/ Storm field report · Pennington

Hail in Hermosa · Aug 23, 2026

Hit 20 days ago

NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 1.5" aloft. Open it on the live map to see the swath over the streets.

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Peak hail signal 1.5" ≈ ping-pong ball · radar-estimated size aloft

Homes in the hail footprint 1,586

Ground reports 1 1 hail

Radar surfaces 2 NEXRAD + estimated size

Convective day · Aug 23, 2026 · noon–noon UTC

Severity

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

Composite score · 4.1 / 10

Storm severity score

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

4.1 /10

Peak hail signal: 38 /100
Homes exposed: 64 /100
Ground truth: 17 /100

Evidence / storm surfaces

How Hermosa saw the hail — from two instruments

Aug 23, 2026 · Hermosa, SD

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.

NEXRAD radar-signature map of the hail storm over Hermosa, SD on Aug 23, 2026 — 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.

Max size 0" Detections 0

Radar-estimated hail-size map of the storm over Hermosa, SD on Aug 23, 2026 — Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.

Max size 1.5"

The storm in context

Where Aug 23, 2026 sits in Hermosa's hail record.

This was Hermosa's 10th recorded hail day, arriving 5 days after the Aug 18, 2026 storm. By severity it ranks 6th of the 11 storms we have logged here. Radar put the day's largest stone over Hermosa at 1.5" — radar-estimated size aloft.

The Aug 23, 2026 convective day was bigger than Hermosa: the same system put hail over 185 other tracked cities, 18 of them in South Dakota. Nearest: Rapid City (20 miles northwest, up to 2.25"); Deadwood (24 miles northwest, up to 2.25"); Lead (32 miles northwest, up to 1").

These maps are stills. In the app this date is one of 11 Hermosa 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

1 report 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

1 report

Hail size 1"

Hermosa Custer County

9:18 PM UTC

“Via social media. Time estimated based on radar. (UNR)”
— NOAA / SPC storm report

High damage potential

What 1.5" hail means for Hermosa roofs.

Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.

Radar reading · not confirmed damage

Roofing exposure

What this storm is worth to a roofer.

1,586 homes × $12,000 avg. claim

Potential roof exposure

$19M

Potential roof exposure — 1,586 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 1,586 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 $333 on top of the $150 plan.

Hermosa hail history

11 recorded storm days in Hermosa, SD

← All hail in Hermosa

Radar-estimated hail-size map of the storm over Hermosa, SD on Aug 24, 2026

Estimated-size surface

Storm date Hermosa / SD

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See the hail, review your recommendations, and canvass with Overview on iPhone.

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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 25, 2026.

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

How Hermosa saw the hail — from two instruments

Where Aug 23, 2026 sits in Hermosa's hail record.

What people on the ground reported

Hail reports

What 1.5" hail means for Hermosa roofs.

What this storm is worth to a roofer.

Other storms in Hermosa.

Aug 24, 2026

Aug 18, 2026

Aug 16, 2026

Aug 11, 2026

Jul 28, 2026

Jul 3, 2026

Jun 27, 2026

Jun 26, 2026

Jun 2, 2026

May 31, 2026

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