Hail in Flat Rock · Aug 12, 2026
The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Flat Rock that day. Open it on the live map to see the swath over the streets.
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Convective day · Aug 12, 2026 · noon–noon UTC
Severity
The 6th most severe storm Flat Rock 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
- 50 /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 Flat Rock 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 Aug 12, 2026 — this storm produced no NEXRAD point detections over Flat Rock, so there is one map to show, not two.
The storm in context
Where Aug 12, 2026 sits in Flat Rock's hail record.
This was Flat Rock's 9th recorded hail day, arriving 16 days after the Jul 27, 2026 storm. By severity it ranks 6th of the 9 storms we have logged here. Radar put the day's largest stone over Flat Rock at 0.75" — radar-estimated size aloft.
The Aug 12, 2026 convective day was bigger than Flat Rock: the same system put hail over 507 other tracked cities, 79 of them in Illinois. Nearest: Oaktown (5 miles east, up to 1"); Carlisle (9 miles northeast, up to 0.5"); Bicknell (13 miles southeast, up to 1").
These maps are stills. In the app this date is one of 9 Flat Rock 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.
No ground reports were filed with the National Weather Service for this storm over Flat Rock. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Near the severe threshold
What 0.75" hail means for Flat Rock 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
$3.7M
Potential roof exposure — 307 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 2 jobs
- Illustrative work
- ~$30K
Close just 0.5% of the 307 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
August 2028
Claims from this storm can typically be filed until around August 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 $64 on top of the $150 plan.
Flat Rock hail history
Other storms in Flat Rock.
Estimated-size surface Jul 27, 2026
1.75"
Estimated-size surface Jul 26, 2026
0.5"
Estimated-size surface Jun 17, 2026
0.5"
Estimated-size surface May 16, 2026
1.25"
Estimated-size surface Apr 27, 2026
0.75"
Estimated-size surface Mar 22, 2026
1.75"
Estimated-size surface Mar 4, 2026
2"
Estimated-size surface Feb 19, 2026
1"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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