Hail size 2.5"
2 NE Bolingbrook Will County
“(LOT)”
— NOAA / SPC storm report
/ Storm field report · DuPage
Hail in Lemont · Mar 10, 2026
The estimated-size surface reached 1.25" aloft; NEXRAD logged no point detections over Lemont that day. 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 26,241
Ground reports 19 19 hail
Radar surfaces 1 Estimated size only
Convective day · Mar 10, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Lemont has seen in the last 12 months
Composite score · 5.6 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.6 /10
- Peak hail signal
- 31 /100
- Homes exposed
- 88 /100
- Ground truth
- 100 /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
Mar 10, 2026 · Lemont, 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
1.25"
Only the radar-estimated size surface resolved for Mar 10, 2026 — this storm produced no NEXRAD point detections over Lemont, so there is one map to show, not two.
The storm in context
Where Mar 10, 2026 sits in Lemont's hail record.
This was Lemont's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 2nd of the 7 storms we have logged here. Radar put the day's largest stone over Lemont at 1.25" — radar-estimated size aloft.
The Mar 10, 2026 convective day was bigger than Lemont: the same system put hail over 470 other tracked cities, 100 of them in Illinois. Nearest: Bolingbrook (5 miles west, up to 1.25"); Western Springs (9 miles northeast, up to 1.25"); Lisle (9 miles northwest, up to 1").
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
19 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
19 reports Hail size 1.75"
1 NNE Bolingbrook Will County
“Trained spotter reports golfball size hail in Bolingbrook. (LOT)”
— NOAA / SPC storm report
Hail size 3"
1 ESE Woodridge DuPage County
“Photo shared of hail measuring 3 inches in diameter near intersection of 75th Street and Interstate 355. (LOT)”
— NOAA / SPC storm report
Hail size 3"
1 SW Woodridge DuPage County
“3 inch diameter hail in southern Woodridge. Relayed via mping. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
Hail size 1.5"
2 S Woodridge DuPage County
“Report from mPING. (LOT)”
— NOAA / SPC storm report
Hail size 3"
2 S Woodridge DuPage County
“delayed report. (LOT)”
— NOAA / SPC storm report
Hail size 1"
1 SSE Bolingbrook Will County
“Corrects previous tstm wnd dmg report from 1 SSE Bolingbrook. Quarter size hail reported near I-55 and IL-53. Relayed via mping. (LOT)”
— NOAA / SPC storm report
Hail size 3"
Bolingbrook Will County
“Photo shared of hail measuring just over 3 inches in diameter in Bolingbrook. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
Hail size 3.75"
1 NW Darien DuPage County
“Photo shared to social media shows 3.75 inch hail on Washington Street in Darien. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
Hail size 4.8"
Darien DuPage County
“Photo shared to office email account of hailstone measuring 4.8 inches in diameter near the intersection of 75th Street and Cass Ave in Darien. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
Hail size 3.25"
2 ENE Woodridge DuPage County
“(LOT)”
— NOAA / SPC storm report
Hail size 2.5"
1 E Woodridge DuPage County
“Public report of tennis ball size hail in southwest Downers Grove. (LOT)”
— NOAA / SPC storm report
Hail size 2.75"
1 E Woodridge DuPage County
“(LOT)”
— NOAA / SPC storm report
Hail size 1.25"
2 W Darien DuPage County
“Trained spotter reports quarter to half dollar size hail near 75th and Main Street in Downers Grove. (LOT)”
— NOAA / SPC storm report
Hail size 1.75"
1 SW Darien DuPage County
“Trained spotter reports golfball size hail in Darien. (LOT)”
— NOAA / SPC storm report
Hail size 2.5"
1 W Darien DuPage County
“Damage reported to cars and roofs. (LOT)”
— NOAA / SPC storm report
Hail size 1"
1 S Darien DuPage County
“Trained spotter reports quarter size hail at I-55 and Cass Avenue in Darien. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
Hail size 1.75"
1 SE Woodridge DuPage County
“Relayed via mping. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
Hail size 1"
Woodridge DuPage County
“Photo shared on social media showed hail approximately 1 inch in diameter. (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.
Hail was reported over 23 minutes, from to .
Reports came from Bolingbrook, Woodridge, and Darien — beyond Lemont itself.
Damage-capable hail signal
What 1.25" hail means for Lemont 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.
26,241 homes × $12,000 avg. claim
Potential roof exposure
$315M
Potential roof exposure — 26,241 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 131 jobs
- Illustrative work
- ~$2M
Close just 0.5% of the 26,241 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 $5,511 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 27, 2026
4" Estimated 4"
4 ground reports Open report →
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 →
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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.