Hail size 2"
Rockerville Pennington County
“Numerous broken windshields reported. Hail covered the ground and roads. Photo and report via social media. Time estimated based on radar. (UNR)”
— NOAA / SPC storm report
/ Storm field report · Custer
Hail in Custer · Aug 11, 2026
Hit 34 days ago
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 4" aloft. At 4" — softball or larger — this is a severe hail signal associated with roof damage. Open it on the live map to see the swath over the streets.
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Peak hail signal 4" ≈ softball or larger · radar-estimated size aloft
Homes in the hail footprint 1,651
Ground reports 4 4 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Aug 11, 2026 · noon–noon UTC
Severity
The most severe storm Custer has seen in the last 12 months
Composite score · 8.6 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
8.6 /10
- Peak hail signal
- 100 /100
- Homes exposed
- 64 /100
- Ground truth
- 67 /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
Aug 11, 2026 · Custer, SD
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
NEXRAD radar signatures Surface resolved
Radar signature field Where NEXRAD flagged hail as the storm passed — point signatures from the radar, which indicate hail overhead rather than confirm what landed.
Max size
0"
Detections
0
Radar-estimated hail size Surface resolved
Estimated size field The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Max size
4"
The storm in context
Where Aug 11, 2026 sits in Custer's hail record.
This was Custer's 16th recorded hail day, arriving 11 days after the Jul 31, 2026 storm. By severity it ranks 1st of the 20 storms we have logged here. Radar put the day's largest stone over Custer at 4" — radar-estimated size aloft.
The Aug 11, 2026 convective day was bigger than Custer: the same system put hail over 1,041 other tracked cities, 44 of them in South Dakota. Nearest: Hill City (18 miles north, up to 1.75"); Deadwood (26 miles north, up to 2"); Rapid City (28 miles northeast, up to 4").
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
4 reports filed with the NWS
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.
Hail reports
4 reports Hail size 2.5"
Rockerville Pennington County
“(UNR)”
— NOAA / SPC storm report
Hail size 2"
2 SSE Rockerville Pennington County
“Relayed via NWS Cheyenne. Time estimated based on radar. (UNR)”
— NOAA / SPC storm report
Hail size 2.5"
1 S Rockerville Pennington County
“Photo via social media. Time estimated based on radar. (UNR)”
— NOAA / SPC storm report
Storm forensics
How the storm moved
Timing and place names from NOAA ground reports
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Reports came from Rockerville — beyond Custer itself.
Severe hail signal
What 4" hail means for Custer roofs.
Two-inch-plus hail is capable of puncturing shingles, breaking skylights or windows, and heavily denting soft materials. The strongest radar bands warrant prompt inspection, but neither the signal nor the footprint confirms damage at a specific address.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
1,651 homes × $12,000 avg. claim
Potential roof exposure
$20M
Potential roof exposure — 1,651 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 8 jobs
- Illustrative work
- ~$120K
Close just 0.5% of the 1,651 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 $347 on top of the $150 plan.
Custer hail history
Other storms in Custer.
20 recorded storm days in Custer, SD
Estimated-size surface Storm date Custer / SD
Sep 13, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Aug 27, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Aug 21, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Aug 12, 2026
2.25" Estimated 2.25"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jul 31, 2026
3.5" Signatures 3.5" Estimated 1.75"
2 ground reports Open report →
Estimated-size surface Storm date Custer / SD
Jul 30, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jul 28, 2026
1" Signatures 1" Estimated 0.5"
2 ground reports Open report →
Estimated-size surface Storm date Custer / SD
Jul 17, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jul 9, 2026
2" Signatures 2" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jul 8, 2026
1.25" Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jul 4, 2026
2.5" Signatures 2.5" Estimated 1.75"
3 ground reports Open report →
Estimated-size surface Storm date Custer / SD
Jul 3, 2026
1.75" Signatures 1.75" Estimated 1.25"
7 ground reports Open report →
Estimated-size surface Storm date Custer / SD
Jun 26, 2026
1.75" Signatures 1.75" Estimated 1.5"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jun 22, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jun 7, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jun 6, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jun 2, 2026
1" Signatures 1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
Jun 1, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Custer / SD
May 30, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Take your next area into the field.
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A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar tells you where to look. Only an inspection confirms damage at an address. Last updated Sep 14, 2026.