Hail in Grand River · Apr 15, 2026
The estimated-size surface reached 1" aloft; NEXRAD logged no point detections over Grand River 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 2nd most severe storm Grand River 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
- 25 /100
- Homes exposed
- 57 /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 Grand River 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.
Estimated size field 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.
Only the radar-estimated size surface resolved for Apr 15, 2026 — this storm produced no NEXRAD point detections over Grand River, so there is one map to show, not two.
The storm in context
Where Apr 15, 2026 sits in Grand River's hail record.
This was Grand River's 3rd recorded hail day, arriving 12 days after the Apr 3, 2026 storm. By severity it ranks 2nd of the 8 storms we have logged here. Radar put the day's largest stone over Grand River at 1" — radar-estimated size aloft.
The Apr 15, 2026 convective day was bigger than Grand River: the same system put hail over 425 other tracked cities, 127 of them in Iowa. Nearest: Ellston (5 miles west, up to 1"); Osceola (10 miles northeast, up to 0.75"); Weldon (10 miles east, up to 0.75").
These maps are stills. In the app this date is one of 8 Grand River 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.
Nobody on the ground filed a report over Grand River for this date, which says more about who was watching than about the storm: spotter reports only exist where there is an observer. The radar surfaces above carry the evidence for this one.
Damage-capable hail signal
What 1" hail means for Grand River roofs.
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
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$8.3M
Potential roof exposure — 690 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 3 jobs
- Illustrative work
- ~$45K
Close just 0.5% of the 690 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
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 $145 on top of the $150 plan.
Grand River hail history
Other storms in Grand River.
Estimated-size surface Aug 4, 2026
0.5"
Estimated-size surface Jun 11, 2026
2.75"
Estimated-size surface Jun 10, 2026
0.75"
Estimated-size surface May 18, 2026
0.5"
Estimated-size surface Apr 23, 2026
Estimated-size surface Apr 3, 2026
1"
Estimated-size surface Mar 5, 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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