Hail size 1.5"
1 E La Grange Park Cook County
“Relayed via mping. (LOT)”
— NOAA / SPC storm report
Hail in Oak Park Jul 27, 2026
Hit 7 days agoThe radar-estimated size surface caught this storm, reaching 1.5" aloft. NEXRAD logged no point detections over Oak Park this day.
Largest hailstone
1.5"
≈ ping-pong ball · radar-estimated size aloft Homes in the hail footprint
225,554
Ground reports
1
1 hailThe most severe storm Oak Park has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.0 /10
- Hail size
- 38 /100
- Homes exposed
- 100 /100
- Ground truth
- 17 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Oak Park saw the hail — from two instruments
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.
Radar-estimated hail size
Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
Max size
1.5"
Only the radar-estimated size surface resolved for Jul 27, 2026 — this storm produced no NEXRAD point detections over Oak Park, so there is one map to show, not two.
Where Jul 27, 2026 sits in Oak Park's hail record
This was Oak Park's 3rd recorded hail day, arriving 24 days after the Jul 3, 2026 storm. By severity it ranks 1st of the 3 storms we have logged here. Radar put the day's largest stone over Oak Park at 1.5" — radar-estimated size aloft.
The Jul 27, 2026 convective day was bigger than Oak Park: the same system put hail over 803 other tracked cities, 130 of them in Illinois. Nearest: Berkeley (5 miles west, up to 1.75"); Melrose Park (5 miles west, up to 1.75"); Chicago (6 miles southeast, up to 2.75").
These maps are stills from Oak Park's Jul 27, 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.
What people on the ground reported
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.
Hail reports
1 report
Storm forensics
Read from the arrival times and locations of the NOAA ground reports,
not a radar-measured storm track.
How the storm moved
Reports came from La Grange Park — beyond Oak Park itself.
What 1.5" hail means for Oak Park roofs
At an inch and a half, hail cracks shingles, strips granules down to the mat, and dents gutters, vents, and siding. A footprint like this typically produces a wave of insurance claims — and the contractor who reaches the homeowner first usually gets the inspection.
What this storm is worth to a roofer
$2.7B
Potential roof exposure — 225,554 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Illustrative jobs
1,128 jobs
Illustrative work
~$17M
Claims from this storm can typically be filed until around July 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Track hail over Oak Park on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Oak Park storm history — this Jul 27, 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
Oak Park hail history
← All hail in Oak Park 3 recorded storm days in Oak Park, IL
Other storms in Oak Park
A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.