Hail size 1.25"
3 NW Homer Glen Will County
“Relayed via mping. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
/ Storm field report · DuPage
Hail in Lemont · Jul 27, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 4" aloft. At 4" — softball or larger — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.
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Peak hail signal 4" ≈ softball or larger · radar-estimated size aloft
Homes in the hail footprint 41,793
Ground reports 4 3 hail · 1 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · Jul 27, 2026 · noon–noon UTC
Severity
The most severe storm Lemont has seen in the last 12 months
Composite score · 9.3 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
9.3 /10
- Peak hail signal
- 100 /100
- Homes exposed
- 92 /100
- Ground truth
- 67 /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 Lemont saw the hail — from two instruments
Jul 27, 2026 · Lemont, IL
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
NEXRAD radar signatures Surface resolved
Radar signature field Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
Max size
0"
Detections
0
Radar-estimated hail size Surface resolved
Estimated size field The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Max size
4"
The storm in context
Where Jul 27, 2026 sits in Lemont's hail record.
This was Lemont's 7th recorded hail day, arriving 24 days after the Jul 3, 2026 storm. By severity it ranks 1st of the 7 storms we have logged here. Radar put the day's largest stone over Lemont at 4" — radar-estimated size aloft.
The Jul 27, 2026 convective day was bigger than Lemont: the same system put hail over 803 other tracked cities, 130 of them in Illinois. Nearest: Willow Springs (5 miles east, up to 4"); Bolingbrook (5 miles west, up to 3"); Homer Glen (7 miles south, up to 4").
These maps are stills. In the app this date is one of 7 Lemont 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
4 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
3 reports Hail size 1.75"
2 SE Lemont Cook County
“Relayed via mping. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
Hail size 1"
Darien DuPage County
“Relayed via mping. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
Wind reports
1 report Wind gust 78 mph
2 N Lemont DuPage County
“A 10m tower measured a peak wind gust of 77.6 mph. A 2 foot diameter willow tree was downed close by... as well. (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 Homer Glen and Darien — beyond Lemont itself.
Severe hail signal
What 4" hail means for Lemont roofs.
Two-inch-plus hail is capable of puncturing shingles, breaking skylights or windows, and heavily denting soft materials. The strongest radar bands warrant prompt inspection, but neither the signal nor the footprint confirms damage at a specific address.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
41,793 homes × $12,000 avg. claim
Potential roof exposure
$502M
Potential roof exposure — 41,793 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 209 jobs
- Illustrative work
- ~$3.1M
Close just 0.5% of the 41,793 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
July 2028
Claims from this storm can typically be filed until around July 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 $8,777 on top of the $150 plan.
Lemont hail history
Other storms in Lemont.
7 recorded storm days in Lemont, IL
Estimated-size surface Storm date Lemont / IL
Jul 3, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Lemont / IL
Jun 10, 2026
1" Estimated 1"
1 ground report Open report →
NEXRAD surface Storm date Lemont / IL
May 4, 2026
1" Signatures 1"
No ground reports filed Open report →
Estimated-size surface Storm date Lemont / IL
Mar 30, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Lemont / IL
Mar 26, 2026
1.75" Signatures 1.75" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Lemont / IL
Mar 10, 2026
1.25" Estimated 1.25"
19 ground reports 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.