How big was the hail on September 26, 2023?

The maximum estimated stone size anywhere in Illinois that day was 1.00 inches. 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.

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 the whole of Illinois on a real interactive map with this swath and three years of others already on it. $79/mo, and the canvassing tools come with it.

Illinois · September 26, 2023

Illinois hail map — September 26, 2023

Name: Illinois hail map — September 26, 2023
Creator: HailMate

NOAA radar detected hail of an inch or more over 3 Illinois cities on September 26, 2023. The largest stones — 1.00″, quarter size — fell over Moline.

Hail swath map for Moline, IL on September 26, 2023 showing 1.00 inch hail. — Swath over Moline on September 26, 2023 — 1.00″ hail. Each city below has its own map for this storm.

Cities hit: 3; in Illinois
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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All of Illinois at street level, with this storm already on it
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Homeowners

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This page covers Illinois 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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Illinois cities hit on September 26, 2023

Moline, IL1.00″ · quarter Rock Island, IL1.00″ · quarter East Moline, IL1.00″ · quarter

What people on the ground measured in Illinois on September 26, 2023

12 reports filed with the National Weather Service — 4 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.

1.00″ quarter size Public
Moline Quad-City Airpor, IL5:14 PM CDTRock Island County
Delayed report. At the intersection of U.S. 6 and I74.
1.00″ quarter size Public
3 NW Dillon, IL11:00 PM CDTTazewell County
Nickel to quarter sized hail.
0.88″ penny size Trained Spotter
2 ESE Coal Valley, IL5:17 PM CDTHenry County
0.88″ penny size Cocorahs
Granite City, IL6:28 PM CDTMadison County
0.75″ penny size Trained Spotter
Mitchell, IL6:27 PM CDTMadison County
0.75″ penny size Public
Green Valley, IL10:45 PM CDTTazewell County
Penny sized hail, report relayed by broadcast media.
0.70″ penny size Public
Coal Valley, IL5:12 PM CDTRock Island County
Some hail to dime size. A LOT of pea sized hail.
0.50″ penny size Trained Spotter
4 SE Buckhorn, IL4:45 PM CDTBrown County
0.50″ penny size Public
1 SSW Coal Valley, IL5:10 PM CDTRock Island County
Report from mPING: Half-inch (0.50 in.).
0.50″ penny size Trained Spotter
2 NNW Warner, IL5:22 PM CDTHenry County
Occurring right now.
0.25″ penny size Mesonet
2 W Buckhorn, IL4:35 PM CDTBrown County
mPING report.
0.25″ penny size Broadcast Media
1 NNE Fruitland, IL5:20 PM CDTRock Island County
At WQAD studio.

Showing the 12 largest of 13 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 states hit on September 26, 2023

Missouri6 cities · 2.00″Texas3 cities · 1.00″Iowa1 city · 1.00″

The full US hail map for September 26, 2023 →

Other Illinois hail days

August 13, 20263 cities · 1.00″August 11, 20263 cities · 1.00″August 9, 202640 cities · 1.50″July 27, 2026127 cities · 2.00″July 10, 20262 cities · 1.00″July 4, 20261 city · 1.50″July 3, 202618 cities · 1.00″July 2, 202614 cities · 1.00″June 24, 202614 cities · 1.50″June 17, 20264 cities · 2.00″June 11, 20261 city · 1.00″June 10, 202614 cities · 1.00″

Every hail day across Illinois →

FAQ

Illinois hail on September 26, 2023

NOAA radar put hail of an inch or more over 3 Illinois cities that day. The largest stones — 1.00 inches, quarter size — were over Moline. Every city hit is listed above with its own stone size.

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