Hail in Marengo · Aug 11, 2026
The estimated-size surface reached 1.5" aloft; NEXRAD logged no point detections over Marengo that day. Open it on the live map to see the swath over the streets.
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Convective day · Aug 11, 2026 · noon–noon UTC
Severity
The most severe storm Marengo 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
- 38 /100
- Homes exposed
- 70 /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 Marengo 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.
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.
Only the radar-estimated size surface resolved for Aug 11, 2026 — this storm produced no NEXRAD point detections over Marengo, so there is one map to show, not two.
The storm in context
Where Aug 11, 2026 sits in Marengo's hail record.
This was Marengo's 10th recorded hail day, arriving 32 days after the Jul 10, 2026 storm. By severity it ranks 1st of the 10 storms we have logged here. Radar put the day's largest stone over Marengo at 1.5" — radar-estimated size aloft.
The Aug 11, 2026 convective day was bigger than Marengo: the same system put hail over 1,041 other tracked cities, 89 of them in Iowa. Nearest: Ladora (4 miles southwest, up to 0.75"); Amana (8 miles northeast, up to 1.5"); Hartwick (8 miles northwest, up to 1.25").
These maps are stills. In the app this date is one of 10 Marengo 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.
Nobody on the ground filed a report over Marengo for this date, which says more about who was watching than about the storm: spotter reports only exist where there is an observer. The radar surfaces above carry the evidence for this one.
High damage potential
What 1.5" hail means for Marengo 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.
Potential roof exposure
$38M
Potential roof exposure — 3,156 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 16 jobs
- Illustrative work
- ~$240K
Close just 0.5% of the 3,156 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
August 2028
Claims from this storm can typically be filed until around August 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 $663 on top of the $150 plan.
Marengo hail history
Other storms in Marengo.
Estimated-size surface Jul 10, 2026
0.75"
Estimated-size surface Jul 3, 2026
1"
Estimated-size surface Jun 16, 2026
0.5"
Estimated-size surface Jun 11, 2026
0.5"
Estimated-size surface May 18, 2026
0.5"
Estimated-size surface Apr 23, 2026
Estimated-size surface Apr 17, 2026
1.25"
Estimated-size surface Apr 14, 2026
0.75"
Estimated-size surface Mar 30, 2026
1"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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