Hail in Marengo · Jul 17, 2026
The estimated-size surface reached 0.5" 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 · Jul 17, 2026 · noon–noon UTC
Severity
The 6th 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
- 13 /100
- Homes exposed
- 44 /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
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.
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.
Only the radar-estimated size surface resolved for Jul 17, 2026 — this storm produced no NEXRAD point detections over Marengo, so there is one map to show, not two.
The storm in context
Where Jul 17, 2026 sits in Marengo's hail record.
This was Marengo's 8th recorded hail day, arriving 13 days after the Jul 4, 2026 storm. By severity it ranks 6th of the 10 storms we have logged here. Radar put the day's largest stone over Marengo at 0.5" — radar-estimated size aloft.
The Jul 17, 2026 convective day was bigger than Marengo: the same system put hail over 415 other tracked cities, 2 of them in Illinois. Nearest: Mokena (69 miles southeast, up to 0.5"); Paw Paw (143 miles east, up to 0.5"); Wayland (155 miles east, up to 0.75").
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.
Below the severe threshold
What 0.5" hail means for Marengo roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$1.9M
Potential roof exposure — 161 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 1 job
- Illustrative work
- ~$15K
Close just 0.5% of the 161 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 $34 on top of the $150 plan.
Marengo hail history
Other storms in Marengo.
Estimated-size surface Aug 9, 2026
0.5"
Estimated-size surface Jul 27, 2026
1"
Estimated-size surface Jul 4, 2026
1"
Estimated-size surface Jul 2, 2026
0.5"
Estimated-size surface Jun 11, 2026
0.5"
NEXRAD surface Jun 5, 2026
Estimated-size surface Apr 14, 2026
0.75"
NEXRAD surface Apr 2, 2026
Estimated-size surface Mar 30, 2026
1"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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