NEXRAD logged 0 hail signatures up to 1.75"; the estimated-size surface reached 0.75" aloft. 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 · Apr 17, 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
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 signature field The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.
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.
The storm in context
This was Waterford's 2nd recorded hail day, arriving 18 days after the Mar 30, 2026 storm. By severity it ranks 1st of the 5 storms we have logged here. Radar put the day's largest stone over Waterford at 1.75" — the largest NEXRAD radar signature.
The Apr 17, 2026 convective day was bigger than Waterford: the same system put hail over 1,016 other tracked cities, 178 of them in Wisconsin. Nearest: East Troy (5 miles west, up to 1.75"); Big Bend (9 miles northeast, up to 1"); Burlington (11 miles south, up to 1").
These maps are stills. In the app this date is one of 5 Waterford 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.
“NWS Damage Survey concludes an EF-0 tornado occurred with estimated peak winds of 70 mph and a width of 75 yards. The tornado started near the intersection of Kelsey Dr (MKX)”
— NOAA / SPC storm report
“NWS Damage Survey concludes an EF-0 tornado occurred with estimated peak winds of 70 mph and a path width of 70 yards. This tornado began at the intersection of Wiscons (MKX)”
— 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 20 minutes, from to .
Reports came from Wind Lake and Waterford North — beyond Waterford 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
$159M
Potential roof exposure — 13,225 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Close just 0.5% of the 13,225 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
April 2028
Claims from this storm can typically be filed until around April 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 $2,777 on top of the $150 plan.
Waterford hail history
Estimated-size surface 
Estimated-size surface 
Estimated-size surface 
NEXRAD surface Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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