Wind gust 62 mph
8 WNW Fairburn Custer County
“(UNR)”
— NOAA / SPC storm report
/ Storm field report · Pennington
Hail in Hermosa · Jul 28, 2026
NEXRAD logged 0 hail signatures up to 1"; the estimated-size surface reached 0.75" aloft. Open it on the live map to see the swath over the streets.
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Peak hail signal 1" ≈ quarter · the largest NEXRAD radar signature
Homes in the hail footprint 66
Ground reports 2 2 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · Jul 28, 2026 · noon–noon UTC
Severity
The 9th most severe storm Hermosa has seen in the last 12 months
Composite score · 2.9 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
2.9 /10
- Peak hail signal
- 25 /100
- Homes exposed
- 37 /100
- Ground truth
- 33 /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 Hermosa saw the hail — from two instruments
Jul 28, 2026 · Hermosa, 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
1"
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
0.75"
The storm in context
Where Jul 28, 2026 sits in Hermosa's hail record.
This was Hermosa's 6th recorded hail day, arriving 25 days after the Jul 3, 2026 storm. By severity it ranks 9th of the 11 storms we have logged here. Radar put the day's largest stone over Hermosa at 1" — the largest NEXRAD radar signature.
The Jul 28, 2026 convective day was bigger than Hermosa: the same system put hail over 686 other tracked cities, 5 of them in South Dakota. Nearest: Fairburn (17 miles south, up to 1"); Custer (32 miles west, up to 1"); Hot Springs (41 miles south, up to 1").
These maps are stills. In the app this date is one of 11 Hermosa 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
2 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
2 reports Wind gust 59 mph
8 WNW Fairburn Custer 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 60 minutes, from to .
Reports came from Fairburn — beyond Hermosa itself.
Damage-capable hail signal
What 1" hail means for Hermosa roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
66 homes × $12,000 avg. claim
Potential roof exposure
$792K
Potential roof exposure — 66 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
Claim window
July 2028
Claims from this storm can typically be filed until around July 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 $14 on top of the $150 plan.
Hermosa hail history
Other storms in Hermosa.
11 recorded storm days in Hermosa, SD
Estimated-size surface Storm date Hermosa / SD
Aug 24, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Hermosa / SD
Aug 23, 2026
1.5" Estimated 1.5"
1 ground report Open report →
Estimated-size surface Storm date Hermosa / SD
Aug 18, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Hermosa / SD
Aug 16, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Hermosa / SD
Aug 11, 2026
4" Estimated 4"
23 ground reports Open report →
Estimated-size surface Storm date Hermosa / SD
Jul 3, 2026
2.5" Signatures 2.5" Estimated 1.75"
2 ground reports Open report →
Estimated-size surface Storm date Hermosa / SD
Jun 27, 2026
2.5" Signatures 2.5" Estimated 1.5"
1 ground report Open report →
Estimated-size surface Storm date Hermosa / SD
Jun 26, 2026
2.5" Signatures 2.5" Estimated 1.5"
No ground reports filed Open report →
Estimated-size surface Storm date Hermosa / SD
Jun 2, 2026
2.25" Signatures 2.25" Estimated 1.5"
No ground reports filed Open report →
Estimated-size surface Storm date Hermosa / SD
May 31, 2026
1.75" Signatures 1.75" 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 Aug 25, 2026.