/ Storm field report · Sully

Hail in Pierre · Sep 27, 2026

Hit 4 days ago

The estimated-size surface reached 1.5" aloft; NEXRAD logged no point detections over Pierre that day. Open it on the live map to see the swath over the streets.

7-day free trial in the iPhone app. No card required to start.

For iPhone. Android coming soon.

Open this storm on the live map → Start free trial

Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.

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

Homes in the hail footprint 143

Ground reports 1 1 wind

Radar surfaces 1 Estimated size only

Convective day · Sep 27, 2026 · noon–noon UTC

Severity

The 3rd most severe storm Pierre has seen in the last 12 months

Composite score · 3.6 / 10

Storm severity score

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

3.6 /10

Peak hail signal: 38 /100
Homes exposed: 43 /100
Ground truth: 17 /100

Evidence / storm surfaces

How Pierre saw the hail — from two instruments

Sep 27, 2026 · Pierre, 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 Pierre, SD on Sep 27, 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 27, 2026 — this storm produced no NEXRAD point detections over Pierre, so there is one map to show, not two.

The storm in context

Where Sep 27, 2026 sits in Pierre's hail record.

This was Pierre's 10th recorded hail day, arriving 21 days after the Sep 6, 2026 storm. By severity it ranks 3rd of the 10 storms we have logged here. Radar put the day's largest stone over Pierre at 1.5" — radar-estimated size aloft.

The Sep 27, 2026 convective day was bigger than Pierre: the same system put hail over 43 other tracked cities, 11 of them in South Dakota. Nearest: Midland (35 miles west, up to 1.5"); Eagle Butte (44 miles northwest, up to 1.25"); Timber Lake (54 miles northwest, up to 1.25").

These maps are stills. In the app this date is one of 10 Pierre 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 66 mph

10 NW Okobojo Creek Rec Sully County

2:40 PM UTC

“Ambient weather station. (ABR)”
— 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 Okobojo Creek Rec — beyond Pierre itself.

High damage potential

What 1.5" hail means for Pierre 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.

143 homes × $12,000 avg. claim

Potential roof exposure

$1.7M

Potential roof exposure — 143 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 143 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 $30 on top of the $150 plan.

Pierre hail history

10 recorded storm days in Pierre, SD

← All hail in Pierre

Radar-estimated hail-size map of the storm over Pierre, SD on Sep 6, 2026

Estimated-size surface

Storm date Pierre / SD

The next storm won’t wait for you.

Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.

7-day free trial in the iPhone app. No card required to start.

For iPhone. Android coming soon.

Open this storm on the live map → Start free trial

Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.

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 28, 2026.

The 3rd most severe storm Pierre has seen in the last 12 months

How Pierre saw the hail — from two instruments

Where Sep 27, 2026 sits in Pierre's hail record.

What people on the ground reported

Wind reports

How the storm moved

What 1.5" hail means for Pierre roofs.

What this storm is worth to a roofer.

Other storms in Pierre.

Sep 6, 2026

Jul 25, 2026

Jul 7, 2026

Jun 28, 2026

Jun 16, 2026

Jun 9, 2026

Jun 4, 2026

Jun 2, 2026

Apr 22, 2026

The next storm won’t wait for you.