Hail in Altamont · Aug 26, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Altamont that day. Open it on the live map to see the swath over the streets.
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Convective day · Aug 26, 2026 · noon–noon UTC
Severity
The 8th most severe storm Altamont 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
- 25 /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 Altamont 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.
Estimated size field 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.
Only the radar-estimated size surface resolved for Aug 26, 2026 — this storm produced no NEXRAD point detections over Altamont, so there is one map to show, not two.
The storm in context
Where Aug 26, 2026 sits in Altamont's hail record.
This was Altamont's 8th recorded hail day, arriving 31 days after the Jul 26, 2026 storm. By severity it ranks 8th of the 8 storms we have logged here. Radar put the day's largest stone over Altamont at 0.5" — radar-estimated size aloft.
The Aug 26, 2026 convective day was bigger than Altamont: the same system put hail over 440 other tracked cities, 5 of them in Illinois. Nearest: Hume (68 miles northeast, up to 0.5"); Allendale (72 miles southeast, up to 0.75"); Bicknell (78 miles east, up to 0.75").
These maps are stills. In the app this date is one of 8 Altamont 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.
No ground reports were filed with the National Weather Service for this storm over Altamont. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Below the severe threshold
What 0.5" hail means for Altamont 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
$204K
Potential roof exposure — 17 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
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 $4 on top of the $150 plan.
Altamont hail history
Other storms in Altamont.
Estimated-size surface Jul 26, 2026
1.75"
Estimated-size surface Jul 3, 2026
1.25"
Estimated-size surface Jun 17, 2026
1.5"
Estimated-size surface Jun 11, 2026
0.5"
Estimated-size surface May 3, 2026
1"
Estimated-size surface Apr 27, 2026
1"
Estimated-size surface Mar 22, 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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