Wind gust 58 mph
1 W Mccandless Townshi Allegheny County
“Mesonet station GW3644 Pittsburgh. (PBZ)”
— NOAA / SPC storm report
/ Storm field report · Allegheny
Hail in Sewickley · Sep 3, 2026
Hit 9 days ago
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Sewickley that day. Open it on the live map to see the swath over the streets.
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Peak hail signal 0.5" ≈ pea to penny · radar-estimated size aloft
Homes in the hail footprint 3,878
Ground reports 1 1 wind
Radar surfaces 1 Estimated size only
Convective day · Sep 3, 2026 · noon–noon UTC
Severity
The 2nd most severe storm Sewickley has seen in the last 12 months
Composite score · 2.8 / 10
Storm severity score
Overview's storm severity score weighs hailstone size, homes in the footprint, and ground-truth reports.
2.8 /10
- Peak hail signal
- 13 /100
- Homes exposed
- 72 /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 Sewickley saw the hail — from two instruments
Sep 3, 2026 · Sewickley, PA
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.
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
0.5"
Only the radar-estimated size surface resolved for Sep 3, 2026 — this storm produced no NEXRAD point detections over Sewickley, so there is one map to show, not two.
The storm in context
Where Sep 3, 2026 sits in Sewickley's hail record.
This was Sewickley's 2nd recorded hail day, arriving 113 days after the May 13, 2026 storm. By severity it ranks 2nd of the 2 storms we have logged here. Radar put the day's largest stone over Sewickley at 0.5" — radar-estimated size aloft.
The Sep 3, 2026 convective day was bigger than Sewickley: the same system put hail over 494 other tracked cities, 54 of them in Pennsylvania. Nearest: Cranberry Township (7 miles north, up to 0.5"); Allison Park (8 miles east, up to 0.75"); Freedom (9 miles northwest, up to 0.5").
These maps are stills. In the app this date is one of 2 Sewickley 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 Mccandless Townshi — beyond Sewickley itself.
Below the severe threshold
What 0.5" hail means for Sewickley roofs.
Radar signals under three-quarters of an inch stay below the National Weather Service severe threshold and generally indicate lower roof risk. Older or already-worn materials can still show effects, but radar alone cannot determine whether a specific roof was damaged.
Radar reading · not confirmed damage
Roofing exposure
What this storm is worth to a roofer.
3,878 homes × $12,000 avg. claim
Potential roof exposure
$47M
Potential roof exposure — 3,878 homes × the ~$12,000 industry-average hail roof claim. Exposure, not confirmed damage.
- Illustrative jobs
- 19 jobs
- Illustrative work
- ~$285K
Close just 0.5% of the 3,878 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 $814 on top of the $150 plan.
Sewickley hail history
Other storms in Sewickley.
2 recorded storm days in Sewickley, PA
Take your next area into the field.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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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 4, 2026.