Hail size 1"
24 NNE Harrison Sioux County
“Spotter reported accumulating hail mostly between nickel and quarter sized that covered the ground completely. (CYS)”
— NOAA / SPC storm report
/ Storm field report · Sioux
Hail in Edgemont · Aug 17, 2026
Hit 26 days ago
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 2.25" aloft. At 2.25" — tennis ball — 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 2.25" ≈ tennis ball · radar-estimated size aloft
Homes in the hail footprint 233
Ground reports 3 1 hail · 2 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · Aug 17, 2026 · noon–noon UTC
Severity
The 4th most severe storm Edgemont has seen in the last 12 months
Composite score · 5.3 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
5.3 /10
- Peak hail signal
- 56 /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 Edgemont saw the hail — from two instruments
Aug 17, 2026 · Edgemont, 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.
NEXRAD radar signatures Surface resolved
Radar signature field NEXRAD's hail signatures for this storm: the spots the radar detected from above. A detection overhead is not the same thing as a confirmed stone below.
Max size
0"
Detections
0
Radar-estimated hail size Surface resolved
Estimated size field 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
2.25"
The storm in context
Where Aug 17, 2026 sits in Edgemont's hail record.
This was Edgemont's 11th recorded hail day, arriving 5 days after the Aug 12, 2026 storm. By severity it ranks 4th of the 13 storms we have logged here. Radar put the day's largest stone over Edgemont at 2.25" — radar-estimated size aloft.
The Aug 17, 2026 convective day was bigger than Edgemont: the same system put hail over 428 other tracked cities, 29 of them in South Dakota. Nearest: Whitney (33 miles southeast, up to 1.75"); Harrison (39 miles south, up to 2.25"); Chadron (43 miles southeast, up to 1").
These maps are stills. In the app this date is one of 13 Edgemont 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.
Hail reports
1 reportWind reports
2 reports Wind gust 75 mph
7 W Ardmore Fall River County
“(UNR)”
— NOAA / SPC storm report
Wind gust 97 mph
7 W Ardmore Fall River 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 13 minutes, from to .
Reports came from Harrison and Ardmore — beyond Edgemont itself.
Severe hail signal
What 2.25" hail means for Edgemont 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.
233 homes × $12,000 avg. claim
Potential roof exposure
$2.8M
Potential roof exposure — 233 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 233 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 $49 on top of the $150 plan.
Edgemont hail history
Other storms in Edgemont.
13 recorded storm days in Edgemont, SD
Estimated-size surface Storm date Edgemont / SD
Sep 6, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Edgemont / SD
Aug 22, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Edgemont / SD
Aug 12, 2026
2.75" Estimated 2.75"
6 ground reports Open report →
Estimated-size surface Storm date Edgemont / SD
Jul 8, 2026
1.25" Signatures 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Edgemont / SD
Jul 7, 2026
4" Signatures 4" Estimated 2.75"
1 ground report Open report →
Estimated-size surface Storm date Edgemont / SD
Jul 6, 2026
1.75" Signatures 1.75" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Edgemont / SD
Jul 3, 2026
2.5" Signatures 2.5" Estimated 1.75"
3 ground reports Open report →
Estimated-size surface Storm date Edgemont / SD
Jun 22, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Edgemont / SD
Jun 6, 2026
1.75" Signatures 1.75" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Edgemont / SD
Jun 2, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Edgemont / SD
Jun 1, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Edgemont / SD
May 30, 2026
2" Signatures 2" Estimated 1.25"
No ground reports filed 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 7, 2026.