Hail in Roy · Sep 6, 2026
The estimated-size surface reached 2.5" aloft; NEXRAD logged no point detections over Roy that day. At 2.5" — baseball — 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 most severe storm Roy 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
- 63 /100
- Homes exposed
- 49 /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 Roy 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.
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.
Only the radar-estimated size surface resolved for Sep 6, 2026 — this storm produced no NEXRAD point detections over Roy, so there is one map to show, not two.
The storm in context
Where Sep 6, 2026 sits in Roy's hail record.
This was Roy's 5th recorded hail day, arriving 19 days after the Aug 18, 2026 storm. By severity it ranks 1st of the 5 storms we have logged here. Radar put the day's largest stone over Roy at 2.5" — radar-estimated size aloft.
The Sep 6, 2026 convective day was bigger than Roy: the same system put hail over 608 other tracked cities, 49 of them in Montana. Nearest: Hilger (19 miles west, up to 2.75"); Winifred (21 miles northwest, up to 2.5"); Grass Range (27 miles southeast, up to 0.75").
These maps are stills. In the app this date is one of 5 Roy 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.
The National Weather Service logged no spotter reports for this storm over Roy. That absence is ordinary — filing a report takes a person on the spot who saw the hail and phoned it in. What stands as the record for this date is the radar above, which caught the storm regardless.
Severe hail signal
What 2.5" hail means for Roy 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
$3.3M
Potential roof exposure — 273 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 273 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 $57 on top of the $150 plan.
Estimated-size surface Aug 18, 2026
0.75"
Estimated-size surface Jun 7, 2026
1.25"
Estimated-size surface May 29, 2026
1.75"
Estimated-size surface May 13, 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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