Hail size 1"
3 W Naperville DuPage County
“Report from mPING: Quarter (1.00 in.). (LOT)”
— NOAA / SPC storm report
/ Storm field report · DuPage
Hail in Naperville · Aug 9, 2026
Hit 39 days ago
The estimated-size surface reached 1.5" aloft; NEXRAD logged no point detections over Naperville that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 1.5" ≈ ping-pong ball · radar-estimated size aloft
Homes in the hail footprint 51,249
Ground reports 2 2 hail
Radar surfaces 1 Estimated size only
Convective day · Aug 9, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Naperville has seen in the last 12 months
Composite score · 5.1 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.1 /10
- Peak hail signal
- 38 /100
- Homes exposed
- 94 /100
- Ground truth
- 33 /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 Naperville saw the hail — from two instruments
Aug 9, 2026 · Naperville, IL
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 hail size Surface resolved
Estimated size field 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.
Max size
1.5"
Only the radar-estimated size surface resolved for Aug 9, 2026 — this storm produced no NEXRAD point detections over Naperville, so there is one map to show, not two.
The storm in context
Where Aug 9, 2026 sits in Naperville's hail record.
This was Naperville's 8th recorded hail day, arriving 13 days after the Jul 27, 2026 storm. By severity it ranks 2nd of the 8 storms we have logged here. Radar put the day's largest stone over Naperville at 1.5" — radar-estimated size aloft.
The Aug 9, 2026 convective day was bigger than Naperville: the same system put hail over 453 other tracked cities, 69 of them in Illinois. Nearest: Aurora (6 miles northwest, up to 1.5"); Bolingbrook (6 miles southeast, up to 0.75"); West Chicago (10 miles north, up to 1").
These maps are stills. In the app this date is one of 8 Naperville 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
2 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.
Hail reports
2 reports Hail size 1"
2 W Naperville DuPage County
“Report from mPING: Quarter (1.00 in.). (LOT)”
— NOAA / SPC storm report
High damage potential
What 1.5" hail means for Naperville roofs.
Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
51,249 homes × $12,000 avg. claim
Potential roof exposure
$615M
Potential roof exposure — 51,249 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 256 jobs
- Illustrative work
- ~$3.8M
Close just 0.5% of the 51,249 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 $10,762 on top of the $150 plan.
Naperville hail history
Other storms in Naperville.
8 recorded storm days in Naperville, IL
Estimated-size surface Storm date Naperville / IL
Jul 27, 2026
1.5" Estimated 1.5"
No ground reports filed Open report →
Estimated-size surface Storm date Naperville / IL
Jul 3, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Naperville / IL
Jul 2, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Naperville / IL
Jun 10, 2026
0.75" Estimated 0.75"
3 ground reports Open report →
NEXRAD surface Storm date Naperville / IL
Apr 17, 2026
No ground reports filed Open report →
Estimated-size surface Storm date Naperville / IL
Mar 30, 2026
1.75" Signatures 1.75" Estimated 1"
3 ground reports Open report →
Estimated-size surface Storm date Naperville / IL
Mar 10, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
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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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 10, 2026.