Hail size 1"
5 NNW Plainfield Will County
“Time estimated via radar. (LOT)”
— NOAA / SPC storm report
Hail in Naperville Mar 30, 2026
Both radar surfaces caught this storm: NEXRAD logged 0 hail signatures up to 1.75", and the radar-estimated size reached 1" aloft.
Largest hailstone
1.75"
≈ golf ball · the largest NEXRAD radar signature Homes in the hail footprint
44,043
Ground reports
3
3 hailThe most severe storm Naperville has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.7 /10
- Hail size
- 44 /100
- Homes exposed
- 93 /100
- Ground truth
- 50 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Naperville saw the hail — from two instruments
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
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
1.75"
Detections
0
Radar-estimated hail size
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"
Where Mar 30, 2026 sits in Naperville's hail record
This was Naperville's 2nd recorded hail day, arriving 20 days after the Mar 10, 2026 storm. By severity it ranks 1st of the 7 storms we have logged here. Radar put the day's largest stone over Naperville at 1.75" — the largest NEXRAD radar signature.
The Mar 30, 2026 convective day was bigger than Naperville: the same system put hail over 313 other tracked cities, 70 of them in Illinois. Nearest: Aurora (5 miles west, up to 1.75"); Lisle (5 miles east, up to 1.75"); West Chicago (7 miles north, up to 1").
These maps are stills from Naperville's Mar 30, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
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.
Hail reports
3 reports Hail size 1.25"
3 NW Romeoville Will County
“Report from mPING: Half Dollar (1.25 in.). (LOT)”
— NOAA / SPC storm report
Hail size 1"
4 NE Aurora DuPage County
“Time estimated via radar. (LOT)”
— NOAA / SPC storm report
Storm forensics
Read from the arrival times and locations of the NOAA ground reports,
not a radar-measured storm track.
How the storm moved
Hail was reported over 14 minutes, from to .
Reports came from Plainfield, Romeoville, and Aurora — beyond Naperville itself.
What 1.75" hail means for Naperville roofs
At an inch and a half, hail cracks shingles, strips granules down to the mat, and dents gutters, vents, and siding. A footprint like this typically produces a wave of insurance claims — and the contractor who reaches the homeowner first usually gets the inspection.
What this storm is worth to a roofer
$529M
Potential roof exposure — 44,043 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Illustrative jobs
220 jobs
Illustrative work
~$3.3M
Claims from this storm can typically be filed until around March 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Track hail over Naperville on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Naperville storm history — this Mar 30, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
Naperville hail history
← All hail in Naperville 7 recorded storm days in Naperville, IL
Other storms in Naperville
Jul 27, 2026
1.5" Estimated 1.5"
No ground reports filed 
Jul 3, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed 
Jul 2, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed 
Jun 10, 2026
0.75" Estimated 0.75"
3
ground reports 
Apr 17, 2026
Mar 10, 2026
0.5" Estimated 0.5"
No ground reports filed
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 surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.