/ Storm field report · Pennington

Hail in Custer · Aug 12, 2026

Hit 31 days ago

NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 2.25" aloft. At 2.25" — tennis ball — 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 2.25" ≈ tennis ball · radar-estimated size aloft
Homes in the hail footprint 111
Ground reports 0 none filed
Radar surfaces 2 NEXRAD + estimated size

Convective day · Aug 12, 2026 · noon–noon UTC

Severity

The 6th most severe storm Custer has seen in the last 12 months

Composite score · 4.4 / 10
Storm severity score

Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.

4.4 /10
Peak hail signal
56 /100

Largest radar-indicated size — a signal of damage potential, not confirmation.

Homes exposed
41 /100

How many homes sit inside the storm's footprint.

Ground truth
0 /100

Independent storm reports filed with the NWS.

Evidence / storm surfaces

How Custer saw the hail — from two instruments

Aug 12, 2026 · Custer, SD

Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.

NEXRAD radar signatures Surface resolved
NEXRAD radar-signature map of the hail storm over Custer, SD on Aug 12, 2026 Radar signature field

The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.

Max size 0" Detections 0
Radar-estimated hail size Surface resolved
Radar-estimated hail-size map of the storm over Custer, SD on Aug 12, 2026 Estimated size field

Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.

Max size 2.25"

The storm in context

Where Aug 12, 2026 sits in Custer's hail record.

This was Custer's 17th recorded hail day, arriving 1 day after the Aug 11, 2026 storm. By severity it ranks 6th of the 19 storms we have logged here. Radar put the day's largest stone over Custer at 2.25" — radar-estimated size aloft.

The Aug 12, 2026 convective day was bigger than Custer: the same system put hail over 507 other tracked cities, 11 of them in South Dakota. Nearest: Pringle (14 miles south, up to 0.5"); Hot Springs (31 miles south, up to 2.75"); Oelrichs (45 miles southeast, up to 2.5").

These maps are stills. In the app this date is one of 19 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

No 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.

For this storm over Custer, 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.

Severe hail signal

What 2.25" 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.

111 homes × $12,000 avg. claim

Potential roof exposure

$1.3M

Potential roof exposure — 111 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs
1 job
Illustrative work
~$15K

Close just 0.5% of the 111 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 $23 on top of the $150 plan.

Custer hail history

19 recorded storm days in Custer, SD
Radar-estimated hail-size map of the storm over Custer, SD on Aug 27, 2026 Estimated-size surface
Storm date Custer / SD

Aug 27, 2026

1"
Estimated 1"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Aug 21, 2026 Estimated-size surface
Storm date Custer / SD

Aug 21, 2026

0.75"
Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Aug 11, 2026 Estimated-size surface
Storm date Custer / SD

Aug 11, 2026

4"
Estimated 4"
4 ground reports Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jul 31, 2026 Estimated-size surface
Storm date Custer / SD

Jul 31, 2026

3.5"
Signatures 3.5" Estimated 1.75"
2 ground reports Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jul 30, 2026 Estimated-size surface
Storm date Custer / SD

Jul 30, 2026

0.5"
Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jul 28, 2026 Estimated-size surface
Storm date Custer / SD

Jul 28, 2026

1"
Signatures 1" Estimated 0.5"
2 ground reports Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jul 17, 2026 Estimated-size surface
Storm date Custer / SD

Jul 17, 2026

1"
Estimated 1"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jul 9, 2026 Estimated-size surface
Storm date Custer / SD

Jul 9, 2026

2"
Signatures 2" Estimated 1.25"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jul 8, 2026 Estimated-size surface
Storm date Custer / SD

Jul 8, 2026

1.25"
Signatures 1.25" Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jul 4, 2026 Estimated-size surface
Storm date Custer / SD

Jul 4, 2026

2.5"
Signatures 2.5" Estimated 1.75"
3 ground reports Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jul 3, 2026 Estimated-size surface
Storm date Custer / SD

Jul 3, 2026

1.75"
Signatures 1.75" Estimated 1.25"
7 ground reports Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jun 26, 2026 Estimated-size surface
Storm date Custer / SD

Jun 26, 2026

1.75"
Signatures 1.75" Estimated 1.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jun 22, 2026 Estimated-size surface
Storm date Custer / SD

Jun 22, 2026

1.25"
Estimated 1.25"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jun 7, 2026 Estimated-size surface
Storm date Custer / SD

Jun 7, 2026

0.5"
Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jun 6, 2026 Estimated-size surface
Storm date Custer / SD

Jun 6, 2026

1.75"
Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jun 2, 2026 Estimated-size surface
Storm date Custer / SD

Jun 2, 2026

1"
Signatures 1" Estimated 1"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on Jun 1, 2026 Estimated-size surface
Storm date Custer / SD

Jun 1, 2026

0.5"
Estimated 0.5"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Custer, SD on May 30, 2026 Estimated-size surface
Storm date Custer / SD

May 30, 2026

1.75"
Signatures 1.75" Estimated 1"
No ground reports filed Open report →

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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 Aug 28, 2026.