Hail in Diagonal · Apr 15, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Diagonal that day. Open it on the live map to see the swath over the streets.
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Convective day · Apr 15, 2026 · noon–noon UTC
Severity
The 8th most severe storm Diagonal has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 13 /100
- Homes exposed
- 37 /100
- Ground truth
- 0 /100
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
How Diagonal saw the hail — from two instruments
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.
Estimated size field Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
Only the radar-estimated size surface resolved for Apr 15, 2026 — this storm produced no NEXRAD point detections over Diagonal, so there is one map to show, not two.
The storm in context
Where Apr 15, 2026 sits in Diagonal's hail record.
This was Diagonal's 2nd recorded hail day, arriving 12 days after the Apr 3, 2026 storm. By severity it ranks 8th of the 10 storms we have logged here. Radar put the day's largest stone over Diagonal at 0.5" — radar-estimated size aloft.
The Apr 15, 2026 convective day was bigger than Diagonal: the same system put hail over 425 other tracked cities, 127 of them in Iowa. Nearest: Benton (7 miles south, up to 0.5"); Mount Ayr (11 miles east, up to 1"); Lenox (13 miles northwest, up to 0.75").
These maps are stills. In the app this date is one of 10 Diagonal 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
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.
No ground reports were filed with the National Weather Service for this storm over Diagonal. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Below the severe threshold
What 0.5" hail means for Diagonal roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$828K
Potential roof exposure — 69 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
April 2028
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.
Names and phones for every home in the footprint: at most $14 on top of the $150 plan.
Diagonal hail history
Other storms in Diagonal.
Estimated-size surface Sep 6, 2026
1.5"
Estimated-size surface Aug 4, 2026
0.75"
Estimated-size surface Jul 20, 2026
Estimated-size surface Jun 11, 2026
1.25"
Estimated-size surface Jun 10, 2026
2.5"
NEXRAD surface Jun 5, 2026
Estimated-size surface May 18, 2026
1.25"
Estimated-size surface May 16, 2026
2.25"
Estimated-size surface Apr 3, 2026
1"The next storm won’t wait for you.
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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