The radar-estimated size surface caught this storm, reaching 0.75" aloft. NEXRAD logged no point detections over Olney 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 aloft684
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.
We map this storm two ways: the NEXRAD radar signatures the storm produced overhead, and the radar-estimated size of the hail in the air. The two surfaces don’t have to match — where they diverge is where estimated size aloft ran ahead of, or behind, what the signatures caught.
Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
Only the radar-estimated size surface resolved for Jun 21, 2026 — this storm produced no NEXRAD point detections over Olney, so there is one map to show, not two.
This was Olney's 7th recorded hail day, arriving 12 days after the Jun 9, 2026 storm. By severity it ranks 4th of the 10 storms we have logged here. Radar put the day's largest stone over Olney at 0.75" — radar-estimated size aloft.
The Jun 21, 2026 convective day was bigger than Olney: the same system put hail over 415 other tracked cities, 27 of them in Illinois. Nearest: Sumner (11 miles east, up to 0.75"); Dundas (14 miles north, up to 0.75"); Albion (17 miles south, up to 0.5").
These maps are stills from Olney'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 Olney 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.
$8.2M
Potential roof exposure — 684 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 Olney 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
10 recorded storm days in Olney, IL
Jul 17, 2026
0.5"
Jul 9, 2026
1.25"
Jun 25, 2026
0.75"
Jun 9, 2026
0.75"
May 16, 2026
3"
Apr 27, 2026
3.25"
Mar 22, 2026
1"
Feb 19, 2026
0.5"
Jan 8, 2026
2.5"