Hail in Greenfield · Jul 20, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 0.75" aloft. Open it on the live map to see the swath over the streets.
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Convective day · Jul 20, 2026 · noon–noon UTC
Severity
The 4th most severe storm Greenfield has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 19 /100
- Homes exposed
- 61 /100
- Ground truth
- 0 /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 Greenfield saw the hail — from two instruments
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.
Radar signature field 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.
Estimated size field Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
The storm in context
Where Jul 20, 2026 sits in Greenfield's hail record.
This was Greenfield's 9th recorded hail day, arriving 17 days after the Jul 3, 2026 storm. By severity it ranks 4th of the 10 storms we have logged here. Radar put the day's largest stone over Greenfield at 0.75" — radar-estimated size aloft.
The Jul 20, 2026 convective day was bigger than Greenfield: the same system put hail over 553 other tracked cities, 178 of them in Iowa. Nearest: Fontanelle (9 miles northwest, up to 0.75"); Orient (9 miles southwest, up to 0.75"); Dexter (12 miles northeast, up to 1.25").
These maps are stills. In the app this date is one of 10 Greenfield 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
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 Greenfield, 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 Greenfield 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.
Potential roof exposure
$13M
Potential roof exposure — 1,071 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 5 jobs
- Illustrative work
- ~$75K
Close just 0.5% of the 1,071 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 $225 on top of the $150 plan.
Greenfield hail history
Other storms in Greenfield.
Estimated-size surface Aug 13, 2026
1"
Estimated-size surface Jul 3, 2026
1"
Estimated-size surface Jun 5, 2026
1.75"
Estimated-size surface May 18, 2026
1"
Estimated-size surface May 15, 2026
1"
Estimated-size surface Apr 23, 2026
1.5"
Estimated-size surface Apr 15, 2026
0.5"
Estimated-size surface Mar 6, 2026
0.5"
Estimated-size surface Mar 5, 2026
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.
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