00″; quarter size
Impact rating: 3/10; 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 7, 2025

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

Utah2 cities · 1.00″Idaho1 city · 1.00″

Hardest hit on September 7, 2025

Salt Lake City, UT1.00″ · quarter Bountiful, UT1.00″ · quarter Conda, ID1.00″ · quarter

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

15 reports filed with the National Weather Service — 2 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.

1.75″ golf ball size Public
3 WSW Soda Springs, ID3:00 PM MDTCaribou County
Severe crop damage, vehicle damage, and damage to homes/landscaping noted as well.
1.75″ golf ball size Public
2 W Soda Springs, ID3:01 PM MDTCaribou County
Vehicles dented. Time estimated based on radar.
1.50″ half dollar size Public
3 W Soda Springs, ID3:00 PM MDTCaribou County
1.50″ half dollar size Cocorahs
Soda Springs, ID3:05 PM MDTCaribou County
CoCoRaHS observer reports pea to ping pong ball size hail fell on and off for approximately 1 hour between 230 PM and 330 PM. Average hail size over that period was nickels. Significant damage to gardens and shredded leaves reported.
1.25″ half dollar size Public
1 E Soda Springs, ID3:10 PM MDTCaribou County
On Pioneer Dr. Photo submitted via social media. Time estimated based on radar.
1.25″ half dollar size Cocorahs
5 NW Roy, ID4:15 PM MDTPower County
Along Side Canyon Rd. Size estimated from photos. Hail covered the ground.
1.00″ quarter size Public
1 W Soda Springs, ID3:01 PM MDTCaribou County
Multiple reports. Photos via social media. Time estimated based on radar.
1.00″ quarter size Trained Spotter
1 SW Soda Springs, ID3:03 PM MDTCaribou County
0.88″ penny size Public
Mackay, ID2:25 PM MDTCuster County
0.88″ penny size Public
7 WNW Conda, ID2:50 PM MDTCaribou County
0.88″ penny size Trained Spotter
Ojo Feliz, NM4:43 PM MDTMora County
0.70″ penny size Public
Challis, ID2:35 PM MDTCuster County
0.70″ penny size Public
2 S Bountiful, UT2:55 PM MDTDavis County
0.50″ penny size Public
Inkom, ID2:15 PM MDTBannock County
0.50″ penny size Public
3 W Soda Springs, ID2:58 PM MDTCaribou County
Updated. Half inch hail accumulated about 2 inches deep on US-30 west of Soda Springs. Report and video submitted via social media.

Showing the 15 largest of 18 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 7, 2025

NOAA radar put hail of an inch or more over 3 cities across 2 states on September 7, 2025. The largest stones — 1.00 inches, quarter size — were over Salt Lake City, UT. Every state hit is listed on this page, and every city under it.

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