How big was the hail on September 9, 2023?

The maximum estimated stone size anywhere in the country that day was 1.50 inches, over Edison, NJ. 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 9, 2023

Hail map — September 9, 2023

Name: US hail map — September 9, 2023
Creator: HailMate

NOAA radar detected hail of an inch or more over 35 cities across 4 states on September 9, 2023. The largest stones — 1.50″, half dollar size — fell over Edison, NJ.

Hail swath map for Edison, NJ on September 9, 2023 showing 1.50 inch hail. — Largest rendered swath of the day: Edison, NJ — 1.50″ hail. Each city below has its own map for this storm.

States hit: 4
Cities hit: 35
Largest stone: 1.50″; half dollar size
Impact rating: 5/10; 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 9, 2023

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

New Jersey26 cities · 1.50″Connecticut6 cities · 1.00″Pennsylvania1 city · 1.00″Texas2 cities · 1.00″

Hardest hit on September 9, 2023

Showing the 24 largest of 35 cities hit. The rest are under their state above.

What people on the ground measured in the US on September 9, 2023

15 reports filed with the National Weather Service — 7 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.

2.75″ baseball size Trained Spotter
5 ESE Fort Laramie, WY9:45 PM MDTGoshen County
Emergency manager reported 2.8 inch hail relayed from Dan Fitts.
2.50″ hen egg size Emergency Mngr
17 NNW Boise City, OK5:54 PM CDTCimarron County
Report passed along by emergency manager with photos of hail.
2.00″ hen egg size Storm Chaser
10 ENE Arnold, NE3:15 PM CDTCuster County
2.00″ hen egg size Public
1 S Arnold, NE3:57 PM CDTCuster County
reports of vehicle damage in parking lot of business. time estimated from radar.
2.00″ hen egg size Storm Chaser
Wheeler, KS6:29 PM CDTCheyenne County
2 inch diameter hail reported at location via social media.
2.00″ hen egg size Trained Spotter
1 N Fort Laramie, WY9:19 PM MDTGoshen County
Spotter reported 2 inch hail ongoing. Started at 911PM.
1.75″ golf ball size Public
New Brunswick, NJ3:15 PM EDTMiddlesex County
Hail up to the size of golf balls in New Brunswick. Time estimated via radar.
1.75″ golf ball size Trained Spotter
6 SE Callaway, NE4:00 PM CDTCuster County
1.75″ golf ball size Public
3 S Wheeler, KS6:42 PM CDTCheyenne County
Estimated golf ball sized hail reported at location via social media.
1.75″ golf ball size Fire Dept/Rescue
2 N Hayes Center, NE7:02 PM CDTHayes County
1.75″ golf ball size Trained Spotter
4 N Fort Laramie, WY8:58 PM MDTGoshen County
1.75″ golf ball size Public
Douglas, WY9:00 PM MDTConverse County
Golfball to baseball sized hail.
1.75″ golf ball size Public
10 SE Texline, TX10:16 PM CDTDallam County
Photo submitted via social media. Time estimated by radar.
1.75″ golf ball size Trained Spotter
3 ESE Fort Laramie, WY9:26 PM MDTGoshen County
Golf ball hail at mile marker 34 on Highway 26 between Fort Laramie and Lingle.
1.75″ golf ball size Emergency Mngr
2 NW Veteran, WY11:46 PM MDTGoshen County
Roads covered in hail accumulation. Largest hailstone was golf ball sized.

Showing the 15 largest of 70 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 9, 2023

NOAA radar put hail of an inch or more over 35 cities across 4 states on September 9, 2023. The largest stones — 1.50 inches, half dollar size — were over Edison, NJ. Every state hit is listed on this page, and every city under it.

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