Hail in Custer · Aug 21, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 0.75" aloft. Open it on the live map to see the swath over the streets.
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Convective day · Aug 21, 2026 · noon–noon UTC
Severity
The 15th most severe storm Custer 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
- 19 /100
- Homes exposed
- 56 /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 Custer 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 21, 2026 sits in Custer's hail record.
This was Custer's 18th recorded hail day, arriving 9 days after the Aug 12, 2026 storm. By severity it ranks 15th of the 20 storms we have logged here. Radar put the day's largest stone over Custer at 0.75" — radar-estimated size aloft.
The Aug 21, 2026 convective day was bigger than Custer: the same system put hail over 659 other tracked cities, 6 of them in South Dakota. Nearest: Hot Springs (31 miles southeast, up to 1.25"); Oral (37 miles southeast, up to 3.25"); Smithwick (46 miles southeast, up to 3.5").
These maps are stills. In the app this date is one of 20 Custer 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 Custer. 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.
Near the severe threshold
What 0.75" hail means for Custer roofs.
A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$8M
Potential roof exposure — 667 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 3 jobs
- Illustrative work
- ~$45K
Close just 0.5% of the 667 homes in this footprint at the average $15,000 roof job. Illustrative math, not a projection — your results depend on your outreach and how the market responds.
Claim window
August 2028
Claims from this storm can typically be filed until around August 2028 — the window to reach these homeowners while it's still open. Deadlines vary by policy and state.
Names and phones for every home in the footprint: at most $140 on top of the $150 plan.
Custer hail history
Other storms in Custer.
Estimated-size surface Sep 13, 2026
0.5"
Estimated-size surface Aug 27, 2026
1"
Estimated-size surface Aug 12, 2026
2.25"
Estimated-size surface Aug 11, 2026
4"
Estimated-size surface Jul 31, 2026
3.5"
Estimated-size surface Jul 30, 2026
0.5"
Estimated-size surface Jul 28, 2026
1"
Estimated-size surface Jul 17, 2026
1"
Estimated-size surface Jul 9, 2026
2"
Estimated-size surface Jul 8, 2026
1.25"
Estimated-size surface Jul 4, 2026
2.5"
Estimated-size surface Jul 3, 2026
1.75"
Estimated-size surface Jun 26, 2026
1.75"
Estimated-size surface Jun 22, 2026
1.25"
Estimated-size surface Jun 7, 2026
0.5"
Estimated-size surface Jun 6, 2026
1.75"
Estimated-size surface Jun 2, 2026
1"
Estimated-size surface Jun 1, 2026
0.5"
Estimated-size surface May 30, 2026
1.75"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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