Hail size 1"
Aurora Kane County
“Corrects the time previous hail report from Aurora. Report of nickel to quarter sized hail in Aurora. Time estimated via radar. (LOT)”
— NOAA / SPC storm report
/ Storm field report · Kendall
Hail in Oswego · Mar 30, 2026
NEXRAD logged 0 hail signatures up to 1.75"; 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 1.75" ≈ golf ball · the largest NEXRAD radar signature
Homes in the hail footprint 50,289
Ground reports 2 2 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Mar 30, 2026 · noon–noon UTC
Severity
The most severe storm Oswego has seen in the last 12 months
Composite score · 5.5 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.5 /10
- Peak hail signal
- 44 /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 Oswego saw the hail — from two instruments
Mar 30, 2026 · Oswego, 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
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
1.75"
Detections
0
Radar-estimated hail size Surface resolved
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 Mar 30, 2026 sits in Oswego's hail record.
This was Oswego's 2nd recorded hail day, arriving 4 days after the Mar 26, 2026 storm. By severity it ranks 1st of the 6 storms we have logged here. Radar put the day's largest stone over Oswego at 1.75" — the largest NEXRAD radar signature.
The Mar 30, 2026 convective day was bigger than Oswego: the same system put hail over 313 other tracked cities, 70 of them in Illinois. Nearest: Yorkville (5 miles west, up to 1.75"); Naperville (6 miles northeast, up to 1.75"); Aurora (7 miles north, up to 1.75").
These maps are stills. In the app this date is one of 6 Oswego 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"
Boulder Hill Kendall County
“Time estimated from radar. (LOT)”
— NOAA / SPC storm report
Storm forensics
How the storm moved
Timing and place names from NOAA ground reports
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Reports came from Aurora and Boulder Hill — beyond Oswego itself.
High damage potential
What 1.75" hail means for Oswego 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.
50,289 homes × $12,000 avg. claim
Potential roof exposure
$603M
Potential roof exposure — 50,289 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 251 jobs
- Illustrative work
- ~$3.8M
Close just 0.5% of the 50,289 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
March 2028
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.
Names and phones for every home in the footprint: at most $10,561 on top of the $150 plan.
Oswego hail history
Other storms in Oswego.
6 recorded storm days in Oswego, IL
Estimated-size surface Storm date Oswego / IL
Jul 27, 2026
1.25" Signatures 1" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Oswego / IL
Jul 3, 2026
1.5" Signatures 1.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Oswego / IL
Jul 2, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Oswego / IL
Jun 10, 2026
0.75" Estimated 0.75"
1 ground report Open report →
NEXRAD surface Storm date Oswego / IL
Mar 26, 2026
1" Signatures 1"
No ground reports filed Open report →
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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 3, 2026.