Hail in Altona · Jul 3, 2026
NEXRAD logged 0 hail signatures up to 1"; the estimated-size surface had no signal that day. Open it on the live map to see the swath over the streets.
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Convective day · Jul 3, 2026 · noon–noon UTC
Severity
The 4th most severe storm Altona 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
- 25 /100
- Homes exposed
- 0 /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 Altona 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.
Radar signature field Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
Only the NEXRAD radar-signature surface resolved for Jul 3, 2026 — the estimated-size swath had no hail signal to model for this storm, so there is one map to show, not two.
The storm in context
Where Jul 3, 2026 sits in Altona's hail record.
This was Altona's 4th recorded hail day, arriving 49 days after the May 15, 2026 storm. By severity it ranks 4th of the 4 storms we have logged here. Radar put the day's largest stone over Altona at 1" — the largest NEXRAD radar signature.
The Jul 3, 2026 convective day was bigger than Altona: the same system put hail over 1,885 other tracked cities, 215 of them in Illinois. Nearest: Oneida (5 miles west, up to 1"); Galva (9 miles northeast, up to 1"); Andover (15 miles north, up to 1.25").
These maps are stills. In the app this date is one of 4 Altona 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 Altona, 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.
Damage-capable hail signal
What 1" hail means for Altona roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Altona hail history
Other storms in Altona.
Estimated-size surface May 15, 2026
1"
Estimated-size surface Apr 2, 2026
1"
Estimated-size surface Mar 10, 2026
1.75"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.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.