Hail size 1"
1 E Rockwell City Calhoun County
“(DMX)”
— NOAA / SPC storm report
/ Storm field report · Calhoun
Hail in Rockwell City · Apr 23, 2026
NEXRAD logged 20 hail signatures up to 2.5"; the estimated-size surface reached 1" aloft. At 2.5" — baseball — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.
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Peak hail signal 2.5" ≈ baseball · the largest NEXRAD radar signature
Homes in the hail footprint 918
Ground reports 1 1 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Apr 23, 2026 · noon–noon UTC
Severity
The most severe storm Rockwell City has seen in the last 12 months
Composite score · 5.5 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.5 /10
- Peak hail signal
- 63 /100
- Homes exposed
- 59 /100
- Ground truth
- 17 /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 Rockwell City saw the hail — from two instruments
Apr 23, 2026 · Rockwell City, IA
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.
NEXRAD radar signatures Surface resolved
Radar signature field NEXRAD radar signatures — the point detections the storm produced overhead. A signature is where the radar saw hail, not a confirmed stone on the ground.
Max size
2.5"
Detections
20
Radar-estimated hail size Surface resolved
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.
Max size
1"
The storm in context
Where Apr 23, 2026 sits in Rockwell City's hail record.
This was Rockwell City's 1st recorded hail day — the first hail day in our records for the city. By severity it ranks 1st of the 6 storms we have logged here. Radar put the day's largest stone over Rockwell City at 2.5" — the largest NEXRAD radar signature.
The Apr 23, 2026 convective day was bigger than Rockwell City: the same system put hail over 703 other tracked cities, 252 of them in Iowa. Nearest: Lohrville (9 miles southeast, up to 2.5"); Somers (13 miles east, up to 1.5"); Lake City (14 miles south, up to 2.5").
These maps are stills. In the app this date is one of 6 Rockwell City 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
1 report filed with the NWS
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 reportSevere hail signal
What 2.5" hail means for Rockwell City roofs.
Two-inch-plus hail is capable of puncturing shingles, breaking skylights or windows, and heavily denting soft materials. The strongest radar bands warrant prompt inspection, but neither the signal nor the footprint confirms damage at a specific address.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
918 homes × $12,000 avg. claim
Potential roof exposure
$11M
Potential roof exposure — 918 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 5 jobs
- Illustrative work
- ~$75K
Close just 0.5% of the 918 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 $193 on top of the $150 plan.
Rockwell City hail history
Other storms in Rockwell City.
6 recorded storm days in Rockwell City, IA
Estimated-size surface Storm date Rockwell City / IA
Jul 8, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Rockwell City / IA
Jul 2, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Rockwell City / IA
Jun 16, 2026
1" Estimated 1"
1 ground report Open report →
Estimated-size surface Storm date Rockwell City / IA
May 17, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Rockwell City / IA
May 15, 2026
2.25" Signatures 2.25" Estimated 1.25"
No ground reports filed Open report →
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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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 tells you where to look. Only an inspection confirms damage at an address. Last updated Aug 3, 2026.