Hail size 1.5"
3 NNE Simcoe McHenry County
“Largest hail size reported. (BIS)”
— NOAA / SPC storm report
/ Storm field report · McHenry
Hail in Granville · Sep 3, 2026
Hit 9 days ago
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 1.25" aloft. Open it on the live map to see the swath over the streets.
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Peak hail signal 1.25" ≈ half-dollar · radar-estimated size aloft
Homes in the hail footprint 485
Ground reports 1 1 hail
Radar surfaces 2 NEXRAD + estimated size
Convective day · Sep 3, 2026 · noon–noon UTC
Severity
The 3rd most severe storm Granville has seen in the last 12 months
Composite score · 3.5 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.5 /10
- Peak hail signal
- 31 /100
- Homes exposed
- 54 /100
- Ground truth
- 17 /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 Granville saw the hail — from two instruments
Sep 3, 2026 · Granville, ND
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.
NEXRAD radar signatures Surface resolved
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.
Max size
0"
Detections
0
Radar-estimated hail size Surface resolved
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.
Max size
1.25"
The storm in context
Where Sep 3, 2026 sits in Granville's hail record.
This was Granville's 5th recorded hail day, arriving 1 day after the Sep 2, 2026 storm. By severity it ranks 3rd of the 6 storms we have logged here. Radar put the day's largest stone over Granville at 1.25" — radar-estimated size aloft.
The Sep 3, 2026 convective day was bigger than Granville: the same system put hail over 494 other tracked cities, 65 of them in North Dakota. Nearest: Velva (14 miles south, up to 1"); Sawyer (17 miles southwest, up to 1"); Voltaire (19 miles south, up to 1").
These maps are stills. In the app this date is one of 6 Granville 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
1 report filed with the NWS
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.
Hail reports
1 reportStorm forensics
How the storm moved
Timing and place names from NOAA ground reports
Read from the arrival times and locations of the NOAA ground reports, not a radar-measured storm track.
Reports came from Simcoe — beyond Granville itself.
Damage-capable hail signal
What 1.25" hail means for Granville roofs.
Quarter-size and larger hail can bruise asphalt mats, remove granules, and dent exposed soft metal. The mapped footprint identifies an inspection priority area — it does not identify which individual roofs, if any, sustained damage.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
485 homes × $12,000 avg. claim
Potential roof exposure
$5.8M
Potential roof exposure — 485 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 485 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 $102 on top of the $150 plan.
Granville hail history
Other storms in Granville.
6 recorded storm days in Granville, ND
Estimated-size surface Storm date Granville / ND
Sep 7, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Granville / ND
Sep 2, 2026
1.5" Estimated 1.5"
No ground reports filed Open report →
Estimated-size surface Storm date Granville / ND
Jun 29, 2026
3.5" Signatures 3.5" Estimated 2"
2 ground reports Open report →
Estimated-size surface Storm date Granville / ND
Jun 2, 2026
1" Signatures 1"
No ground reports filed Open report →
Estimated-size surface Storm date Granville / ND
Jan 2, 2026
2.25" Estimated 2.25"
No ground reports filed Open report →
Take your next area into the field.
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A storm day here is a convective day — it runs from noon to noon
UTC, so late-night hail is grouped with the afternoon storm that
spawned it rather than split across two calendar dates. Ground
reports are public-domain observations from the NOAA Storm
Prediction Center. Radar tells you where to look. Only an inspection confirms damage at an address. Last updated Sep 8, 2026.