Illinois hail map — April 18, 2024
NOAA radar detected hail of an inch or more over 3 Illinois cities on April 18, 2024. The largest stones — 1.00″, quarter size — fell over Granite City.
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- Cities hit
- 3
- in Illinois
- Largest stone
- 1.00″
- quarter size
- Impact rating
- 3/10
- from stone size
Sizes come from NOAA radar, which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.
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Illinois cities hit on April 18, 2024
What people on the ground measured in Illinois on April 18, 2024
12 reports filed with the National Weather Service — 3 from trained observers or officials. These are measured stones, not radar estimates, so they are the closest thing to proof that hail actually reached the ground.
- 2.00″ hen egg size Public3 S Cypress, IL4:45 PM CDTJohnson County
Corrects previous hail report from 3 S Cypress. Delayed report. Hail larger than golfballs.
- 1.75″ golf ball size Public3 ENE Roodhouse, IL4:40 PM CDTGreene County
Observer also reported a horizontal roll cloud.
- 1.50″ half dollar size Public3 S Cypress, IL4:46 PM CDTJohnson County
Relayed via Facebook.
- 1.50″ half dollar size Public2 S Benld, IL6:04 PM CDTMacoupin County
Report from mPING: Ping Pong Ball (1.50 in.).
- 1.25″ half dollar size PublicOkawville, IL6:55 PM CDTWashington County
- 1.25″ half dollar size PublicWoodlawn, IL7:41 PM CDTJefferson County
Corrects previous hail report from Woodlawn.
- 1.25″ half dollar size PublicWoodlawn, IL7:43 PM CDTJefferson County
- 1.00″ quarter size Trained Spotter1 NNE White Hall, IL4:36 PM CDTGreene County
- 1.00″ quarter size Trained SpotterRoodhouse, IL4:37 PM CDTGreene County
- 1.00″ quarter size Emergency Mngr2 S Addieville, IL7:02 PM CDTWashington County
- 0.25″ penny size PublicPlymouth, IL2:35 PM CDTHancock County
- 0.25″ penny size Public3 E Colmar, IL2:43 PM CDTMcDonough County
Showing the 12 largest of 17 hail reports filed that day.
These are verified ground reports, updated 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 Illinois hail days
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Illinois hail on April 18, 2024
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 Granite City. Every city hit is listed above with its own stone size.