/ Storm field report · Union

Hail in Alcester · Sep 1, 2026

The estimated-size surface reached 1.5" aloft; NEXRAD logged no point detections over Alcester that day. 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 3,288

Ground reports 1 1 wind

Radar surfaces 1 Estimated size only

Convective day · Sep 1, 2026 · noon–noon UTC

Severity

The 2nd most severe storm Alcester has seen in the last 12 months

Composite score · 4.3 / 10

Storm severity score

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

4.3 /10

Peak hail signal: 38 /100
Homes exposed: 70 /100
Ground truth: 17 /100

Evidence / storm surfaces

How Alcester saw the hail — from two instruments

Sep 1, 2026 · Alcester, SD

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-estimated hail-size map of the storm over Alcester, SD on Sep 1, 2026 — 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.

Max size 1.5"

Only the radar-estimated size surface resolved for Sep 1, 2026 — this storm produced no NEXRAD point detections over Alcester, so there is one map to show, not two.

The storm in context

Where Sep 1, 2026 sits in Alcester's hail record.

This was Alcester's 8th recorded hail day, arriving 29 days after the Aug 3, 2026 storm. By severity it ranks 2nd of the 10 storms we have logged here. Radar put the day's largest stone over Alcester at 1.5" — radar-estimated size aloft.

The Sep 1, 2026 convective day was bigger than Alcester: the same system put hail over 362 other tracked cities, 42 of them in South Dakota. Nearest: Beresford (8 miles northwest, up to 1.5"); Akron (8 miles southeast, up to 1"); Hawarden (11 miles east, up to 1.25").

These maps are stills. In the app this date is one of 10 Alcester 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.

Wind reports

1 report

Wind gust 60 mph

10 SSE Alcester Union County

2:30 AM UTC

“Wind measured by anemometer. (FSD)”
— NOAA / SPC storm report

High damage potential

What 1.5" hail means for Alcester 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.

3,288 homes × $12,000 avg. claim

Potential roof exposure

$39M

Potential roof exposure — 3,288 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.

Illustrative jobs: 16 jobs
Illustrative work: ~$240K

Close just 0.5% of the 3,288 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

September 2028

Claims from this storm can typically be filed until around September 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 $690 on top of the $150 plan.

Alcester hail history

10 recorded storm days in Alcester, SD

← All hail in Alcester

Map unavailable

NEXRAD surface

Storm date Alcester / 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 Oct 9, 2026.

The 2nd most severe storm Alcester has seen in the last 12 months

How Alcester saw the hail — from two instruments

Where Sep 1, 2026 sits in Alcester's hail record.

What people on the ground reported

Wind reports

What 1.5" hail means for Alcester roofs.

What this storm is worth to a roofer.

Other storms in Alcester.

Oct 8, 2026

Sep 11, 2026

Aug 3, 2026

Jul 25, 2026

Jul 2, 2026

Jun 30, 2026

Jun 29, 2026

May 31, 2026

May 17, 2026

The next storm won’t wait for you.