The radar-estimated size surface caught this storm, reaching 0.75" aloft. NEXRAD logged no point detections over Sumner this day.
A tornado was also reported to the National Weather Service during this storm — see the ground reports below.
0.75"
≈ penny to nickel · radar-estimated size aloft2,940
1
1 tornadoOverview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
Only the radar-estimated size surface resolved for Jun 21, 2026 — this storm produced no NEXRAD point detections over Sumner, so there is one map to show, not two.
This was Sumner's 6th recorded hail day, arriving 4 days after the Jun 17, 2026 storm. By severity it ranks 2nd of the 8 storms we have logged here. Radar put the day's largest stone over Sumner at 0.75" — radar-estimated size aloft.
The Jun 21, 2026 convective day was bigger than Sumner: the same system put hail over 415 other tracked cities, 27 of them in Illinois. Nearest: Olney (11 miles west, up to 0.75"); Saint Francisville (11 miles east, up to 0.5"); Lawrenceville (15 miles northeast, up to 0.5").
These maps are stills from Sumner's Jun 21, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
These are storm reports filed with the National Weather Service and released through the NOAA Storm Prediction Center — public-domain observations from spotters, the public, and NWS surveys. We quote each one exactly as filed.
“EF1... max wind 95 mph... path length 3.2 miles... max width 300 yards The tornado developed 3 miles to the southwest of Hadley. It traveled east through farmland... da (ILX)”
— NOAA / SPC storm report
Reports came from Claremont — beyond Sumner itself.
Hail this size sits right at the edge of the National Weather Service severe threshold. Newer roofs usually shrug it off, but aging or already-worn shingles can bruise, and soft metals — vents, flashing, gutters — often show the first dents.
$35M
Potential roof exposure — 2,940 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Radar updates in real time, spotter reports appear on the map as they're filed, and the full Sumner storm history — this Jun 21, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
8 recorded storm days in Sumner, IL
Jul 26, 2026
0.75"
Jul 9, 2026
1"Jun 17, 2026
0.5"
May 16, 2026
1.25"
May 3, 2026
Apr 27, 2026
3"
Mar 22, 2026
1"