Hail map for Chatham, IL — July 27, 2026
NOAA radar detected hail up to 1.50″ — half dollar size — within 5 miles of Chatham on July 27, 2026.
- Max hail size
- 1.50″
- half dollar
- Impact rating
- 5/10
- from stone size
- Size bands over the city
- 2
- distinct radar bands
- Reached the ground
- 30%
- NOAA POSH probability
- Measured on the ground
- 1.75″
- 14.1 mi away · Trained Spotter
NOAA's Probability of Severe Hail peaked at 30% over Chatham that day — low to moderate: the radar signature was there, ground impact less certain. It is a separate model from the size estimate above: one asks how big the stones were in the storm, the other asks whether they made it down.
Sizes come from NOAA MRMS radar (MESH), which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.
Work Chatham on the live hail map
- The whole state around Chatham, with this swath already on it
- Three years of hail swaths, filterable by stone size
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Did hail hit your address?
This page covers Chatham 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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Other towns hit on July 27, 2026
What people on the ground measured in Chatham, IL 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.
- 1.75″ golf ball size Trained Spotter1 NE Tinley Park, IL · 14.1 mi away12:30 PM CDTCook County
- 1.50″ half dollar size Public1 E Greater Grand Cross, IL · 1.3 mi away1:17 PM CDTCook County
Relayed via mping. Time estimated by radar.
- 1.50″ half dollar size Public1 E La Grange Park, IL · 14.2 mi away12:01 PM CDTCook County
Relayed via mping.
- 1.25″ half dollar size Public1 W Northerly Island, IL · 8.2 mi away1:00 PM CDTCook County
Relayed via mping.
- 1.25″ half dollar size Public1 NNE Indian Head Park, IL · 14.6 mi away12:03 PM CDTCook County
Photo shared on social media of quarter to half dollar size hail in La Grange Highlands.
- 1.25″ half dollar size Public1 NW Countryside, IL · 14.7 mi away12:02 PM CDTCook County
Public report of hail up to half dollar size near 55th Street and Willow Springs Road. Most hail stones nickel size.
- 1.00″ quarter size Public1 SW Evergreen Park, IL · 6.0 mi away12:51 PM CDTCook County
Relayed via mping. Time estimated by radar.
- 1.00″ quarter size Public1 SSW Merrionette Park, IL · 7.0 mi away12:46 PM CDTCook County
Photo of hail in Alsip. Time estimated by radar.
- 1.00″ quarter size Public1 NW Oak Lawn, IL · 8.3 mi away12:50 PM CDTCook County
Relayed via mping. Time estimated by radar.
- 1.00″ quarter size Public1 W Midlothian, IL · 10.6 mi away1:01 PM CDTCook County
Relayed via mping. Time estimated by radar.
- 1.00″ quarter size Trained SpotterOak Forest, IL · 11.8 mi away12:50 PM CDTCook County
Also estimated 60 mph winds.
- 1.00″ quarter size Public1 W Oak Forest, IL · 12.7 mi away12:47 PM CDTCook County
Relayed via mping.
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.
Chatham hail on July 27, 2026
NOAA radar estimated stones up to 1.50 inches — half dollar size — within about 5 miles of Chatham that day, across 2 distinct size bands. Sizes vary street to street inside a single swath.