/ Storm field report · Jackson

Hail in Interior · Aug 11, 2026

Hit 32 days ago

The estimated-size surface reached 2.5" aloft; NEXRAD logged no point detections over Interior that day. At 2.5" — baseball — 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 2.5" ≈ baseball · radar-estimated size aloft
Homes in the hail footprint 488
Ground reports 5 1 hail · 4 wind
Radar surfaces 1 Estimated size only

Convective day · Aug 11, 2026 · noon–noon UTC

Severity

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

Composite score · 6.3 / 10
Storm severity score

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

6.3 /10
Peak hail signal
63 /100

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

Homes exposed
54 /100

How many homes sit inside the storm's footprint.

Ground truth
83 /100

Independent storm reports filed with the NWS.

Evidence / storm surfaces

How Interior saw the hail — from two instruments

Aug 11, 2026 · Interior, SD

The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.

Radar-estimated hail size Surface resolved
Radar-estimated hail-size map of the storm over Interior, SD on Aug 11, 2026 Estimated size field

The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.

Max size 2.5"

Only the radar-estimated size surface resolved for Aug 11, 2026 — this storm produced no NEXRAD point detections over Interior, so there is one map to show, not two.

The storm in context

Where Aug 11, 2026 sits in Interior's hail record.

This was Interior's 8th recorded hail day, arriving 13 days after the Jul 29, 2026 storm. By severity it ranks 2nd of the 8 storms we have logged here. Radar put the day's largest stone over Interior at 2.5" — radar-estimated size aloft.

The Aug 11, 2026 convective day was bigger than Interior: the same system put hail over 1,041 other tracked cities, 44 of them in South Dakota. Nearest: Kadoka (20 miles east, up to 1"); Scenic (25 miles northwest, up to 1.5"); Quinn (28 miles north, up to 2.5").

These maps are stills. In the app this date is one of 8 Interior 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

5 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.

Hail reports

1 report
Hail size 1.25"
1 NE Cedar Pass Jackson County

“mPING report (UNR)”

— NOAA / SPC storm report

Wind reports

4 reports
Wind gust 70 mph
Interior Jackson County

“Measured on a personal weather station in Interior. (UNR)”

— NOAA / SPC storm report
Wind gust 66 mph
4 E Cactus Flat Jackson County

“(UNR)”

— NOAA / SPC storm report
Wind gust 86 mph
4 E Cactus Flat Jackson County

“(UNR)”

— NOAA / SPC storm report
Wind gust 102 mph
4 E Cactus Flat Jackson County

“(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 21 minutes, from to .

Reports came from Cedar Pass and Cactus Flat — beyond Interior itself.

Severe hail signal

What 2.5" hail means for Interior 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.

488 homes × $12,000 avg. claim

Potential roof exposure

$5.9M

Potential roof exposure — 488 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 488 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 $102 on top of the $150 plan.

Interior hail history

Other storms in Interior.

8 recorded storm days in Interior, SD
← All hail in Interior
Radar-estimated hail-size map of the storm over Interior, SD on Jul 29, 2026 Estimated-size surface
Storm date Interior / SD

Jul 29, 2026

1.75"
Signatures 1.75" Estimated 0.75"
2 ground reports Open report →
Radar-estimated hail-size map of the storm over Interior, SD on Jul 27, 2026 Estimated-size surface
Storm date Interior / SD

Jul 27, 2026

1.75"
Estimated 1.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Interior, SD on Jul 3, 2026 Estimated-size surface
Storm date Interior / SD

Jul 3, 2026

1.5"
Signatures 1.5" Estimated 1"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Interior, SD on Jul 2, 2026 Estimated-size surface
Storm date Interior / SD

Jul 2, 2026

1"
Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Radar-estimated hail-size map of the storm over Interior, SD on Jun 28, 2026 Estimated-size surface
Storm date Interior / SD

Jun 28, 2026

4"
Signatures 4" Estimated 2.5"
1 ground report Open report →
Radar-estimated hail-size map of the storm over Interior, SD on Jun 27, 2026 Estimated-size surface
Storm date Interior / SD

Jun 27, 2026

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

Jun 2, 2026

2.75"
Signatures 2.75" Estimated 1.5"
1 ground report 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 12, 2026.