/ Storm field report · Clayton

Hail in Guttenberg · Jul 2, 2026

NEXRAD logged 28 hail signatures up to 2.75"; the estimated-size surface reached 1.75" aloft. At 2.75" — baseball — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.

7-day free trial in the iPhone app. No card required to start.

For iPhone. Android coming soon.

Open this storm on the live map → Start free trial

Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.

Peak hail signal 2.75" ≈ baseball · the largest NEXRAD radar signature

Homes in the hail footprint 776

Ground reports 4 3 hail · 1 wind

Radar surfaces 2 NEXRAD + estimated size

Convective day · Jul 2, 2026 · noon–noon UTC

Severity

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

Composite score · 6.6 / 10

Storm severity score

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

6.6 /10

Peak hail signal: 69 /100
Homes exposed: 58 /100
Ground truth: 67 /100

Evidence / storm surfaces

How Guttenberg saw the hail — from two instruments

Jul 2, 2026 · Guttenberg, IA

We map this storm two ways: the NEXRAD radar signatures the storm produced overhead, and the radar-estimated size of the hail in the air. The two surfaces don’t have to match — where they diverge is where estimated size aloft ran ahead of, or behind, what the signatures caught.

NEXRAD radar-signature map of the hail storm over Guttenberg, IA on Jul 2, 2026 — NEXRAD radar signatures — the point detections the storm produced overhead. A signature is where the radar saw hail, not a confirmed stone on the ground.

Max size 2.75" Detections 28

Radar-estimated hail-size map of the storm over Guttenberg, IA on Jul 2, 2026 — Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.

Max size 1.75"

The storm in context

Where Jul 2, 2026 sits in Guttenberg's hail record.

This was Guttenberg's 3rd recorded hail day, arriving 48 days after the May 15, 2026 storm. By severity it ranks 1st of the 5 storms we have logged here. Radar put the day's largest stone over Guttenberg at 2.75" — the largest NEXRAD radar signature.

The Jul 2, 2026 convective day was bigger than Guttenberg: the same system put hail over 1,147 other tracked cities, 245 of them in Iowa. Nearest: Garber (5 miles west, up to 2.25"); Colesburg (7 miles south, up to 2.75"); Garnavillo (7 miles north, up to 2.25").

These maps are stills. In the app this date is one of 5 Guttenberg 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

4 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.

Hail reports

3 reports

Hail size 2"

4 SSE Glen Haven Grant County

8:08 PM UTC

“(ARX)”
— NOAA / SPC storm report

Hail size 1"

Guttenberg Clayton County

8:00 PM UTC

“(ARX)”
— NOAA / SPC storm report

Hail size 1"

Guttenberg Clayton County

7:56 PM UTC

“Picture relayed via the public. Time estimated via radar. (ARX)”
— NOAA / SPC storm report

Wind reports

1 report

Wind gust 60 mph

2 SE Glen Haven Grant County

9:08 PM UTC

“Relayed by Emergency Management. (ARX)”
— 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.

Hail was reported over 72 minutes, from 7:56 PM UTC to 9:08 PM UTC .

Reports came from Glen Haven — beyond Guttenberg itself.

Severe hail signal

What 2.75" hail means for Guttenberg 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.

776 homes × $12,000 avg. claim

Potential roof exposure

$9.3M

Potential roof exposure — 776 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs: 4 jobs
Illustrative work: ~$60K

Close just 0.5% of the 776 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

July 2028

Claims from this storm can typically be filed until around July 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 $163 on top of the $150 plan.

Guttenberg hail history

5 recorded storm days in Guttenberg, IA

← All hail in Guttenberg

Radar-estimated hail-size map of the storm over Guttenberg, IA on Aug 21, 2026

Estimated-size surface

Storm date Guttenberg / IA

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.