Both radar surfaces caught this storm: NEXRAD logged 21 hail signatures up to 3.75", and the radar-estimated size reached 2.25" aloft. At 3.75" — baseball — this is severe, roof-replacing hail: close to every roof inside the footprint becomes a claim candidate.
A tornado was also reported to the National Weather Service during this storm — see the ground reports below.
3.75"
≈ baseball · the largest NEXRAD radar signature59
6
3 hail · 3 tornadoOverview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
We map this storm two ways: the NEXRAD radar signatures the storm produced overhead, and the radar-estimated size of the hail in the air. The two surfaces don’t have to match — where they diverge is where estimated size aloft ran ahead of, or behind, what the signatures caught.
NEXRAD radar signatures — the point detections the storm produced overhead. A signature is where the radar saw hail, not a confirmed stone on the ground.
Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
This was Winner's 2nd recorded hail day, arriving 1 day after the Jun 2, 2026 storm. By severity it ranks 1st of the 11 storms we have logged here. Radar put the day's largest stone over Winner at 3.75" — the largest NEXRAD radar signature.
The Jun 3, 2026 convective day was bigger than Winner: the same system put hail over 274 other tracked cities, 69 of them in South Dakota. Nearest: Colome (18 miles east, up to 1.75"); Dallas (30 miles east, up to 1"); Wood Lake (34 miles south, up to 1").
These maps are stills from Winner's Jun 3, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
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.
“EF1 tornado estimated peak wind of 100mph... path length 10.33 miles... 436 yards wide... start time: 0700PM CDT... end time: 0724PM CDT. Tornado wasn't on the ground c (UNR)”
— NOAA / SPC storm report
“Tornado on the ground from at least 720 PM to 725 PM CDT per multiple reports and videos from storm chasers. (UNR)”
— NOAA / SPC storm report
“Multiple storm chaser reports of a tornado. Photo and location submitted via social media. (UNR)”
— NOAA / SPC storm report
“(UNR)”
— NOAA / SPC storm report
“Along 266th St on the edge of the hail core. (UNR)”
— NOAA / SPC storm report
“Time estimated. Chaser was still on edge of hail core. (UNR)”
— NOAA / SPC storm report
Hail was reported over 20 minutes, from to .
Reports came from Witten, Ideal, and Hamill — beyond Winner itself.
Two-inch-plus hail punctures shingles, breaks skylights and windows, and dents anything soft. In the core of a footprint like this, close to every roof is a candidate for an insurance claim. Speed decides who writes those jobs.
$708K
Potential roof exposure — 59 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.Radar updates in real time, spotter reports appear on the map as they're filed, and the full Winner storm history — this Jun 3, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
11 recorded storm days in Winner, SD
Jul 30, 2026
1.25"
Jul 29, 2026
1"
Jul 25, 2026
1.25"
Jul 19, 2026
0.75"
Jul 6, 2026
3.25"
Jul 2, 2026
1"
Jun 30, 2026
1"
Jun 27, 2026
1.75"
Jun 4, 2026
2.5"
Jun 2, 2026
1"