Hail in Rockwell City · Sep 18, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Rockwell City that day. Open it on the live map to see the swath over the streets.
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Convective day · Sep 18, 2026 · noon–noon UTC
Severity
The 7th most severe storm Rockwell City 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
- 38 /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 Rockwell City 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 Sep 18, 2026 — this storm produced no NEXRAD point detections over Rockwell City, so there is one map to show, not two.
The storm in context
Where Sep 18, 2026 sits in Rockwell City's hail record.
This was Rockwell City's 7th recorded hail day, arriving 72 days after the Jul 8, 2026 storm. By severity it ranks 7th of the 7 storms we have logged here. Radar put the day's largest stone over Rockwell City at 0.5" — radar-estimated size aloft.
The Sep 18, 2026 convective day was bigger than Rockwell City: the same system put hail over 157 other tracked cities, 3 of them in Iowa. Nearest: Wall Lake (29 miles west, up to 0.5"); Odebolt (34 miles west, up to 0.5"); Schleswig (50 miles west, up to 0.75").
These maps are stills. In the app this date is one of 7 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
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 Rockwell City 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.
Below the severe threshold
What 0.5" hail means for Rockwell City 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
$972K
Potential roof exposure — 81 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
September 2028
Claims from this storm can typically be filed until around September 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 $17 on top of the $150 plan.
Rockwell City hail history
Other storms in Rockwell City.
Estimated-size surface Jul 8, 2026
1"
Estimated-size surface Jul 2, 2026
1.75"
Estimated-size surface Jun 16, 2026
1"
Estimated-size surface May 17, 2026
1"
Estimated-size surface May 15, 2026
2.25"
Estimated-size surface Apr 23, 2026
2.5"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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