Hail size 1.25"
Niobrara Knox County
“Report of quarters with half dollars at the corner of Walnut Street and Spruce Avenue. (OAX)”
— NOAA / SPC storm report
/ Storm field report · Bon Homme
Hail in Springfield · Sep 1, 2026
Hit 11 days ago
The estimated-size surface reached 4" aloft; NEXRAD logged no point detections over Springfield that day. 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 · radar-estimated size aloft
Homes in the hail footprint 3,227
Ground reports 7 6 hail · 1 wind
Radar surfaces 1 Estimated size only
Convective day · Sep 1, 2026 · noon–noon UTC
Severity
The most severe storm Springfield has seen in the last 12 months
Composite score · 9.3 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
9.3 /10
- Peak hail signal
- 100 /100
- Homes exposed
- 70 /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 Springfield saw the hail — from two instruments
Sep 1, 2026 · Springfield, 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.
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
4"
Only the radar-estimated size surface resolved for Sep 1, 2026 — this storm produced no NEXRAD point detections over Springfield, so there is one map to show, not two.
The storm in context
Where Sep 1, 2026 sits in Springfield's hail record.
This was Springfield's 5th recorded hail day, arriving 9 days after the Aug 23, 2026 storm. By severity it ranks 1st of the 6 storms we have logged here. Radar put the day's largest stone over Springfield at 4" — radar-estimated size aloft.
The Sep 1, 2026 convective day was bigger than Springfield: the same system put hail over 362 other tracked cities, 42 of them in South Dakota. Nearest: Tabor (6 miles northeast, up to 2.75"); Tyndall (7 miles north, up to 1.75"); Lesterville (12 miles northeast, up to 0.5").
These maps are stills. In the app this date is one of 6 Springfield 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
7 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 2.75"
Niobrara Knox County
“Report of baseball size hail resulting in vehicle with broken windshield in Niobrara... relayed by EM via NWSChat. Time estimated from radar. (OAX)”
— NOAA / SPC storm report
Hail size 1"
7 SW Springfield Bon Homme County
“Wind driven hail broke two windows out of business. (FSD)”
— NOAA / SPC storm report
Hail size 1"
2 WSW Niobrara Knox County
“Report of nickels with a few quarters mixed in. (OAX)”
— NOAA / SPC storm report
Hail size 1.75"
Santee Knox County
“Public report of various hail sizes with largest around golf ball size. Time estimated via radar. (OAX)”
— NOAA / SPC storm report
Hail size 2"
8 WSW Springfield Bon Homme County
“Window broken out. Hail lessening at 745 pm. (FSD)”
— NOAA / SPC storm report
Wind reports
1 report Wind gust 61 mph
Springfield Bon Homme County
“Measured by personal weather station. (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 17 minutes, from to .
Reports came from Niobrara and Santee — beyond Springfield itself.
Severe hail signal
What 4" hail means for Springfield 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.
3,227 homes × $12,000 avg. claim
Potential roof exposure
$39M
Potential roof exposure — 3,227 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 16 jobs
- Illustrative work
- ~$240K
Close just 0.5% of the 3,227 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 $678 on top of the $150 plan.
Springfield hail history
Other storms in Springfield.
6 recorded storm days in Springfield, SD
Estimated-size surface Storm date Springfield / SD
Sep 5, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Springfield / SD
Aug 23, 2026
0.75" Estimated 0.75"
No ground reports filed Open report →
Estimated-size surface Storm date Springfield / SD
Jun 30, 2026
1" Signatures 1" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Springfield / SD
Jun 27, 2026
No ground reports filed Open report →
Estimated-size surface Storm date Springfield / SD
May 17, 2026
3.25" Signatures 3.25" Estimated 2"
No ground reports filed Open report →
Take your next area into the field.
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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 6, 2026.