How big was the hail on July 27, 2026?

The maximum estimated stone size anywhere in Illinois that day was 2.00 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 · July 27, 2026

Illinois hail map — July 27, 2026

Name: Illinois hail map — July 27, 2026
Creator: HailMate

NOAA radar detected hail of an inch or more over 127 Illinois cities on July 27, 2026. The largest stones — 2.00″, hen egg size — fell over Joliet.

Hail swath map for Joliet, IL on July 27, 2026 showing 2.00 inch hail. — Swath over Joliet on July 27, 2026 — 2.00″ hail. Each city below has its own map for this storm.

Cities hit: 127; in Illinois
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.

All of Illinois 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 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 July 27, 2026

What people on the ground measured in Illinois on July 27, 2026

12 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.

3.00″ baseball size Trained Spotter
2 WSW Shorewood, IL3:41 PM CDTWill County
Photo shows hail stone at least 3 inches in diameter that fell near Four Seasons Park in Shorewood. Hail stone was collected and frozen 2 minutes after it fell. Multiple other hail stones golf ball size. Time estimated by radar.
2.75″ baseball size Public
Woodland, IL5:40 PM CDTIroquois County
Photo relayed via social media shows hailstone slightly larger than a baseball. Time estimated by radar.
2.50″ hen egg size Trained Spotter
1 WNW Westmont, IL12:18 PM CDTDuPage County
2.50″ hen egg size Public
3 W Woodland, IL5:33 PM CDTIroquois County
Photo relayed by broadcast media shows hail up to the size of a tennis ball. Time estimated by radar.
2.50″ hen egg size Broadcast Media
1 SSE Milford, IL6:00 PM CDTIroquois County
Photo relayed by broadcast media shows hailstones ranging in size from golf ball to tennis ball size. Time estimated by radar.
2.25″ hen egg size Public
2 N Shorewood, IL3:35 PM CDTWill County
Relayed via mping. Time estimated by radar.
2.00″ hen egg size Public
1 SSE Watseka, IL5:33 AM CDTIroquois County
Photo shows hailstone larger than 2 inches in diameter.
2.00″ hen egg size Public
Clarendon Hills, IL11:56 AM CDTDuPage County
Trained spotter reported 2 inch diameter hail in Clarendon Hills. Time estimated by radar.
2.00″ hen egg size Public
1 NW Clarendon Hills, IL12:04 PM CDTDuPage County
Report from mPING: Hen Egg (2.00 in.).
2.00″ hen egg size Public
Downers Grove, IL12:05 PM CDTDuPage County
Measured hailstone of 2 inches in diameter. Time estimated by radar.
2.00″ hen egg size Public
Oak Brook, IL12:08 PM CDTDuPage County
Photo shared on social media showing a hailstone roughly two inches in diameter.
2.00″ hen egg size Public
1 SE Minooka, IL3:46 PM CDTWill County
Public report of hen egg size hail near Minooka. Time estimated by radar. Relayed via mping.

Showing the 12 largest of 65 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 July 27, 2026

Wisconsin9 cities · 2.00″Indiana1 city · 1.50″Iowa3 cities · 1.00″New York1 city · 1.00″Pennsylvania1 city · 1.00″New Jersey1 city · 1.00″Michigan1 city · 1.00″Ohio1 city · 1.00″

The full US hail map for July 27, 2026 →

Other Illinois hail days

August 13, 20263 cities · 1.00″August 11, 20263 cities · 1.00″August 9, 202640 cities · 1.50″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″June 9, 20261 city · 1.00″

Every hail day across Illinois →

FAQ

Illinois hail on July 27, 2026

NOAA radar put hail of an inch or more over 127 Illinois cities that day. The largest stones — 2.00 inches, hen egg size — were over Joliet. Every city hit is listed above with its own stone size.

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