Illinois hail map — May 3, 2026
NOAA radar detected hail of an inch or more over 1 Illinois city on May 3, 2026. The largest stones — 1.00″, quarter size — fell over Alton.
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- Cities hit
- 1
- 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 May 3, 2026
What people on the ground measured in Illinois on May 3, 2026
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 W Alton, IL11:00 PM CDTMadison County
Email report showing 2 inch stone next to tape measure. time estimated from radar.
- 1.75″ golf ball size Public1 NE Alton, IL10:58 PM CDTMadison County
Report from mPING: Golf Ball (1.75 in.).
- 1.75″ golf ball size Trained Spotter1 S Godfrey, IL10:59 PM CDTMadison County
- 1.50″ half dollar size Public2 NW Alton, IL10:55 PM CDTMadison County
Report from mPING: Ping Pong Ball (1.50 in.).
- 1.50″ half dollar size Amateur Radio1 NNE Bethalto, IL11:05 PM CDTMadison County
- 1.00″ quarter size Broadcast MediaAssumption, IL10:53 PM CDTChristian County
Time estimated from radar.
- 1.00″ quarter size Public3 SW Godfrey, IL10:55 PM CDTMadison County
Report from mPING: Quarter (1.00 in.).
- 1.00″ quarter size Amateur RadioAlton, IL10:58 PM CDTMadison County
- 1.00″ quarter size Amateur RadioBethalto, IL11:06 PM CDTMadison County
- 1.00″ quarter size Public5 NNE Plainview, IL11:42 PM CDTMacoupin County
Via email, no photo. time estimated via radar.
- 0.75″ penny size Emergency MngrShelbyville, IL11:17 PM CDTShelby County
- 0.70″ penny size Trained Spotter3 NW Alton, IL10:58 PM CDTMadison County
Showing the 12 largest of 14 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 Illinois hail days
Shopping for a hail app to work Illinois?
This page is one storm. If you are deciding which tool to work Illinois with all season, these compare the ones roofers actually buy — with every price taken from the vendor's own site and linked.
- Best hail tracking apps, comparedHailMate, HailTrace, Hail Recon, HailStrike and RadarScope — every published price sourced and linked, and who each one is genuinely right for.
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- Best canvassing apps, comparedHailMate, SalesRabbit, SPOTIO, Knockio, RoofLink and Badger Maps — every published price sourced and linked, and two of them publish none.
Illinois hail on May 3, 2026
NOAA radar put hail of an inch or more over 1 Illinois city that day. The largest stones — 1.00 inches, quarter size — were over Alton. Every city hit is listed above with its own stone size.