Hail in Roundup · Sep 6, 2026
The estimated-size surface reached 2" aloft; NEXRAD logged no point detections over Roundup that day. At 2" — tennis ball — 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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Convective day · Sep 6, 2026 · noon–noon UTC
Severity
The 4th most severe storm Roundup 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
- 50 /100
- Homes exposed
- 47 /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 Roundup saw the hail — from two instruments
We map this storm two ways: the NEXRAD radar signatures the storm produced overhead, and the radar-estimated size of the hail in the air. The two surfaces don’t have to match — where they diverge is where estimated size aloft ran ahead of, or behind, what the signatures caught.
Estimated size field Maximum hail size as estimated from radar aloft. Treat it as the storm's ceiling — the largest supportable stone — rather than a ground measurement.
Only the radar-estimated size surface resolved for Sep 6, 2026 — this storm produced no NEXRAD point detections over Roundup, so there is one map to show, not two.
The storm in context
Where Sep 6, 2026 sits in Roundup's hail record.
This was Roundup's 11th recorded hail day, arriving 20 days after the Aug 17, 2026 storm. By severity it ranks 4th of the 11 storms we have logged here. Radar put the day's largest stone over Roundup at 2" — radar-estimated size aloft.
The Sep 6, 2026 convective day was bigger than Roundup: the same system put hail over 608 other tracked cities, 49 of them in Montana. Nearest: Shepherd (24 miles south, up to 2.25"); Broadview (28 miles southwest, up to 0.5"); Worden (32 miles southeast, up to 1.25").
These maps are stills. In the app this date is one of 11 Roundup 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 Roundup 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.
Severe hail signal
What 2" hail means for Roundup 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.
Potential roof exposure
$2.6M
Potential roof exposure — 220 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 220 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 $46 on top of the $150 plan.
Roundup hail history
Other storms in Roundup.
Estimated-size surface Aug 17, 2026
0.5"
Estimated-size surface Jul 17, 2026
0.75"
Estimated-size surface Jul 16, 2026
1.5"
Estimated-size surface Jul 14, 2026
1.5"
Estimated-size surface Jul 7, 2026
2.5"
Estimated-size surface Jul 5, 2026
2"
Estimated-size surface Jul 3, 2026
0.5"
Estimated-size surface Jun 27, 2026
0.75"
Estimated-size surface Jun 7, 2026
1.25"
Estimated-size surface May 29, 2026
1"Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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