NEXRAD logged 0 hail signatures up to 1"; the estimated-size surface had no signal that day. 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 · May 15, 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
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.
Radar signature field 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.
The storm in context
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: Cuba City (13 miles west, up to 1"); Darlington (14 miles northeast, up to 0"); Potosi (26 miles west, up to 1").
These maps are stills. In the app this date is one of 5 Shullsburg 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.
“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
Storm forensics
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Reports came from Benton — beyond Shullsburg itself.
Damage-capable hail signal
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Shullsburg 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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