Wind gust 63 mph
4 WSW Johnstown Grand Forks County
“Personal weather station. (FGF)”
— NOAA / SPC storm report
/ Storm field report · Grand Forks
Hail in Gilby · Sep 3, 2026
Hit 9 days ago
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 1" aloft. 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.
Peak hail signal 1" ≈ quarter · radar-estimated size aloft
Homes in the hail footprint 759
Ground reports 1 1 wind
Radar surfaces 2 NEXRAD + estimated size
Convective day · Sep 3, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Gilby has seen in the last 12 months
Composite score · 3.2 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
3.2 /10
- Peak hail signal
- 25 /100
- Homes exposed
- 58 /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 Gilby saw the hail — from two instruments
Sep 3, 2026 · Gilby, ND
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.
NEXRAD radar signatures Surface resolved
Radar signature field NEXRAD radar signatures — the point detections the storm produced overhead. A signature is where the radar saw hail, not a confirmed stone on the ground.
Max size
0"
Detections
0
Radar-estimated hail size Surface resolved
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.
Max size
1"
The storm in context
Where Sep 3, 2026 sits in Gilby's hail record.
This was Gilby's 5th recorded hail day, arriving 10 days after the Aug 24, 2026 storm. By severity it ranks 2nd of the 6 storms we have logged here. Radar put the day's largest stone over Gilby at 1" — radar-estimated size aloft.
The Sep 3, 2026 convective day was bigger than Gilby: the same system put hail over 494 other tracked cities, 65 of them in North Dakota. Nearest: Inkster (5 miles west, up to 1"); Larimore (8 miles southwest, up to 1"); Forest River (8 miles northeast, up to 1").
These maps are stills. In the app this date is one of 6 Gilby 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.
Wind 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 Johnstown — beyond Gilby itself.
Damage-capable hail signal
What 1" hail means for Gilby 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.
759 homes × $12,000 avg. claim
Potential roof exposure
$9.1M
Potential roof exposure — 759 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 4 jobs
- Illustrative work
- ~$60K
Close just 0.5% of the 759 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 $159 on top of the $150 plan.
Estimated-size surface Storm date Gilby / ND
Sep 6, 2026
0.5" Estimated 0.5"
No ground reports filed Open report →
Estimated-size surface Storm date Gilby / ND
Aug 24, 2026
1" Estimated 1"
No ground reports filed Open report →
Estimated-size surface Storm date Gilby / ND
Aug 2, 2026
1.25" Estimated 1.25"
No ground reports filed Open report →
Estimated-size surface Storm date Gilby / ND
Jul 24, 2026
2.5" Signatures 2.5" Estimated 1.5"
2 ground reports Open report →
Estimated-size surface Storm date Gilby / ND
Jun 29, 2026
1.25" Signatures 1" Estimated 1.25"
No ground reports filed Open report →
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.
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 7, 2026.