Hail map for Alton, IL — May 19, 2025
Hail up to 1.00″ — quarter size — was estimated within 5 miles of Alton on May 19, 2025.
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- The May 19, 2025 swath — and every other storm since 2023 across Illinois
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- Max hail size
- 1.00″
- quarter
- Impact rating
- 3/10
- from stone size
- Size bands over the city
- 1
- distinct radar bands
- Measured on the ground
- 2.00″
- 9.6 mi away · Trained Spotter
Sizes come from NOAA radar, which runs about ±0.25″ against ground truth. It is canvass-targeting quality, not claim evidence.
Did hail hit your address?
This page covers Alton 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.
Check my addressFree, and no account needed to look it up. If hail did hit, you'll have the date and the stone size in writing — which is the first thing an adjuster asks for.
What people on the ground measured in Alton, IL on May 19, 2025
8 reports filed with the National Weather Service — 5 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 Trained Spotter1 N Florissant, MO · 9.6 mi away9:01 PM CDTSt. Louis County
Observer estimated wind gusts around 40 mph.
- 1.75″ golf ball size Law EnforcementFlorissant, MO · 10.1 mi away8:56 PM CDTSt. Louis County
Via Slack: Missouri State Highway Patrol reported golf ball sized hail in Florissant.
- 1.50″ half dollar size Trained Spotter1 NNE Berkeley, MO · 12.5 mi away8:58 PM CDTSt. Louis County
- 1.50″ half dollar size Public2 WNW Hazelwood, MO · 13.1 mi away8:56 PM CDTSt. Louis County
Via Facebook: 1.5 inch hail measured with ruler.
- 1.25″ half dollar size Trained Spotter1 NNW Hazelwood, MO · 12.2 mi away8:58 PM CDTSt. Louis County
- 1.25″ half dollar size Public1 NW Hazelwood, MO · 12.2 mi away8:57 PM CDTSt. Louis County
- 1.00″ quarter size Trained SpotterFlorissant, MO · 9.6 mi away9:00 PM CDTSt. Louis County
- 1.00″ quarter size Trained SpotterHazelwood, MO · 12.2 mi away8:45 PM CDTSt. Louis County
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.
Shopping for a hail app to work Alton, IL?
This page is one storm. If you are deciding which tool to work Alton, IL 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.
- HailMate vs HailTraceStreet-level NOAA swaths on a map your crew can knock, with the CRM already inside — instead of quote-only meteorologist maps billed on top of one.
- Hail map apps for roofers (and the Hail Recon alternative)Every storm on one map instead of loading dates one at a time — plus the canvassing and the whole claim, monthly, for what one state costs them a year.
- Best canvassing apps, comparedHailMate, SalesRabbit, SPOTIO, Knockio, RoofLink and Badger Maps — every published price sourced and linked, and two of them publish none.
Alton hail on May 19, 2025
Hail up to 1.00 inches — quarter size — was estimated within about 5 miles of Alton that day, across 1 distinct size band. Sizes vary street to street inside a single swath.