Tornado Rating unknown
2 S Diller Jefferson County
“Chaser stream of a brief cone tornado. (OAX)”
— NOAA / SPC storm report
Hail in Diller May 18, 2026
Both radar surfaces caught this storm: NEXRAD logged 54 hail signatures up to 2.75", and the radar-estimated size reached 1.5" aloft. At 2.75" — 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.
Largest hailstone
2.75"
≈ baseball · the largest NEXRAD radar signature Homes in the hail footprint
589
Ground reports
3
3 tornadoThe most severe storm Diller has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
7.0 /10
- Hail size
- 69 /100
- Homes exposed
- 55 /100
- Ground truth
- 100 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Diller saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
NEXRAD radar signatures
NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Max size
2.75"
Detections
54
Radar-estimated hail size
Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
Max size
1.5"
Where May 18, 2026 sits in Diller's hail record
This was Diller'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 Diller at 2.75" — the largest NEXRAD radar signature.
The May 18, 2026 convective day was bigger than Diller: the same system put hail over 726 other tracked cities, 121 of them in Nebraska. Nearest: Hollenberg (7 miles south, up to 2.75"); Odell (8 miles east, up to 2.5"); Jansen (11 miles northwest, up to 3.75").
These maps are stills from Diller's May 18, 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.
What people on the ground reported
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.
Tornado reports
3 reports Tornado Rating unknown
3 NW Odell Gage County
“Wynmore fire dept. reports tornado on the ground near Odell. (OAX)”
— NOAA / SPC storm report
Tornado Rating unknown
5 S Diller Jefferson County
“Storm chaser video showed a brief tornado that began just south of State Highway 8... approximately 4.5 miles south-southeast of Diller. It continued northeast... cross (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.
How the storm moved
Hail was reported over 12 minutes, from to .
Reports came from Odell — beyond Diller itself.
What 2.75" hail means for Diller roofs
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.
What this storm is worth to a roofer
$7.1M
Potential roof exposure — 589 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Illustrative jobs
3 jobs
Illustrative work
~$45K
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.
Track hail over Diller on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Diller storm history — this May 18, 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
Diller hail history
← All hail in Diller 10 recorded storm days in Diller, NE
Other storms in Diller
Jul 8, 2026
1" Signatures 1"
No ground reports filed 
Jul 3, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed 
Jun 20, 2026
2" Estimated 2"
No ground reports filed 
Jun 5, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed 
May 17, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed 
Apr 23, 2026
2.5" Signatures 2.5" Estimated 1.25"
No ground reports filed 
Apr 11, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed 
Apr 9, 2026
0.75" Signatures 0.75"
No ground reports filed 
Mar 5, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed
A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar surfaces are detections and estimates,
not confirmed damage. Last updated Aug 2, 2026.