/ Storm field report · Warren

Hail in Norwalk · Sep 8, 2026

Hit 4 days ago

The estimated-size surface reached 1.5" aloft; NEXRAD logged no point detections over Norwalk that day. Open it on the live map to see the swath over the streets.

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Peak hail signal 1.5" ≈ ping-pong ball · radar-estimated size aloft

Homes in the hail footprint 25,686

Ground reports 1 1 wind

Radar surfaces 1 Estimated size only

Convective day · Sep 8, 2026 · noon–noon UTC

Severity

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

Composite score · 4.7 / 10

Storm severity score

Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.

4.7 /10

Peak hail signal: 38 /100
Homes exposed: 88 /100
Ground truth: 17 /100

Evidence / storm surfaces

How Norwalk saw the hail — from two instruments

Sep 8, 2026 · Norwalk, 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 map of the storm over Norwalk, IA on Sep 8, 2026 — 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 1.5"

Only the radar-estimated size surface resolved for Sep 8, 2026 — this storm produced no NEXRAD point detections over Norwalk, so there is one map to show, not two.

The storm in context

Where Sep 8, 2026 sits in Norwalk's hail record.

This was Norwalk's 10th recorded hail day, arriving 26 days after the Aug 13, 2026 storm. By severity it ranks 1st of the 10 storms we have logged here. Radar put the day's largest stone over Norwalk at 1.5" — radar-estimated size aloft.

The Sep 8, 2026 convective day was bigger than Norwalk: the same system put hail over 62 other tracked cities, 35 of them in Iowa. Nearest: Des Moines (7 miles north, up to 1.75"); Carlisle (8 miles east, up to 1.5"); Pleasant Hill (9 miles northeast, up to 1.75").

These maps are stills. In the app this date is one of 10 Norwalk 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.

Wind reports

1 report

Wind gust 66 mph

Des Moines Int Airport Polk County

11:17 PM 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 Des Moines Int Airport — beyond Norwalk itself.

High damage potential

What 1.5" hail means for Norwalk 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.

25,686 homes × $12,000 avg. claim

Potential roof exposure

$308M

Potential roof exposure — 25,686 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs: 128 jobs
Illustrative work: ~$1.9M

Close just 0.5% of the 25,686 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 $5,394 on top of the $150 plan.

Norwalk hail history

10 recorded storm days in Norwalk, IA

← All hail in Norwalk

Radar-estimated hail-size map of the storm over Norwalk, IA on Aug 13, 2026

Estimated-size surface

Storm date Norwalk / IA

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See the hail, review your recommendations, and canvass with Overview on iPhone.

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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 9, 2026.

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

How Norwalk saw the hail — from two instruments

Where Sep 8, 2026 sits in Norwalk's hail record.

What people on the ground reported

Wind reports

How the storm moved

What 1.5" hail means for Norwalk roofs.

What this storm is worth to a roofer.

Other storms in Norwalk.

Aug 13, 2026

Jul 27, 2026

Jul 20, 2026

Jul 3, 2026

Jul 2, 2026

Jun 10, 2026

May 15, 2026

Apr 17, 2026

Mar 6, 2026

Take your next area into the field.