Hail in Grover · Aug 13, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 0.5" aloft. Open it on the live map to see the swath over the streets.
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Convective day · Aug 13, 2026 · noon–noon UTC
Severity
The 13th most severe storm Grover 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 Grover 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.
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.
The storm in context
Where Aug 13, 2026 sits in Grover's hail record.
This was Grover's 10th recorded hail day, arriving 35 days after the Jul 9, 2026 storm. By severity it ranks 13th of the 13 storms we have logged here. Radar put the day's largest stone over Grover at 0.5" — radar-estimated size aloft.
The Aug 13, 2026 convective day was bigger than Grover: the same system put hail over 437 other tracked cities, 22 of them in Colorado. Nearest: Pine Bluffs (10 miles north, up to 1.25"); Burns (20 miles northwest, up to 0.5"); Bushnell (27 miles northeast, up to 2").
These maps are stills. In the app this date is one of 13 Grover 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 Grover 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 Grover 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
Grover hail history
Other storms in Grover.
Estimated-size surface Sep 5, 2026
0.5"
Estimated-size surface Aug 22, 2026
1"
Estimated-size surface Aug 14, 2026
0.75"
Estimated-size surface Jul 9, 2026
1.25"
Estimated-size surface Jul 8, 2026
1.5"
Estimated-size surface Jul 3, 2026
1"
Estimated-size surface Jul 1, 2026
2.5"
Estimated-size surface Jun 26, 2026
2.5"
Estimated-size surface Jun 24, 2026
2.25"
Estimated-size surface Jun 20, 2026
1"
Estimated-size surface Jun 3, 2026
0.75"
Estimated-size surface May 30, 2026
3"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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