Hail in Grant Park · Jul 27, 2026
The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Grant Park that day. Open it on the live map to see the swath over the streets.
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Convective day · Jul 27, 2026 · noon–noon UTC
Severity
The 5th most severe storm Grant Park has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 19 /100
- Homes exposed
- 62 /100
- Ground truth
- 0 /100
Largest radar-indicated size — a signal of damage potential, not confirmation.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Evidence / storm surfaces
How Grant Park saw the hail — from two instruments
Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.
Estimated size field Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.
Only the radar-estimated size surface resolved for Jul 27, 2026 — this storm produced no NEXRAD point detections over Grant Park, so there is one map to show, not two.
The storm in context
Where Jul 27, 2026 sits in Grant Park's hail record.
This was Grant Park's 9th recorded hail day, arriving 7 days after the Jul 20, 2026 storm. By severity it ranks 5th of the 10 storms we have logged here. Radar put the day's largest stone over Grant Park at 0.75" — radar-estimated size aloft.
The Jul 27, 2026 convective day was bigger than Grant Park: the same system put hail over 803 other tracked cities, 130 of them in Illinois. Nearest: Manteno (5 miles west, up to 0.5"); Peotone (9 miles northwest, up to 1"); Bourbonnais (10 miles west, up to 0.5").
These maps are stills. In the app this date is one of 10 Grant Park storm dates on a live map — both surfaces, the reports, and a replay — and the same map is where you draw the swath. This page rebuilds nightly.
Ground reports
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.
The National Weather Service logged no spotter reports for this storm over Grant Park. That absence is ordinary — filing a report takes a person on the spot who saw the hail and phoned it in. What stands as the record for this date is the radar above, which caught the storm regardless.
Near the severe threshold
What 0.75" hail means for Grant Park roofs.
A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$15M
Potential roof exposure — 1,219 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 6 jobs
- Illustrative work
- ~$90K
Close just 0.5% of the 1,219 homes in this footprint at the average $15,000 roof job. Illustrative math, not a projection — your results depend on your outreach and how the market responds.
Claim window
July 2028
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.
Names and phones for every home in the footprint: at most $256 on top of the $150 plan.
Grant Park hail history
Other storms in Grant Park.
Aug 11, 2026
1"
NEXRAD surface Jul 20, 2026
Estimated-size surface Jul 18, 2026
0.5"
Estimated-size surface Jun 11, 2026
1"
NEXRAD surface May 4, 2026
Estimated-size surface Apr 13, 2026
1.25"
Estimated-size surface Mar 31, 2026
0.5"
NEXRAD surface Mar 26, 2026
Estimated-size surface Mar 10, 2026
2"The next storm won’t wait for you.
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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