Wind gust 60 mph
6 S Harrison Douglas County
“Personal weather station reported a 60 mph wind gust. (FSD)”
— NOAA / SPC storm report
/ Storm field report · Douglas
Hail in Armour · Sep 7, 2026
Hit 5 days ago
The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Armour that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 0.75" ≈ penny to nickel · radar-estimated size aloft
Homes in the hail footprint 215
Ground reports 3 3 wind
Radar surfaces 1 Estimated size only
Convective day · Sep 7, 2026 · noon–noon UTC
Severity
The 4th most severe storm Armour has seen in the last 12 months
Composite score · 3.0 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.0 /10
- Peak hail signal
- 19 /100
- Homes exposed
- 47 /100
- Ground truth
- 50 /100
Largest radar-indicated size — a signal of damage potential, not confirmation.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
Evidence / storm surfaces
How Armour saw the hail — from two instruments
Sep 7, 2026 · Armour, 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
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
0.75"
Only the radar-estimated size surface resolved for Sep 7, 2026 — this storm produced no NEXRAD point detections over Armour, so there is one map to show, not two.
The storm in context
Where Sep 7, 2026 sits in Armour's hail record.
This was Armour's 8th recorded hail day, arriving 3 days after the Sep 4, 2026 storm. By severity it ranks 4th of the 8 storms we have logged here. Radar put the day's largest stone over Armour at 0.75" — radar-estimated size aloft.
The Sep 7, 2026 convective day was bigger than Armour: the same system put hail over 163 other tracked cities, 19 of them in South Dakota. Nearest: Lake Andes (9 miles southwest, up to 0.5"); Geddes (14 miles southwest, up to 0.75"); Wagner (21 miles south, up to 1.25").
These maps are stills. In the app this date is one of 8 Armour 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
3 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
3 reports Wind gust 68 mph
Armour Douglas County
“Personal weather station reported a 68 mph wind gust. (FSD)”
— NOAA / SPC storm report
Wind gust 62 mph
2 S Armour Douglas County
“Personal weather station reported a 62 mph wind gust. (FSD)”
— 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 14 minutes, from to .
Reports came from Harrison — beyond Armour itself.
Near the severe threshold
What 0.75" hail means for Armour roofs.
A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
215 homes × $12,000 avg. claim
Potential roof exposure
$2.6M
Potential roof exposure — 215 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 215 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 $45 on top of the $150 plan.
Armour hail history
Other storms in Armour.
8 recorded storm days in Armour, SD
Map unavailable
NEXRAD surface Storm date Armour / SD
Sep 4, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Armour / SD
Aug 17, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Armour / SD
Aug 3, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Armour / SD
Jul 2, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Armour / SD
Jun 30, 2026
1" Signatures 1" Estimated 0.75"
1 ground report Open report →
Estimated-size surface Storm date Armour / SD
Jun 27, 2026
1.75" Signatures 1.75" Estimated 1.5"
No ground reports filed Open report →
Estimated-size surface Storm date Armour / SD
Jun 9, 2026
1" Estimated 1"
2 ground reports 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 Sep 8, 2026.