/ Storm field report · Sioux

Hail in Granville · Jul 1, 2026

NEXRAD logged 2 hail signatures up to 0.75"; the estimated-size surface had no signal that day. Open it on the live map to see the swath over the streets.

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Peak hail signal 0.75" ≈ penny to nickel · the largest NEXRAD radar signature
Homes in the hail footprint 66
Ground reports 0 none filed
Radar surfaces 1 NEXRAD only

Convective day · Jul 1, 2026 · noon–noon UTC

Severity

The 7th most severe storm Granville has seen in the last 12 months

Composite score · 2.0 / 10
Storm severity score

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

2.0 /10
Peak hail signal
19 /100

Largest radar-indicated size — a signal of damage potential, not confirmation.

Homes exposed
37 /100

How many homes sit inside the storm's footprint.

Ground truth
0 /100

Independent storm reports filed with the NWS.

Evidence / storm surfaces

How Granville saw the hail — from two instruments

Jul 1, 2026 · Granville, 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.

NEXRAD radar signatures Surface resolved
NEXRAD radar-signature map of the hail storm over Granville, IA on Jul 1, 2026 Radar signature field

Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.

Max size 0.75" Detections 2

Only the NEXRAD radar-signature surface resolved for Jul 1, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.

The storm in context

Where Jul 1, 2026 sits in Granville's hail record.

This was Granville's 6th recorded hail day, arriving 1 day after the Jun 30, 2026 storm. By severity it ranks 7th of the 8 storms we have logged here. Radar put the day's largest stone over Granville at 0.75" — the largest NEXRAD radar signature.

The Jul 1, 2026 convective day was bigger than Granville: the same system put hail over 1,147 other tracked cities, 86 of them in Iowa. Nearest: Remsen (7 miles south, up to 1.5"); Sheldon (14 miles north, up to 1.75"); Primghar (15 miles east, up to 1.5").

These maps are stills. In the app this date is one of 8 Granville 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

No 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.

For this storm over Granville, the NWS report log is empty — a common outcome, since ground reports only happen when someone witnesses the hail and takes the time to call it in. The detection record for the date lives in the radar maps above.

Near the severe threshold

What 0.75" hail means for Granville roofs.

A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.

Radar reading · not confirmed damage

Roofing exposure

What this storm is worth to a roofer.

66 homes × $12,000 avg. claim

Potential roof exposure

$792K

Potential roof exposure — 66 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

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 $14 on top of the $150 plan.

Granville hail history

8 recorded storm days in Granville, 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 6, 2026.