Hail in Glenville · Jul 20, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Glenville 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 13th most severe storm Glenville 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
- 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 Glenville 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 Jul 20, 2026 — this storm produced no NEXRAD point detections over Glenville, so there is one map to show, not two.
The storm in context
Where Jul 20, 2026 sits in Glenville's hail record.
This was Glenville's 11th recorded hail day, arriving 12 days after the Jul 8, 2026 storm. By severity it ranks 13th of the 14 storms we have logged here. Radar put the day's largest stone over Glenville at 0.5" — radar-estimated size aloft.
The Jul 20, 2026 convective day was bigger than Glenville: the same system put hail over 553 other tracked cities. Nearest: Mason City (21 miles south, up to 1.25"); Nora Springs (23 miles southeast, up to 1.25"); Clear Lake (23 miles southwest, up to 0.5").
These maps are stills. In the app this date is one of 14 Glenville 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 Glenville, 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.
Below the severe threshold
What 0.5" hail means for Glenville 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
Glenville hail history
Other storms in Glenville.
Estimated-size surface Sep 1, 2026
1"
Estimated-size surface Aug 20, 2026
0.5"
Estimated-size surface Aug 7, 2026
0.75"
Estimated-size surface Jul 8, 2026
1"
Estimated-size surface Jul 2, 2026
1.25"
Estimated-size surface Jul 1, 2026
1.25"
Estimated-size surface Jun 30, 2026
1"
Estimated-size surface May 26, 2026
1.75"
Estimated-size surface Apr 23, 2026
1"
Estimated-size surface Apr 17, 2026
0.75"
Estimated-size surface Apr 13, 2026
0.75"
Estimated-size surface Apr 11, 2026
NEXRAD surface Apr 3, 2026
0.75"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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