/ Storm field report · Cass

Hail in Atlantic · Mar 30, 2026

NEXRAD logged 0 hail signatures up to 2.5"; the estimated-size surface reached 1.5" 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 1,066

Ground reports 1 1 hail

Radar surfaces 2 NEXRAD + estimated size

Convective day · Mar 30, 2026 · noon–noon UTC

Severity

The most severe storm Atlantic 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: 61 /100
Ground truth: 17 /100

Evidence / storm surfaces

How Atlantic saw the hail — from two instruments

Mar 30, 2026 · Atlantic, IA

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.

NEXRAD radar-signature map of the hail storm over Atlantic, IA on Mar 30, 2026 — 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.

Max size 2.5" Detections 0

Radar-estimated hail-size map of the storm over Atlantic, IA on Mar 30, 2026 — 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.

Max size 1.5"

The storm in context

Where Mar 30, 2026 sits in Atlantic's hail record.

This was Atlantic's 2nd recorded hail day, arriving 25 days after the Mar 5, 2026 storm. By severity it ranks 1st of the 10 storms we have logged here. Radar put the day's largest stone over Atlantic at 2.5" — the largest NEXRAD radar signature.

The Mar 30, 2026 convective day was bigger than Atlantic: the same system put hail over 313 other tracked cities, 78 of them in Iowa. Nearest: Marne (6 miles northwest, up to 1"); Anita (11 miles east, up to 2.5"); Exira (15 miles northeast, up to 2.5").

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 report

Hail size 1"

6 ENE Marne Cass County

1:41 AM UTC

“(DMX)”
— NOAA / SPC storm report

Storm forensics

How the storm moved

Timing and place names from NOAA ground reports

Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.

Reports came from Marne — beyond Atlantic itself.

Severe hail signal

What 2.5" hail means for Atlantic 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.

1,066 homes × $12,000 avg. claim

Potential roof exposure

$13M

Potential roof exposure — 1,066 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 1,066 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

March 2028

Claims from this storm can typically be filed until around March 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 $224 on top of the $150 plan.

Atlantic hail history

10 recorded storm days in Atlantic, IA

← All hail in Atlantic

Radar-estimated hail-size map of the storm over Atlantic, IA on Sep 6, 2026

Estimated-size surface

Storm date Atlantic / IA

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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 Sep 7, 2026.

The most severe storm Atlantic has seen in the last 12 months

How Atlantic saw the hail — from two instruments

Where Mar 30, 2026 sits in Atlantic's hail record.

What people on the ground reported

Hail reports

How the storm moved

What 2.5" hail means for Atlantic roofs.

What this storm is worth to a roofer.

Other storms in Atlantic.

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Apr 23, 2026

Mar 5, 2026

The next storm won’t wait for you.