Hail size 1"
2 N Atlantic Cass County
“Pea to quarter sized hail north of Atlantic. Time estimated from radar. (DMX)”
— NOAA / SPC storm report
/ Storm field report · Cass
Hail in Atlantic · Sep 6, 2026
Hit 6 days ago
The estimated-size surface reached 1" aloft; NEXRAD logged no point detections over Atlantic that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 1" ≈ quarter · radar-estimated size aloft
Homes in the hail footprint 4,080
Ground reports 1 1 hail
Radar surfaces 1 Estimated size only
Convective day · Sep 6, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Atlantic has seen in the last 12 months
Composite score · 3.6 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.6 /10
- Peak hail signal
- 25 /100
- Homes exposed
- 72 /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 Atlantic saw the hail — from two instruments
Sep 6, 2026 · Atlantic, IA
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
Radar-estimated hail size Surface resolved
Estimated size field The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Max size
1"
Only the radar-estimated size surface resolved for Sep 6, 2026 — this storm produced no NEXRAD point detections over Atlantic, so there is one map to show, not two.
The storm in context
Where Sep 6, 2026 sits in Atlantic's hail record.
This was Atlantic's 10th recorded hail day, arriving 24 days after the Aug 13, 2026 storm. By severity it ranks 2nd of the 10 storms we have logged here. Radar put the day's largest stone over Atlantic at 1" — radar-estimated size aloft.
The Sep 6, 2026 convective day was bigger than Atlantic: the same system put hail over 608 other tracked cities, 72 of them in Iowa. Nearest: Wiota (6 miles southeast, up to 0.75"); Lewis (12 miles southwest, up to 1"); Exira (15 miles northeast, up to 1").
These maps are stills. In the app this date is one of 10 Atlantic 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 reportDamage-capable hail signal
What 1" hail means for Atlantic 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.
4,080 homes × $12,000 avg. claim
Potential roof exposure
$49M
Potential roof exposure — 4,080 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 20 jobs
- Illustrative work
- ~$300K
Close just 0.5% of the 4,080 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
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 $857 on top of the $150 plan.
Atlantic hail history
Other storms in Atlantic.
10 recorded storm days in Atlantic, IA
Estimated-size surface Storm date Atlantic / IA
Aug 13, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Atlantic / IA
Jul 27, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Atlantic / IA
Jul 20, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Atlantic / IA
Jul 4, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Atlantic / IA
Jun 5, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Atlantic / IA
May 15, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Atlantic / IA
Apr 23, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Atlantic / IA
Mar 30, 2026
2.5" Signatures 2.5" Estimated 1.5"
1 ground report Open report →
Estimated-size surface Storm date Atlantic / IA
Mar 5, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Take your next area into the field.
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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 Sep 7, 2026.