Hail in Groton · Jul 24, 2026
NEXRAD logged 0 hail signatures up to 1.75"; the estimated-size surface reached 1.5" aloft. Open it on the live map to see the swath over the streets.
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Convective day · Jul 24, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Groton has seen in the last 12 months
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
- Peak hail signal
- 44 /100
- Homes exposed
- 53 /100
- Ground truth
- 0 /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 Groton saw the hail — from two instruments
Each storm gets two readings: the radar signatures NEXRAD recorded as the cells passed overhead, and a modeled estimate of hail size in the air. They are independent surfaces, so a mismatch between them is expected — and worth reading.
Radar signature field The point detections NEXRAD recorded overhead. Each signature marks where the radar saw hail aloft — it is a detection, not a stone measured on the ground.
Estimated size field Radar-estimated hail size over the swath. The model reports the biggest stone the storm could sustain in the air; what actually fell may have been smaller.
The storm in context
Where Jul 24, 2026 sits in Groton's hail record.
This was Groton's 4th recorded hail day, arriving 17 days after the Jul 7, 2026 storm. By severity it ranks 3rd of the 6 storms we have logged here. Radar put the day's largest stone over Groton at 1.75" — the largest NEXRAD radar signature.
The Jul 24, 2026 convective day was bigger than Groton: the same system put hail over 221 other tracked cities, 13 of them in South Dakota. Nearest: Columbia (8 miles northwest, up to 2.5"); Bath (8 miles southwest, up to 1.75"); Westport (20 miles west, up to 4").
These maps are stills. In the app this date is one of 6 Groton 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
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.
Nobody on the ground filed a report over Groton for this date, which says more about who was watching than about the storm: spotter reports only exist where there is an observer. The radar surfaces above carry the evidence for this one.
High damage potential
What 1.75" hail means for Groton roofs.
Hail around an inch and a half is capable of cracking shingles, stripping granules, and denting gutters, vents, and siding. Risk is usually greatest near the strongest radar signal, but property-level damage still requires an on-site inspection.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$5.6M
Potential roof exposure — 465 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 2 jobs
- Illustrative work
- ~$30K
Close just 0.5% of the 465 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 $98 on top of the $150 plan.
Groton hail history
Other storms in Groton.
Estimated-size surface Aug 24, 2026
0.5"
Estimated-size surface Jul 25, 2026
Estimated-size surface Jul 7, 2026
1.75"
Estimated-size surface Jun 29, 2026
2"
Estimated-size surface May 31, 2026
1"The next storm won’t wait for you.
Set your territory and alerts today. When hail hits, use Overview to choose your streets and get moving.
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Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.