Hail size 1"
3 SSE Fontana-on-Geneva Walworth County
“(MKX)”
— NOAA / SPC storm report
/ Storm field report · Walworth
Hail in Lake Geneva · Aug 9, 2026
Hit 36 days ago
The estimated-size surface reached 1.5" aloft; NEXRAD logged no point detections over Lake Geneva that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 1.5" ≈ ping-pong ball · radar-estimated size aloft
Homes in the hail footprint 8,267
Ground reports 4 4 hail
Radar surfaces 1 Estimated size only
Convective day · Aug 9, 2026 · noon–noon UTC
Severity
The most severe storm Lake Geneva has seen in the last 12 months
Composite score · 5.2 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.2 /10
- Peak hail signal
- 38 /100
- Homes exposed
- 78 /100
- Ground truth
- 67 /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 Lake Geneva saw the hail — from two instruments
Aug 9, 2026 · Lake Geneva, WI
Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.
Radar-estimated hail size Surface resolved
Estimated size field Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.
Max size
1.5"
Only the radar-estimated size surface resolved for Aug 9, 2026 — this storm produced no NEXRAD point detections over Lake Geneva, so there is one map to show, not two.
The storm in context
Where Aug 9, 2026 sits in Lake Geneva's hail record.
This was Lake Geneva's 8th recorded hail day, arriving 13 days after the Jul 27, 2026 storm. By severity it ranks 1st of the 8 storms we have logged here. Radar put the day's largest stone over Lake Geneva at 1.5" — radar-estimated size aloft.
The Aug 9, 2026 convective day was bigger than Lake Geneva: the same system put hail over 453 other tracked cities, 41 of them in Wisconsin. Nearest: Genoa City (4 miles southeast, up to 1.5"); Walworth (8 miles southwest, up to 1.25"); Elkhorn (11 miles north, up to 0.5").
These maps are stills. In the app this date is one of 8 Lake Geneva 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
4 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
4 reports Hail size 1.5"
2 W Pell Lake Walworth County
“Report from mPING: Ping Pong Ball (1.50 in.). (MKX)”
— NOAA / SPC storm report
Hail size 1"
1 SSW Lake Geneva Walworth County
“(MKX)”
— NOAA / SPC storm report
Hail size 1.25"
3 SW Lake Geneva Walworth County
“Report from mPING: Half Dollar (1.25 in.). (MKX)”
— 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 21 minutes, from to .
Reports came from Fontana-On-Geneva and Pell Lake — beyond Lake Geneva itself.
High damage potential
What 1.5" hail means for Lake Geneva roofs.
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
What this storm is worth to a roofer.
8,267 homes × $12,000 avg. claim
Potential roof exposure
$99M
Potential roof exposure — 8,267 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 41 jobs
- Illustrative work
- ~$615K
Close just 0.5% of the 8,267 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 $1,736 on top of the $150 plan.
Lake Geneva hail history
Other storms in Lake Geneva.
8 recorded storm days in Lake Geneva, WI
Estimated-size surface Storm date Lake Geneva / WI
Jul 27, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Lake Geneva / WI
Jul 3, 2026
1.5" Signatures 1.5" Estimated 1"
No ground reports filed Open report →
NEXRAD surface Storm date Lake Geneva / WI
May 15, 2026
1" Signatures 1"
No ground reports filed Open report →
Estimated-size surface Storm date Lake Geneva / WI
Apr 17, 2026
1" Signatures 1" Estimated 0.5"
1 ground report Open report →
Estimated-size surface Storm date Lake Geneva / WI
Apr 14, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Lake Geneva / WI
Mar 31, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Lake Geneva / WI
Mar 10, 2026
0.5" 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 10, 2026.