/ Storm field report · Pottawattamie

Hail in Griswold · Jun 5, 2026

NEXRAD logged 0 hail signatures up to 1.75"; the estimated-size surface reached 1.25" aloft. Open it on the live map to see the swath over the streets.

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Peak hail signal 1.75" ≈ golf ball · the largest NEXRAD radar signature

Homes in the hail footprint 2,726

Ground reports 2 2 wind

Radar surfaces 2 NEXRAD + estimated size

Convective day · Jun 5, 2026 · noon–noon UTC

Severity

The 2nd most severe storm Griswold has seen in the last 12 months

Composite score · 4.8 / 10

Storm severity score

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

4.8 /10

Peak hail signal: 44 /100
Homes exposed: 69 /100
Ground truth: 33 /100

Evidence / storm surfaces

How Griswold saw the hail — from two instruments

Jun 5, 2026 · Griswold, IA

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.

NEXRAD radar-signature map of the hail storm over Griswold, IA on Jun 5, 2026 — NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.

Max size 1.75" Detections 0

Radar-estimated hail-size map of the storm over Griswold, IA on Jun 5, 2026 — 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.

Max size 1.25"

The storm in context

Where Jun 5, 2026 sits in Griswold's hail record.

This was Griswold's 9th recorded hail day, arriving 5 days after the May 31, 2026 storm. By severity it ranks 2nd of the 15 storms we have logged here. Radar put the day's largest stone over Griswold at 1.75" — the largest NEXRAD radar signature.

The Jun 5, 2026 convective day was bigger than Griswold: the same system put hail over 440 other tracked cities, 66 of them in Iowa. Nearest: Elliott (7 miles south, up to 1"); Emerson (10 miles southwest, up to 1.75"); Cumberland (13 miles east, up to 2.5").

These maps are stills. In the app this date is one of 15 Griswold 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

2 reports 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

2 reports

Wind gust 59 mph

7 SE Griswold Cass County

4:10 AM UTC

“Measured from personal weather station. (DMX)”
— NOAA / SPC storm report

Wind gust 65 mph

Griswold Cass County

4:01 AM UTC

“Measured from personal weather station. (DMX)”
— NOAA / SPC storm report

High damage potential

What 1.75" hail means for Griswold 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.

2,726 homes × $12,000 avg. claim

Potential roof exposure

$33M

Potential roof exposure — 2,726 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs: 14 jobs
Illustrative work: ~$210K

Close just 0.5% of the 2,726 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

June 2028

Claims from this storm can typically be filed until around June 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 $572 on top of the $150 plan.

Griswold hail history

15 recorded storm days in Griswold, IA

← All hail in Griswold

Map unavailable

NEXRAD surface

Storm date Griswold / IA

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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 15, 2026.

The 2nd most severe storm Griswold has seen in the last 12 months

How Griswold saw the hail — from two instruments

Where Jun 5, 2026 sits in Griswold's hail record.

What people on the ground reported

Wind reports

What 1.75" hail means for Griswold roofs.

What this storm is worth to a roofer.

Other storms in Griswold.

Sep 14, 2026

Sep 6, 2026

Aug 8, 2026

Aug 4, 2026

Jul 20, 2026

Jun 6, 2026

May 31, 2026

May 18, 2026

May 17, 2026

May 16, 2026

Apr 23, 2026

Apr 9, 2026

Mar 6, 2026

Mar 5, 2026

The next storm won’t wait for you.