Hail in Grassy Butte · Sep 6, 2026
The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Grassy Butte that day. 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 Grassy Butte 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
- 38 /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 Grassy Butte 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 Grassy Butte, so there is one map to show, not two.
The storm in context
Where Sep 6, 2026 sits in Grassy Butte's hail record.
This was Grassy Butte's 7th recorded hail day, arriving 4 days after the Sep 2, 2026 storm. By severity it ranks 4th of the 7 storms we have logged here. Radar put the day's largest stone over Grassy Butte at 0.75" — radar-estimated size aloft.
The Sep 6, 2026 convective day was bigger than Grassy Butte: the same system put hail over 608 other tracked cities, 69 of them in North Dakota. Nearest: Arnegard (21 miles north, up to 3"); Killdeer (21 miles east, up to 3.25"); Fairfield (22 miles south, up to 0.75").
These maps are stills. In the app this date is one of 7 Grassy Butte 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.
No ground reports were filed with the National Weather Service for this storm over Grassy Butte. That is common: a report depends on someone being there to see it and take the time to call it in. The radar surfaces above are the record here — the storm was detected from above even though no one on the ground logged it.
Near the severe threshold
What 0.75" hail means for Grassy Butte 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
$972K
Potential roof exposure — 81 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
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 $17 on top of the $150 plan.
Grassy Butte hail history
Other storms in Grassy Butte.
Estimated-size surface Sep 2, 2026
0.5"
Estimated-size surface Jul 5, 2026
1"
Estimated-size surface Jul 1, 2026
0.5"
Estimated-size surface Jun 29, 2026
1"
Estimated-size surface Jun 27, 2026
Estimated-size surface Jun 7, 2026
2.5"Take your next area into the field.
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