Illinois hail map — May 20, 2024
NOAA radar detected hail of an inch or more over 7 Illinois cities on May 20, 2024. The largest stones — 1.00″, quarter size — fell over Elgin.
- Cities hit
- 7
- 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.
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What people on the ground measured in Illinois on May 20, 2024
8 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.
- 1.00″ quarter size Public3 W Palos Park, IL2:49 PM CDTCook County
Public report of quarter size hail. Relayed via mping.
- 0.88″ penny size Trained Spotter1 S Bourbonnais, IL4:09 PM CDTKankakee County
Hail up to 0.9 inches in diameter measured in Bourbonnais. Hail occurred for 6 minutes ending at 412 pm.
- 0.75″ penny size Public2 E Huntley, IL1:55 PM CDTMcHenry County
Public report relayed via mping.
- 0.75″ penny size Cocorahs2.5 NNE Hoffman Estates, IL2:07 PM CDTCook County
- 0.75″ penny size Public1 SE Western Springs, IL2:20 PM CDTCook County
Public report of dime to penny size hail just south of Western Springs.
- 0.75″ penny size Public2 W Grant Park, IL3:22 PM CDTKankakee County
Public report of hail up to 0.75 inches diameter west of Grant Park. Also possible damage to trees. Time estimated by radar.
- 0.75″ penny size Public2 NE Bourbonnais, IL4:15 PM CDTKankakee County
Public report relayed via mping.
- 0.75″ penny size Emergency Mngr3 NW Wilmington, IL6:13 PM CDTWill County
Will County emergency manager reported penny size hail near I-55 and Lorenzo Rd northwest of Wilmington.
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 May 20, 2024
The full US hail map for May 20, 2024 →Other Illinois hail days
Illinois hail on May 20, 2024
NOAA radar put hail of an inch or more over 7 Illinois cities that day. The largest stones — 1.00 inches, quarter size — were over Elgin. Every city hit is listed above with its own stone size.