Tornado Rating unknown
3 SE Greenville Clay County
“Brief touchdown witnessed by Sheriffs deputy. (FSD)”
— NOAA / SPC storm report
/ Storm field report · Clay
Hail in Greenville · Jul 4, 2026
NEXRAD logged 1 hail signature up to 0.75"; the estimated-size surface reached 0" aloft. Open it on the live map to see the swath over the streets.
A tornado was also reported to the National Weather Service during this storm. The ground reports below show where it was filed.
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Peak hail signal 0.75" ≈ penny to nickel · the largest NEXRAD radar signature
Homes in the hail footprint 17
Ground reports 1 1 tornado
Radar surfaces 2 NEXRAD + estimated size
Convective day · Jul 4, 2026 · noon–noon UTC
Severity
The 7th most severe storm Greenville has seen in the last 12 months
Composite score · 2.3 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
2.3 /10
- Peak hail signal
- 19 /100
- Homes exposed
- 25 /100
- Ground truth
- 33 /100
Largest radar-indicated size — a signal of damage potential, not confirmation.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Evidence / storm surfaces
How Greenville saw the hail — from two instruments
Jul 4, 2026 · Greenville, 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
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
1
Radar-estimated hail size Surface resolved
Estimated size field 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
0"
The storm in context
Where Jul 4, 2026 sits in Greenville's hail record.
This was Greenville's 7th recorded hail day, arriving 3 days after the Jul 1, 2026 storm. By severity it ranks 7th of the 8 storms we have logged here. Radar put the day's largest stone over Greenville at 0.75" — the largest NEXRAD radar signature.
The Jul 4, 2026 convective day was bigger than Greenville: the same system put hail over 2,035 other tracked cities, 57 of them in Iowa. Nearest: Webb (5 miles east, up to 0.75"); Sioux Rapids (5 miles west, up to 0.5"); Royal (12 miles northwest, up to 1.5").
These maps are stills. In the app this date is one of 8 Greenville 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.
Tornado reports
1 reportNear the severe threshold
What 0.75" hail means for Greenville 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.
17 homes × $12,000 avg. claim
Potential roof exposure
$204K
Potential roof exposure — 17 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 $4 on top of the $150 plan.
Greenville hail history
Other storms in Greenville.
8 recorded storm days in Greenville, IA
Estimated-size surface Storm date Greenville / IA
Sep 1, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Greenville / IA
Jul 1, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Greenville / IA
Jun 28, 2026
2.5" Signatures 2.5" Estimated 1.25"
No ground reports filed Open report →
NEXRAD surface Storm date Greenville / IA
May 18, 2026
1.75" Signatures 1.75"
No ground reports filed Open report →
Estimated-size surface Storm date Greenville / IA
May 17, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Greenville / IA
Apr 23, 2026
1.5" Signatures 1.5" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Greenville / IA
Apr 13, 2026
1.5" Signatures 0.5" Estimated 1.5"
No ground reports filed Open report →
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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 2, 2026.