How big was the hail on February 27, 2024?

The maximum estimated stone size anywhere in the country that day was 1.00 inches, over Bolingbrook, IL. 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 · February 27, 2024

Hail map — February 27, 2024

Name: US hail map — February 27, 2024
Creator: HailMate

NOAA radar detected hail of an inch or more over 11 cities across 2 states on February 27, 2024. The largest stones — 1.00″, quarter size — fell over Bolingbrook, IL.

Hail swath map for Bolingbrook, IL on February 27, 2024 showing 1.00 inch hail. — Largest rendered swath of the day: Bolingbrook, IL — 1.00″ hail. Each city below has its own map for this storm.

States hit: 2
Cities hit: 11
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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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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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 February 27, 2024

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

Illinois10 cities · 1.00″Michigan1 city · 1.00″

Hardest hit on February 27, 2024

Bolingbrook, IL1.00″ · quarter Battle Creek, MI1.00″ · quarter Moline, IL1.00″ · quarter Plainfield, IL1.00″ · quarter Romeoville, IL1.00″ · quarter Woodridge, IL1.00″ · quarter St. Charles, IL1.00″ · quarter Wasco, IL1.00″ · quarter Darien, IL1.00″ · quarter Geneva, IL1.00″ · quarter East Moline, IL1.00″ · quarter

What people on the ground measured in the US on February 27, 2024

15 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.

2.50″ hen egg size Trained Spotter
1 SW Darien, IL7:54 PM CSTDuPage County
Photo shared via social media showing 2.5 inch diameter hailstone on the south side of Downers Grove. Another report of 2 inch diameter hail was also received from the area. Time estimated from radar.
2.50″ hen egg size Broadcast Media
2 SE Brownlee Park, MI12:25 AM ESTCalhoun County
Measured hail diameter of 2.4 inches.
2.00″ hen egg size Public
Shabbona, IL6:37 PM CSTDe Kalb County
Photo shared via social media showing 2 inch diameter hail in Shabbona. Time estimated from radar.
2.00″ hen egg size Public
2 ESE Woodridge, IL8:00 PM CSTDuPage County
Photo shared via social media shows hail up to hen egg size between Downers Grove and Darien. Time estimated by radar.
2.00″ hen egg size Emergency Mngr
1 NNW Oak Forest, IL8:44 PM CSTCook County
Time estimated from radar.
1.75″ golf ball size Public
1 WSW Geneseo, IL5:38 PM CSTHenry County
time estimated from radar.
1.75″ golf ball size Public
Atkinson, IL6:05 PM CSTHenry County
Delayed report via social media with pictures.
1.75″ golf ball size Law Enforcement
3 WNW Sublette, IL6:06 PM CSTLee County
Relayed via HAM radio operator. At least golf ball sized hail.
1.75″ golf ball size Emergency Mngr
Sublette, IL6:16 PM CSTLee County
Photo of estimated golf ball size hail. Time estimated.
1.75″ golf ball size Public
Romeoville, IL7:57 PM CSTWill County
Photo shared via broadcast media showed golf ball sized hail in north Romeoville. Time estimated by radar.
1.75″ golf ball size Public
2 SW Darien, IL8:06 PM CSTDuPage County
Relayed via mPING. Time estimated by radar.
1.75″ golf ball size Public
Darien, IL8:09 PM CSTDuPage County
Relayed via mPING. Time estimated by radar.
1.75″ golf ball size Public
Hegeswisch - Chicago, IL8:54 PM CSTCook County
Photo shared via social media showing hail in the Hegewisch community area of Chicago with the largest hailstone appearing to be roughly the size of a golf ball. Time estimated from radar.
1.75″ golf ball size Trained Spotter
1 SSE Battle Creek, MI12:20 AM ESTCalhoun County
1.75″ golf ball size Broadcast Media
1 SE Brownlee Park, MI12:25 AM ESTCalhoun County

Showing the 15 largest of 117 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 February 27, 2024

NOAA radar put hail of an inch or more over 11 cities across 2 states on February 27, 2024. The largest stones — 1.00 inches, quarter size — were over Bolingbrook, IL. Every state hit is listed on this page, and every city under it.

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