Hail size 1"
2 SSW Denison Crawford County
“(DMX)”
— NOAA / SPC storm report
Hail in Denison Apr 23, 2026
Both radar surfaces caught this storm: NEXRAD logged 24 hail signatures up to 2", and the radar-estimated size reached 1" aloft. At 2" — tennis ball — this is severe, roof-replacing hail: close to every roof inside the footprint becomes a claim candidate.
Largest hailstone
2"
≈ tennis ball · the largest NEXRAD radar signature Homes in the hail footprint
611
Ground reports
1
1 hailThe 2nd most severe storm Denison 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.
4.6 /10
- Hail size
- 50 /100
- Homes exposed
- 56 /100
- Ground truth
- 17 /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 Denison saw the hail — from two instruments
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
NEXRAD radar signatures
Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
Max size
2"
Detections
24
Radar-estimated hail size
The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Max size
1"
Where Apr 23, 2026 sits in Denison's hail record
This was Denison's 2nd recorded hail day, arriving 8 days after the Apr 15, 2026 storm. By severity it ranks 2nd of the 5 storms we have logged here. Radar put the day's largest stone over Denison at 2" — the largest NEXRAD radar signature.
The Apr 23, 2026 convective day was bigger than Denison: the same system put hail over 703 other tracked cities, 252 of them in Iowa. Nearest: Deloit (6 miles northeast, up to 1.75"); Dow City (7 miles south, up to 2.5"); Charter Oak (8 miles west, up to 2.5").
These maps are stills from Denison's Apr 23, 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.
Hail reports
1 reportWhat 2" hail means for Denison 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
$7.3M
Potential roof exposure — 611 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 April 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Track hail over Denison on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Denison storm history — this Apr 23, 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
Denison hail history
← All hail in Denison 5 recorded storm days in Denison, IA
Other storms in Denison
Jul 8, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed 
May 17, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed 
May 15, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed 
Apr 15, 2026
2.5" Estimated 2.5"
3
ground reports
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 3, 2026.