/ Storm field report · Adams

Hail in Lemmon · Aug 17, 2026

Hit 26 days ago

NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 1.75" aloft. Open it on the live map to see the swath over the streets.

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Peak hail signal 1.75" ≈ golf ball · radar-estimated size aloft

Homes in the hail footprint 314

Ground reports 2 2 wind

Radar surfaces 2 NEXRAD + estimated size

Convective day · Aug 17, 2026 · noon–noon UTC

Severity

The 4th most severe storm Lemmon 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: 44 /100
Homes exposed: 50 /100
Ground truth: 33 /100

Evidence / storm surfaces

How Lemmon saw the hail — from two instruments

Aug 17, 2026 · Lemmon, 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 Lemmon, SD on Aug 17, 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 Lemmon, SD on Aug 17, 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 1.75"

The storm in context

Where Aug 17, 2026 sits in Lemmon's hail record.

This was Lemmon's 8th recorded hail day, arriving 6 days after the Aug 11, 2026 storm. By severity it ranks 4th of the 9 storms we have logged here. Radar put the day's largest stone over Lemmon at 1.75" — radar-estimated size aloft.

The Aug 17, 2026 convective day was bigger than Lemmon: the same system put hail over 428 other tracked cities, 29 of them in South Dakota. Nearest: Hettinger (19 miles west, up to 1.25"); New Leipzig (28 miles north, up to 0.5"); Mott (29 miles north, up to 0.75").

These maps are stills. In the app this date is one of 9 Lemmon 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

2 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.

Wind reports

2 reports

Wind gust 59 mph

7 S Shadehill Perkins County

10:30 PM UTC

“(UNR)”
— NOAA / SPC storm report

Wind gust 60 mph

6 ENE Lodgepole Perkins County

10:02 PM UTC

“(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.

Hail was reported over 28 minutes, from 10:02 PM UTC to 10:30 PM UTC .

Reports came from Shadehill and Lodgepole — beyond Lemmon itself.

High damage potential

What 1.75" hail means for Lemmon 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.

314 homes × $12,000 avg. claim

Potential roof exposure

$3.8M

Potential roof exposure — 314 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs: 2 jobs
Illustrative work: ~$30K

Close just 0.5% of the 314 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 $66 on top of the $150 plan.

Lemmon hail history

9 recorded storm days in Lemmon, SD

← All hail in Lemmon

Radar-estimated hail-size map of the storm over Lemmon, SD on Aug 30, 2026

Estimated-size surface

Storm date Lemmon / SD

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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 31, 2026.

The 4th most severe storm Lemmon has seen in the last 12 months

How Lemmon saw the hail — from two instruments

Where Aug 17, 2026 sits in Lemmon's hail record.

What people on the ground reported

Wind reports

How the storm moved

What 1.75" hail means for Lemmon roofs.

What this storm is worth to a roofer.

Other storms in Lemmon.

Aug 30, 2026

Aug 11, 2026

Jul 29, 2026

Jul 2, 2026

Jul 1, 2026

Jun 27, 2026

Jun 7, 2026

May 21, 2026

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