Hail size 1"
5 SW Hot Springs Fall River County
“Photo via social media. Hail covered the ground and damaged tree foliage. Time estimated based on radar. (UNR)”
— NOAA / SPC storm report
/ Storm field report · Fall River
Hail in Hot Springs · Jul 31, 2026
NEXRAD logged 10 hail signatures up to 4"; the estimated-size surface reached 2" aloft. At 4" — softball or larger — 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 4" ≈ softball or larger · the largest NEXRAD radar signature
Homes in the hail footprint 120
Ground reports 6 6 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Jul 31, 2026 · noon–noon UTC
Severity
The most severe storm Hot Springs has seen in the last 12 months
Composite score · 8.5 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
8.5 /10
- Peak hail signal
- 100 /100
- Homes exposed
- 42 /100
- Ground truth
- 100 /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 Hot Springs saw the hail — from two instruments
Jul 31, 2026 · Hot Springs, 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
4"
Detections
10
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"
The storm in context
Where Jul 31, 2026 sits in Hot Springs's hail record.
This was Hot Springs's 14th recorded hail day, arriving 3 days after the Jul 28, 2026 storm. By severity it ranks 1st of the 18 storms we have logged here. Radar put the day's largest stone over Hot Springs at 4" — the largest NEXRAD radar signature.
The Jul 31, 2026 convective day was bigger than Hot Springs: the same system put hail over 238 other tracked cities, 2 of them in South Dakota. Nearest: Custer (31 miles northwest, up to 3.5"); Hill City (46 miles north, up to 1"); Carr (184 miles southwest, up to 0.75").
These maps are stills. In the app this date is one of 18 Hot Springs 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
6 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
6 reports Hail size 1"
1 SW Argyle Custer County
“(UNR)”
— NOAA / SPC storm report
Hail size 1.75"
Argyle Custer County
“Report and photo via social media confirming golf ball size hail fell in Argyle. Time estimated based on radar. (UNR)”
— NOAA / SPC storm report
Hail size 1"
3 SW Argyle Custer County
“(UNR)”
— NOAA / SPC storm report
Hail size 1.75"
2 SSW Argyle Custer County
“Large holes punched in outdoor plastic storage container. Hail lightly covered the ground. Smaller stones also observed. Time estimated based on radar. (UNR)”
— NOAA / SPC storm report
Hail size 1"
2 WSW Argyle 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.
The storm tracked southeast at roughly 20 mph, based on the timing of ground reports.
Hail was reported over 35 minutes, from to .
Reports came from Argyle — beyond Hot Springs itself.
Severe hail signal
What 4" hail means for Hot Springs 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.
120 homes × $12,000 avg. claim
Potential roof exposure
$1.4M
Potential roof exposure — 120 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 120 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
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 $25 on top of the $150 plan.
Hot Springs hail history
Other storms in Hot Springs.
18 recorded storm days in Hot Springs, SD
Estimated-size surface Storm date Hot Springs / SD
Sep 6, 2026
0.75" Estimated 0.75"
2 ground reports Open report →
Estimated-size surface Storm date Hot Springs / SD
Aug 27, 2026
1.75" Estimated 1.75"
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
Aug 21, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
Aug 12, 2026
2.75" Estimated 2.75"
5 ground reports Open report →
Estimated-size surface Storm date Hot Springs / SD
Jul 28, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
Jul 7, 2026
4" Signatures 4" Estimated 2.75"
1 ground report Open report →
Estimated-size surface Storm date Hot Springs / SD
Jul 6, 2026
2.5" Signatures 2.5" Estimated 1.5"
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
Jul 3, 2026
2.25" Signatures 2.25" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
Jun 28, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
Jun 27, 2026
2" Signatures 2" Estimated 1.25"
1 ground report Open report →
Estimated-size surface Storm date Hot Springs / SD
Jun 26, 2026
1.75" Signatures 1.75" Estimated 1.25"
2 ground reports Open report →
Estimated-size surface Storm date Hot Springs / SD
Jun 22, 2026
1" Estimated 1"
1 ground report Open report →
Estimated-size surface Storm date Hot Springs / SD
Jun 21, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
Jun 6, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
Jun 4, 2026
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
Jun 2, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Hot Springs / SD
May 30, 2026
2" Signatures 2" Estimated 1"
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.