Hail in Hammond · Jul 20, 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 20, 2026 · noon–noon UTC
Severity
The 5th most severe storm Hammond 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 Hammond 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.
Radar signature field NEXRAD radar signatures — the point detections the storm produced overhead. A signature is where the radar saw hail, not a confirmed stone on the ground.
Only the NEXRAD radar-signature surface resolved for Jul 20, 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 20, 2026 sits in Hammond's hail record.
This was Hammond's 4th recorded hail day, arriving 26 days after the Jun 24, 2026 storm. By severity it ranks 5th of the 5 storms we have logged here. Radar put the day's largest stone over Hammond at 1" — the largest NEXRAD radar signature.
The Jul 20, 2026 convective day was bigger than Hammond: the same system put hail over 553 other tracked cities, 15 of them in Indiana. Nearest: Gary (10 miles east, up to 1"); Cedar Lake (14 miles south, up to 1"); Tinley Park (16 miles west, up to 0").
These maps are stills. In the app this date is one of 5 Hammond 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 Hammond, 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 Hammond 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
Hammond hail history
Other storms in Hammond.
Estimated-size surface Jul 27, 2026
1"
Estimated-size surface Jun 24, 2026
1.25"
Estimated-size surface May 4, 2026
0.75"
Estimated-size surface Mar 26, 2026
2.5"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.