/ Storm field report · Mercer

Hail in North Henderson · Aug 12, 2026

Hit 31 days ago

NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 1.25" aloft. Open it on the live map to see the swath over the streets.

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Peak hail signal 1.25" ≈ half-dollar · radar-estimated size aloft
Homes in the hail footprint 1,186
Ground reports 0 none filed
Radar surfaces 2 NEXRAD + estimated size

Convective day · Aug 12, 2026 · noon–noon UTC

Severity

The most severe storm North Henderson has seen in the last 12 months

Composite score · 3.4 / 10
Storm severity score

Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.

3.4 /10
Peak hail signal
31 /100

Largest radar-indicated size — a signal of damage potential, not confirmation.

Homes exposed
61 /100

How many homes sit inside the storm's footprint.

Ground truth
0 /100

Independent storm reports filed with the NWS.

Evidence / storm surfaces

How North Henderson saw the hail — from two instruments

Aug 12, 2026 · North Henderson, IL

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.

NEXRAD radar signatures Surface resolved
NEXRAD radar-signature map of the hail storm over North Henderson, IL on Aug 12, 2026 Radar signature field

NEXRAD radar signatures — the point detections the storm produced overhead. A signature is where the radar saw hail, not a confirmed stone on the ground.

Max size 0" Detections 0
Radar-estimated hail size Surface resolved
Radar-estimated hail-size map of the storm over North Henderson, IL on Aug 12, 2026 Estimated size field

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 1.25"

The storm in context

Where Aug 12, 2026 sits in North Henderson's hail record.

This was North Henderson's 7th recorded hail day, arriving 40 days after the Jul 3, 2026 storm. By severity it ranks 1st of the 8 storms we have logged here. Radar put the day's largest stone over North Henderson at 1.25" — radar-estimated size aloft.

The Aug 12, 2026 convective day was bigger than North Henderson: the same system put hail over 507 other tracked cities, 79 of them in Illinois. Nearest: Rio (5 miles east, up to 1.25"); New Windsor (7 miles north, up to 1"); Galesburg (9 miles southeast, up to 1").

These maps are stills. In the app this date is one of 8 North Henderson 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

No reports filed with the NWS

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.

For this storm over North Henderson, the NWS report log is empty — a common outcome, since ground reports only happen when someone witnesses the hail and takes the time to call it in. The detection record for the date lives in the radar maps above.

Damage-capable hail signal

What 1.25" hail means for North Henderson roofs.

Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.

Radar reading · not confirmed damage

Roofing exposure

What this storm is worth to a roofer.

1,186 homes × $12,000 avg. claim

Potential roof exposure

$14M

Potential roof exposure — 1,186 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 1,186 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 $249 on top of the $150 plan.

North Henderson hail history

8 recorded storm days in North Henderson, IL

Take your next area into the field.

See the hail, review your recommendations, and canvass with Overview on iPhone.

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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 tells you where to look. Only an inspection confirms damage at an address. Last updated Aug 14, 2026.