Hail in Grand Valley · Sep 1, 2026
The estimated-size surface reached 0.75" aloft; NEXRAD logged no point detections over Grand Valley that day. Open it on the live map to see the swath over the streets.
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Convective day · Sep 1, 2026 · noon–noon UTC
Severity
The most severe storm Grand Valley 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
- 58 /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 Grand Valley saw the hail — from two instruments
Two instruments, one storm: NEXRAD logs the point signatures it detected overhead, while the estimated-size surface models how large the hail aloft could have grown. Agreement between them is not guaranteed — the gaps are where the model ran ahead of, or behind, the detections.
Estimated size field Radar-estimated maximum hail size across the swath, modeled from radar aloft. It reflects the biggest stone the storm could support, which may differ from what actually fell.
Only the radar-estimated size surface resolved for Sep 1, 2026 — this storm produced no NEXRAD point detections over Grand Valley, so there is one map to show, not two.
The storm in context
Where Sep 1, 2026 sits in Grand Valley's hail record.
This was Grand Valley's 2nd recorded hail day, arriving 45 days after the Jul 18, 2026 storm. By severity it ranks 1st of the 2 storms we have logged here. Radar put the day's largest stone over Grand Valley at 0.75" — radar-estimated size aloft.
The Sep 1, 2026 convective day was bigger than Grand Valley: the same system put hail over 362 other tracked cities, 80 of them in Pennsylvania. Nearest: Spring Creek (7 miles north, up to 0.75"); Pleasantville (14 miles south, up to 0.5"); Titusville (15 miles southwest, up to 0.75").
These maps are stills. In the app this date is one of 2 Grand Valley 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 Grand Valley 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.
Near the severe threshold
What 0.75" hail means for Grand Valley 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
$9.4M
Potential roof exposure — 787 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 787 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 $165 on top of the $150 plan.
Grand Valley hail history
Other storms in Grand Valley.
Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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