Hail in Garrison · Aug 30, 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 30, 2026 · noon–noon UTC
Severity
The 11th most severe storm Garrison 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 Garrison saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Estimated size field Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
The storm in context
Where Aug 30, 2026 sits in Garrison's hail record.
This was Garrison's 9th recorded hail day, arriving 31 days after the Jul 30, 2026 storm. By severity it ranks 11th of the 11 storms we have logged here. Radar put the day's largest stone over Garrison at 0.5" — radar-estimated size aloft.
The Aug 30, 2026 convective day was bigger than Garrison: the same system put hail over 117 other tracked cities, 42 of them in North Dakota. Nearest: Coleharbor (10 miles south, up to 0.5"); Hazen (18 miles southwest, up to 1.25"); Douglas (18 miles north, up to 0.5").
These maps are stills. In the app this date is one of 11 Garrison 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.
The National Weather Service logged no spotter reports for this storm over Garrison. That absence is ordinary — filing a report takes a person on the spot who saw the hail and phoned it in. What stands as the record for this date is the radar above, which caught the storm regardless.
Below the severe threshold
What 0.5" hail means for Garrison 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
Garrison hail history
Other storms in Garrison.
Estimated-size surface Sep 7, 2026
0.75"
Estimated-size surface Sep 6, 2026
1"
Estimated-size surface Jul 30, 2026
0.5"
Estimated-size surface Jul 29, 2026
1"
Estimated-size surface Jun 29, 2026
4"
Estimated-size surface Jun 28, 2026
4"
Estimated-size surface Jun 27, 2026
1"
Estimated-size surface Jun 9, 2026
1.5"
Estimated-size surface Jun 7, 2026
0.75"
Estimated-size surface May 21, 2026
0.75"Take your next area into the field.
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