Tornado Rating unknown
3 SE Greenville Clay County
“Brief touchdown witnessed by Sheriffs deputy. (FSD)”
— NOAA / SPC storm report
Hail in Greenville Jul 4, 2026
Hit 30 days agoBoth radar surfaces caught this storm: NEXRAD logged 1 hail signature up to 0.75", and the radar-estimated size reached 0" aloft.
A tornado was also reported to the National Weather Service during this storm — see the ground reports below.
Largest hailstone
0.75"
≈ penny to nickel · the largest NEXRAD radar signature Homes in the hail footprint
17
Ground reports
1
1 tornadoThe 7th most severe storm Greenville has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
2.3 /10
- Hail size
- 19 /100
- Homes exposed
- 25 /100
- Ground truth
- 33 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Greenville saw the hail — from two instruments
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
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
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"
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 7 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 (7 miles south, up to 0.5"); Royal (12 miles northwest, up to 1.5").
These maps are stills from Greenville's Jul 4, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
What people on the ground reported
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 reportWhat 0.75" hail means for Greenville roofs
Hail this size sits right at the edge of the National Weather Service severe threshold. Newer roofs usually shrug it off, but aging or already-worn shingles can bruise, and soft metals — vents, flashing, gutters — often show the first dents.
What this storm is worth to a roofer
$204K
Potential roof exposure — 17 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage. 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.
Track hail over Greenville on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Greenville storm history — this Jul 4, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
Greenville hail history
← All hail in Greenville 7 recorded storm days in Greenville, IA
Other storms in Greenville
Jul 1, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed 
Jun 28, 2026
2.5" Signatures 2.5" Estimated 1.25"
No ground reports filed 
May 18, 2026
1.75" Signatures 1.75"
No ground reports filed 
May 17, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed 
Apr 23, 2026
1.5" Signatures 1.5" Estimated 0.75"
No ground reports filed 
Apr 13, 2026
1.5" Signatures 0.5" Estimated 1.5"
No ground reports filed
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 surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.