The estimated-size surface reached 1.75" aloft; NEXRAD logged no point detections over Lombard that day. Open it on the live map to see the swath over the streets.
A tornado was also reported to the National Weather Service during this storm. The ground reports below show where it was filed.
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Convective day · Jul 27, 2026 · noon–noon UTC
Severity
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
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
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.
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.
Only the radar-estimated size surface resolved for Jul 27, 2026 — this storm produced no NEXRAD point detections over Lombard, so there is one map to show, not two.
The storm in context
This was Lombard's 3rd recorded hail day, arriving 24 days after the Jul 3, 2026 storm. By severity it ranks 1st of the 3 storms we have logged here. Radar put the day's largest stone over Lombard at 1.75" — radar-estimated size aloft.
The Jul 27, 2026 convective day was bigger than Lombard: the same system put hail over 803 other tracked cities, 130 of them in Illinois. Nearest: Berkeley (5 miles east, up to 1.75"); Melrose Park (5 miles east, up to 1.75"); Carol Stream (5 miles west, up to 1.75").
These maps are stills. In the app this date is one of 3 Lombard 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
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.
“Updates prior report. An NWS storm survey confirmed an EF-0 tornado with peak winds of 75 mph... peak width of 100 yards... and path length of 1 mile impacted Glen Elly (LOT)”
— NOAA / SPC storm report
“Concentrated tree damage on Stacy Court in North Glen Ellyn... including large trees snapped and/or uprooted... some onto homes and causing damage. This area lines up w (LOT)”
— NOAA / SPC storm report
“Relayed via mping. (LOT)”
— NOAA / SPC storm report
“Public report of ping pong ball size hail at Oakbrook Terrace. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
“Public report of golf ball size hail in Oak Brook. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
“Photo shared on social media showing a hailstone roughly two inches in diameter. (LOT)”
— NOAA / SPC storm report
“Relayed via mping. (LOT)”
— NOAA / SPC storm report
“Relayed via mping. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
“Relayed via mping. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
“Public report of nickel to quarter size hail in Villa Park. Some melting occurred prior to measurement. Time estimated by radar. (LOT)”
— NOAA / SPC storm report
“(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.
Hail was reported over 24 minutes, from to .
Reports came from Glendale Heights, Oakbrook Terrace, Oak Brook, York Center, Elmhurst, and Villa Park — beyond Lombard itself.
High damage potential
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
Potential roof exposure
$1B
Potential roof exposure — 85,513 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Close just 0.5% of the 85,513 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 $17,958 on top of the $150 plan.
Lombard hail history
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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