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
Hail in Hot Springs Jul 31, 2026
Hit 3 days agoBoth radar surfaces caught this storm: NEXRAD logged 10 hail signatures up to 4", and the radar-estimated size reached 2" aloft. At 4" — softball or larger — this is severe, roof-replacing hail: close to every roof inside the footprint becomes a claim candidate.
Largest hailstone
4"
≈ softball or larger · the largest NEXRAD radar signature Homes in the hail footprint
120
Ground reports
6
6 hailThe most severe storm Hot Springs has seen in the last 12 months
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
8.5 /10
- Hail size
- 100 /100
- Homes exposed
- 42 /100
- Ground truth
- 100 /100
Largest hailstone — the top predictor of roof damage.
How many homes sit inside the storm's footprint.
Independent storm reports filed with the NWS.
How Hot Springs saw the hail — from two instruments
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
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
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"
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 14 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 (36 miles north, up to 3.5"); Hill City (52 miles north, up to 1"); Carr (184 miles south, up to 0.75").
These maps are stills from Hot Springs's Jul 31, 2026 storm. In the Overview app the same surfaces are live — radar updating in real time, radar-estimated hail size as it forms, and NWS spotter reports pinned where they're filed — with a radar replay you can scrub back over any past day.
What people on the ground reported
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
Read from the arrival times and locations of the NOAA ground reports,
not a radar-measured storm track.
How the storm moved
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.
What 4" hail means for Hot Springs roofs
Two-inch-plus hail punctures shingles, breaks skylights and windows, and dents anything soft. In the core of a footprint like this, close to every roof is a candidate for an insurance claim. Speed decides who writes those jobs.
What this storm is worth to a roofer
$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
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.
Track hail over Hot Springs on the live map
Radar updates in real time, spotter reports appear on the map as they're filed, and the full Hot Springs storm history — this Jul 31, 2026 storm included — sits underneath. When you're ready, draw this storm's footprint and pull highly accurate homeowner contact information for every address inside it.
Highly accurate contact information starting at $0.23 per address — every contact included. Digital leads cost $15–$40. Start with a 7-day free trial — no credit card required. See pricing
Hot Springs hail history
← All hail in Hot Springs 14 recorded storm days in Hot Springs, SD
Other storms in Hot Springs
Jul 28, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed 
Jul 7, 2026
4" Signatures 4" Estimated 2.75"
1
ground report 
Jul 6, 2026
2.5" Signatures 2.5" Estimated 1.5"
No ground reports filed 
Jul 3, 2026
2.25" Signatures 2.25" Estimated 1"
No ground reports filed 
Jun 28, 2026
1" Signatures 1" Estimated 0.75"
No ground reports filed 
Jun 27, 2026
2" Signatures 2" Estimated 1.25"
1
ground report 
Jun 26, 2026
1.75" Signatures 1.75" Estimated 1.25"
2
ground reports 
Jun 22, 2026
1" Estimated 1"
1
ground report 
Jun 21, 2026
0.5" Estimated 0.5"
No ground reports filed 
Jun 6, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed 
Jun 4, 2026
Jun 2, 2026
1.25" Signatures 1.25" Estimated 0.75"
No ground reports filed 
May 30, 2026
2" Signatures 2" Estimated 1"
No ground reports filed
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 surfaces are detections and estimates,
not confirmed damage. Last updated Aug 3, 2026.