Hail in Hillsboro · Aug 18, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Hillsboro that day. Open it on the live map to see the swath over the streets.
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Convective day · Aug 18, 2026 · noon–noon UTC
Severity
The 5th most severe storm Hillsboro has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 13 /100
- Homes exposed
- 54 /100
- Ground truth
- 0 /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 Hillsboro saw the hail — from two instruments
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 18, 2026 — this storm produced no NEXRAD point detections over Hillsboro, so there is one map to show, not two.
The storm in context
Where Aug 18, 2026 sits in Hillsboro's hail record.
This was Hillsboro's 6th recorded hail day, arriving 48 days after the Jul 1, 2026 storm. By severity it ranks 5th of the 7 storms we have logged here. Radar put the day's largest stone over Hillsboro at 0.5" — radar-estimated size aloft.
The Aug 18, 2026 convective day was bigger than Hillsboro: the same system put hail over 309 other tracked cities, 36 of them in Wisconsin. Nearest: Kendall (7 miles north, up to 0.5"); Wonewoc (9 miles southeast, up to 0.5"); Cashton (15 miles west, up to 0.75").
These maps are stills. In the app this date is one of 7 Hillsboro 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
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.
No ground reports were filed with the National Weather Service for this storm over Hillsboro. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Below the severe threshold
What 0.5" hail means for Hillsboro roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$6.1M
Potential roof exposure — 509 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 3 jobs
- Illustrative work
- ~$45K
Close just 0.5% of the 509 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 $107 on top of the $150 plan.
Hillsboro hail history
Other storms in Hillsboro.
Estimated-size surface Sep 1, 2026
0.5"
Estimated-size surface Jul 1, 2026
3.5"
Estimated-size surface Jun 30, 2026
1.75"
Estimated-size surface Jun 10, 2026
0.5"
Estimated-size surface Jun 5, 2026
1"
Estimated-size surface Apr 14, 2026
1.75"Take your next area into the field.
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