Hail size 1"
Sanborn O'Brien County
“(FSD)”
— NOAA / SPC storm report
/ Storm field report · O'Brien
Hail in Sanborn · Jun 27, 2026
NEXRAD logged 0 hail signatures up to 1.75"; the estimated-size surface reached 1" aloft. Open it on the live map to see the swath over the streets.
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Peak hail signal 1.75" ≈ golf ball · the largest NEXRAD radar signature
Homes in the hail footprint 2,329
Ground reports 1 1 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Jun 27, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Sanborn has seen in the last 12 months
Composite score · 4.6 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
4.6 /10
- Peak hail signal
- 44 /100
- Homes exposed
- 67 /100
- Ground truth
- 17 /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 Sanborn saw the hail — from two instruments
Jun 27, 2026 · Sanborn, IA
Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.
NEXRAD radar signatures Surface resolved
Radar signature field The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.
Max size
1.75"
Detections
0
Radar-estimated hail size Surface resolved
Estimated size field Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.
Max size
1"
The storm in context
Where Jun 27, 2026 sits in Sanborn's hail record.
This was Sanborn's 6th recorded hail day, arriving 27 days after the May 31, 2026 storm. By severity it ranks 3rd of the 9 storms we have logged here. Radar put the day's largest stone over Sanborn at 1.75" — the largest NEXRAD radar signature.
The Jun 27, 2026 convective day was bigger than Sanborn: the same system put hail over 587 other tracked cities, 54 of them in Iowa. Nearest: Melvin (7 miles north, up to 1"); Hartley (12 miles northeast, up to 2.5"); Ashton (12 miles northwest, up to 1").
These maps are stills. In the app this date is one of 9 Sanborn 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.
Hail reports
1 reportHigh damage potential
What 1.75" hail means for Sanborn roofs.
Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
2,329 homes × $12,000 avg. claim
Potential roof exposure
$28M
Potential roof exposure — 2,329 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 12 jobs
- Illustrative work
- ~$180K
Close just 0.5% of the 2,329 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
June 2028
Claims from this storm can typically be filed until around June 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 $489 on top of the $150 plan.
Sanborn hail history
Other storms in Sanborn.
9 recorded storm days in Sanborn, IA
Estimated-size surface Storm date Sanborn / IA
Aug 3, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sanborn / IA
Jun 30, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sanborn / IA
Jun 29, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Sanborn / IA
May 31, 2026
No ground reports filed Open report →
Estimated-size surface Storm date Sanborn / IA
May 24, 2026
0.5" Estimated 0.5"
1 ground report Open report →
Estimated-size surface Storm date Sanborn / IA
May 18, 2026
2.25" Signatures 2.25" Estimated 0.5"
1 ground report Open report →
Estimated-size surface Storm date Sanborn / IA
May 17, 2026
1.75" Signatures 1.75" Estimated 1.25"
1 ground report Open report →
Estimated-size surface Storm date Sanborn / IA
Apr 13, 2026
2" Signatures 2" Estimated 1.25"
7 ground reports Open report →
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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For iPhone. Android coming soon.
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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 Aug 4, 2026.