The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Romeoville that day. Open it on the live map to see the swath over the streets.
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Convective day · Aug 11, 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 Aug 11, 2026 — this storm produced no NEXRAD point detections over Romeoville, so there is one map to show, not two.
The storm in context
This was Romeoville's 3rd recorded hail day, arriving 15 days after the Jul 27, 2026 storm. By severity it ranks 2nd of the 3 storms we have logged here. Radar put the day's largest stone over Romeoville at 0.75" — radar-estimated size aloft.
The Aug 11, 2026 convective day was bigger than Romeoville: the same system put hail over 1,041 other tracked cities, 124 of them in Illinois. Nearest: Homer Glen (5 miles east, up to 0.75"); Bolingbrook (7 miles north, up to 0.5"); Plainfield (8 miles west, up to 0.75").
These maps are stills. In the app this date is one of 3 Romeoville 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.
“Peak wind gust of 58 mph measured by Davis weather station at NWS Chicago office. Severe gusts lasted for 5 to 10 minutes as the storm moved overhead. There are numerou (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.
Reports came from Nws Chicago-Romeoville — beyond Romeoville itself.
Near the severe threshold
A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.
Radar reading · not confirmed damage
Roofing exposure
Potential roof exposure
$421M
Potential roof exposure — 35,084 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Close just 0.5% of the 35,084 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
August 2028
Claims from this storm can typically be filed until around August 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 $7,368 on top of the $150 plan.
Romeoville hail history
See the hail, review your recommendations, and canvass with Overview on iPhone.
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