NEXRAD caught this storm: 0 hail signatures up to 1". The radar-estimated size surface had no signal to model this day.
A tornado was also reported to the National Weather Service during this storm — see the ground reports below.
1"
≈ quarter · the largest NEXRAD radar signature0
1
1 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.
Only the NEXRAD radar-signature surface resolved for May 15, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
This was Shullsburg's 3rd recorded hail day, arriving 28 days after the Apr 17, 2026 storm. By severity it ranks 4th of the 5 storms we have logged here. Radar put the day's largest stone over Shullsburg at 1" — the largest NEXRAD radar signature.
The May 15, 2026 convective day was bigger than Shullsburg: the same system put hail over 444 other tracked cities, 43 of them in Wisconsin. Nearest: Darlington (10 miles northeast, up to 0"); Cuba City (13 miles west, up to 1"); Potosi (26 miles west, up to 1").
These maps are stills from Shullsburg's May 15, 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.
“EF-0... Est. Peak Winds-85mph. Tornado appeared to start near Penny Benton Rd and County Road I... where six trees were either uprooted... had limbs topped. One tree wa (MKX)”
— NOAA / SPC storm report
Reports came from Benton — beyond Shullsburg itself.
Quarter-size and larger hail is where asphalt shingle damage starts in earnest: bruised mats and granule loss that homeowners can't see from the ground. Most people inside the footprint won't know their roof was hit until someone inspects it.
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Shullsburg storm history — this May 15, 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
5 recorded storm days in Shullsburg, WI
Jun 24, 2026
0.75"
Jun 10, 2026
0.5"
Apr 17, 2026
1.25"
Mar 31, 2026
0.75"