Hail in Marble Rock · May 15, 2026
NEXRAD logged 0 hail signatures up to 1.75"; the estimated-size surface reached 1.25" aloft. Open it on the live map to see the swath over the streets.
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Convective day · May 15, 2026 · noon–noon UTC
Severity
The most severe storm Marble Rock 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
- 44 /100
- Homes exposed
- 65 /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 Marble Rock saw the hail — from two instruments
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
Where May 15, 2026 sits in Marble Rock's hail record.
This was Marble Rock's 2nd recorded hail day, arriving 28 days after the Apr 17, 2026 storm. By severity it ranks 1st of the 6 storms we have logged here. Radar put the day's largest stone over Marble Rock at 1.75" — the largest NEXRAD radar signature.
The May 15, 2026 convective day was bigger than Marble Rock: the same system put hail over 444 other tracked cities, 236 of them in Iowa. Nearest: Greene (10 miles southeast, up to 0.5"); Charles City (10 miles northeast, up to 0"); Rockford (11 miles west, up to 1.75").
These maps are stills. In the app this date is one of 6 Marble Rock 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.
The National Weather Service logged no spotter reports for this storm over Marble Rock. That absence is ordinary — filing a report takes a person on the spot who saw the hail and phoned it in. What stands as the record for this date is the radar above, which caught the storm regardless.
High damage potential
What 1.75" hail means for Marble Rock roofs.
Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$23M
Potential roof exposure — 1,875 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 9 jobs
- Illustrative work
- ~$135K
Close just 0.5% of the 1,875 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 $394 on top of the $150 plan.
Marble Rock hail history
Other storms in Marble Rock.
Estimated-size surface Aug 7, 2026
1"
Estimated-size surface Jul 20, 2026
0.5"
Estimated-size surface Jul 8, 2026
1.75"
Estimated-size surface Jul 2, 2026
1"
Estimated-size surface Apr 17, 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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