Illinois experiences significant hail activity from spring through early fall, with the Chicago metro and northern Illinois corridor recording some of the highest-value hail damage claims in the Midwest. This page shows live NOAA/SPC hail reports for Illinois in the last 30 days — updated every 6 hours.
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Hail Events
7
Active Days
1
Counties Hit
7
Largest Hail
2.50" (golf ball)
Scope: reported hail across Illinois during the rolling 30-day source window · Retrieved Sep 15, 2026, 8:17 PM UTC
Sorted by hail size · Source: NOAA Storm Prediction Center
2.50" (golf ball)
Highland, Madison County
Aug 21, 2026 · 7:55 AM
Picture of tennis ball size hail relayed from a viewer of WCIA. (LSX)
Severe
2.00" (golf ball)
Aviston, Clinton County
Aug 21, 2026 · 8:25 AM
(LSX)
Severe
1.50" (ping pong ball)
3 N Mendota, La Salle County
Aug 21, 2026 · 11:05 PM
Multiple photos depict hail just larger than ping pong balls. Time estimated by radar. (LOT)
Moderate
1.00" (quarter)
1 WNW Savanna, Carroll County
Aug 21, 2026 · 11:49 PM
Broadcast media report of quarter-sized hail in Savanna. Time estimated by radar. (DVN)
Moderate
1.00" (quarter)
1 N Machesney Park, Winnebago County
Aug 21, 2026 · 8:55 PM
Photo shared to email service account showing hailstones ranging in size between dime to quarter -- 0.5 to 1.0 inch -- in diameter. Time estimated by radar. (LOT)
Moderate
Recent Hail Reports — Illinois
Showing 7 of 7 events across Illinois · Updated every 6 hours
Date
Location
County
Hail Size
Notes
Aug 21, 2026
1 WNW Savanna
Carroll
1.00" (quarter)
Broadcast media report of quarter-sized hail in Savanna. Time estimated by radar. (DVN)
Aug 21, 2026
3 N Mendota
La Salle
1.50" (ping pong ball)
Multiple photos depict hail just larger than ping pong balls. Time estimated by radar. (LOT)
Aug 21, 2026
1 N Machesney Park
Winnebago
1.00" (quarter)
Photo shared to email service account showing hailstones ranging in size between dime to quarter -- 0.5 to 1.0 inch -- in diameter. Time estimated by radar. (LOT)
Aug 21, 2026
3 E Sycamore
De Kalb
1.00" (quarter)
Report from mPING: Quarter (1.00 in.). (LOT)
Aug 21, 2026
Aviston
Clinton
2.00" (golf ball)
(LSX)
Aug 21, 2026
Highland
Madison
2.50" (golf ball)
Picture of tennis ball size hail relayed from a viewer of WCIA. (LSX)
Aug 21, 2026
Vernon
Marion
1.00" (quarter)
Pictures of hail from emergency manager near the Patoka and Vernon area. (LSX)
About These Illinois Hail Reports
THOR displays the most recent reported hail events from the NOAA Storm Prediction Center. Reports are preliminary and may be corrected or updated by the source.
This page is a Illinois statewide summary for the rolling 30-day window. Use THOR’s interactive map to research a ZIP code, address, county, or place and review the broader storm context.
Hail Activity in Illinois: What Contractors Need to Know
Illinois averages 40+ significant hail days per year. DuPage, Will, and Cook Counties in the Chicago suburbs are high-frequency hail targets due to storm systems tracking northeast from the Great Plains. The July 2011 Chicago hailstorm caused over $500 million in insured losses.
Top Hail Markets in Illinois
Chicago Metro / DuPage County
Rockford
Peoria
Springfield
Naperville / Will County
How THOR Helps Illinois Contractors
✓Real-time hail event maps updated from NOAA/SPC data
✓Radar replay — scrub through any storm frame by frame
✓Impact density by county and ZIP code
✓CSV export for SalesRabbit, Spotio, and Excel
✓Push alerts when hail hits your target area
✓Property storm history reports for door-to-door canvassing
Track Illinois Hail Events in Real Time
Open the full interactive app with a free 14-day trial: the Illinois hail map, hail swaths, radar replay, ZIP and address search, built-in canvassing, and CSV export. No card required.