Hail in Sparta · Sep 1, 2026
The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Sparta that day. Open it on the live map to see the swath over the streets.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.
Convective day · Sep 1, 2026 · noon–noon UTC
Severity
The 6th most severe storm Sparta 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
- 19 /100
- Homes exposed
- 75 /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 Sparta saw the hail — from two instruments
The maps here read the same storm from two angles — point detections from NEXRAD, and modeled hail size aloft. Where the two disagree is informative: it marks where estimated size outran the signatures, or trailed them.
Estimated size field The modeled maximum hail size across the swath, derived from radar aloft — the largest stone the storm could have supported, which is not necessarily what reached the ground.
Only the radar-estimated size surface resolved for Sep 1, 2026 — this storm produced no NEXRAD point detections over Sparta, so there is one map to show, not two.
The storm in context
Where Sep 1, 2026 sits in Sparta's hail record.
This was Sparta's 13th recorded hail day, arriving 11 days after the Aug 21, 2026 storm. By severity it ranks 6th of the 13 storms we have logged here. Radar put the day's largest stone over Sparta at 0.75" — radar-estimated size aloft.
The Sep 1, 2026 convective day was bigger than Sparta: the same system put hail over 362 other tracked cities, 39 of them in Wisconsin. Nearest: Bangor (12 miles southwest, up to 0.75"); Norwalk (12 miles southeast, up to 0.5"); Tomah (16 miles southeast, up to 0.5").
These maps are stills. In the app this date is one of 13 Sparta 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 Sparta 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.
Near the severe threshold
What 0.75" hail means for Sparta roofs.
A signal this size sits near the National Weather Service severe threshold. Aging shingles and soft metals such as vents, flashing, and gutters may be more vulnerable; roof age, wind, and material condition all matter, and only an inspection can confirm damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
Potential roof exposure
$67M
Potential roof exposure — 5,618 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 28 jobs
- Illustrative work
- ~$420K
Close just 0.5% of the 5,618 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 $1,180 on top of the $150 plan.
Sparta hail history
Other storms in Sparta.
Estimated-size surface Aug 21, 2026
0.5"
Estimated-size surface Aug 18, 2026
0.5"
Estimated-size surface Aug 9, 2026
0.75"
Estimated-size surface Jul 1, 2026
1"
Estimated-size surface Jun 30, 2026
1.25"
Estimated-size surface Jun 5, 2026
1"
Estimated-size surface May 17, 2026
Estimated-size surface Apr 23, 2026
1"
Estimated-size surface Apr 17, 2026
1"
Estimated-size surface Apr 13, 2026
1"
Estimated-size surface Mar 31, 2026
1.75"
Estimated-size surface Mar 30, 2026
1.75"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
7-day free trial in the iPhone app. No card required to start.
For iPhone. Android coming soon.
Web trial: 7 days free. Card required. $150/month after the trial unless cancelled.