NEXRAD logged 32 hail signatures up to 2.5"; the estimated-size surface reached 1.25" aloft. At 2.5" — baseball — this is a severe hail signal associated with roof damage. 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 18, 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 Peru's 6th recorded hail day, arriving 1 day after the May 17, 2026 storm. By severity it ranks 1st of the 10 storms we have logged here. Radar put the day's largest stone over Peru at 2.5" — the largest NEXRAD radar signature.
The May 18, 2026 convective day was bigger than Peru: the same system put hail over 726 other tracked cities, 121 of them in Nebraska. Nearest: Watson (5 miles east, up to 2.5"); Brownville (7 miles south, up to 2.5"); Auburn (10 miles southwest, up to 2.5").
These maps are stills. In the app this date is one of 10 Peru 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.
“Video from broadcast media showed a small... rain-wrapped tornado moving generally eastward just south of Road 733A and Highway 75. Damage consisted of a small cluster (OAX)”
— NOAA / SPC storm report
“Public report of golf ball size hail north of Auburn. Location and time are estimated from radar. (OAX)”
— NOAA / SPC storm report
“Personal Weather Station. (OAX)”
— 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 18 minutes, from to .
Reports came from Julian — beyond Peru itself.
Severe hail signal
Two-inch-plus hail is capable of puncturing shingles, breaking skylights or windows, and heavily denting soft materials. The strongest radar bands warrant prompt inspection, but neither the signal nor the footprint confirms damage at a specific address.
Radar reading · not confirmed damage
Roofing exposure
Potential roof exposure
$8.1M
Potential roof exposure — 677 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Close just 0.5% of the 677 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
May 2028
Claims from this storm can typically be filed until around May 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 $142 on top of the $150 plan.
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NEXRAD surface 
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NEXRAD 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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Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.