Hail in Harmon · Aug 11, 2026
The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Harmon that day. Open it on the live map to see the swath over the streets.
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Convective day · Aug 11, 2026 · noon–noon UTC
Severity
The most severe storm Harmon 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
- 63 /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 Harmon saw the hail — from two instruments
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 Aug 11, 2026 — this storm produced no NEXRAD point detections over Harmon, so there is one map to show, not two.
The storm in context
Where Aug 11, 2026 sits in Harmon's hail record.
This was Harmon's 5th recorded hail day, arriving 2 days after the Aug 9, 2026 storm. By severity it ranks 1st of the 5 storms we have logged here. Radar put the day's largest stone over Harmon at 0.75" — radar-estimated size aloft.
The Aug 11, 2026 convective day was bigger than Harmon: the same system put hail over 1,041 other tracked cities, 124 of them in Illinois. Nearest: Ohio (7 miles south, up to 0.75"); Dixon (7 miles north, up to 0.5"); Rock Falls (8 miles west, up to 0.75").
These maps are stills. In the app this date is one of 5 Harmon 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 Harmon. 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 Harmon 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
$18M
Potential roof exposure — 1,492 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 7 jobs
- Illustrative work
- ~$105K
Close just 0.5% of the 1,492 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 $313 on top of the $150 plan.
Harmon hail history
Other storms in Harmon.
Estimated-size surface Aug 9, 2026
1"
Estimated-size surface Jun 24, 2026
0.5"
Estimated-size surface Apr 13, 2026
0.5"
Estimated-size surface Mar 31, 2026
0.75"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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