Hail size 1"
1 NE Fond Du Lac Fond du Lac County
“Delayed Storm Report. Quarter sized hail. (MKX)”
— NOAA / SPC storm report
/ Storm field report · Fond du Lac
Hail in Fond Du Lac · Aug 18, 2026
Hit 25 days ago
The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Fond Du Lac that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 0.75" ≈ penny to nickel · radar-estimated size aloft
Homes in the hail footprint 15,230
Ground reports 2 2 hail
Radar surfaces 1 Estimated size only
Convective day · Aug 18, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Fond Du Lac has seen in the last 12 months
Composite score · 3.7 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.7 /10
- Peak hail signal
- 19 /100
- Homes exposed
- 84 /100
- Ground truth
- 33 /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 Fond Du Lac saw the hail — from two instruments
Aug 18, 2026 · Fond Du Lac, WI
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.
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
0.75"
Only the radar-estimated size surface resolved for Aug 18, 2026 — this storm produced no NEXRAD point detections over Fond Du Lac, so there is one map to show, not two.
The storm in context
Where Aug 18, 2026 sits in Fond Du Lac's hail record.
This was Fond Du Lac's 4th recorded hail day, arriving 22 days after the Jul 27, 2026 storm. By severity it ranks 3rd of the 4 storms we have logged here. Radar put the day's largest stone over Fond Du Lac at 0.75" — radar-estimated size aloft.
The Aug 18, 2026 convective day was bigger than Fond Du Lac: the same system put hail over 309 other tracked cities, 36 of them in Wisconsin. Nearest: Mount Calvary (7 miles east, up to 0.5"); Van Dyne (10 miles northwest, up to 0.75"); Oakfield (10 miles southwest, up to 0.5").
These maps are stills. In the app this date is one of 4 Fond Du Lac 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
2 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
2 reports Hail size 1"
1 SSE Fond Du Lac Fond du Lac County
“Spotter report of quarter sized hail in Fond du Lac. (MKX)”
— NOAA / SPC storm report
Near the severe threshold
What 0.75" hail means for Fond Du Lac roofs.
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
What this storm is worth to a roofer.
15,230 homes × $12,000 avg. claim
Potential roof exposure
$183M
Potential roof exposure — 15,230 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 76 jobs
- Illustrative work
- ~$1.1M
Close just 0.5% of the 15,230 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 $3,198 on top of the $150 plan.
Fond Du Lac hail history
Other storms in Fond Du Lac.
4 recorded storm days in Fond Du Lac, WI
Estimated-size surface Storm date Fond Du Lac / WI
Jul 27, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Fond Du Lac / WI
Jul 1, 2026
3" Signatures 3" Estimated 1"
8 ground reports Open report →
Estimated-size surface Storm date Fond Du Lac / WI
Mar 31, 2026
1.5" Signatures 1.5" Estimated 0.75"
No ground reports filed Open report →
Take your next area into the field.
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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 19, 2026.