Hail in Philadelphia · Sep 7, 2026
The estimated-size surface reached 0.5" aloft; NEXRAD logged no point detections over Philadelphia that day. Open it on the live map to see the swath over the streets.
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Convective day · Sep 7, 2026 · noon–noon UTC
Severity
The 15th most severe storm Philadelphia 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
- 13 /100
- Homes exposed
- 19 /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 Philadelphia saw the hail — from two instruments
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.
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.
Only the radar-estimated size surface resolved for Sep 7, 2026 — this storm produced no NEXRAD point detections over Philadelphia, so there is one map to show, not two.
The storm in context
Where Sep 7, 2026 sits in Philadelphia's hail record.
This was Philadelphia's 15th recorded hail day, arriving 1 day after the Sep 6, 2026 storm. By severity it ranks 15th of the 15 storms we have logged here. Radar put the day's largest stone over Philadelphia at 0.5" — radar-estimated size aloft.
The Sep 7, 2026 convective day was bigger than Philadelphia: the same system put hail over 163 other tracked cities, 11 of them in Mississippi. Nearest: Moundville (105 miles east, up to 0.5"); Deer Park (107 miles southeast, up to 0.75"); Thomasville (109 miles southeast, up to 0.75").
These maps are stills. In the app this date is one of 15 Philadelphia 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 Philadelphia. 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.
Below the severe threshold
What 0.5" hail means for Philadelphia 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.
Potential roof exposure
$96K
Potential roof exposure — 8 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 $2 on top of the $150 plan.
Philadelphia hail history
Other storms in Philadelphia.
Estimated-size surface Sep 6, 2026
0.5"
Estimated-size surface Aug 20, 2026
1"
Estimated-size surface Aug 19, 2026
0.5"
NEXRAD surface Jul 31, 2026
0.75"
Estimated-size surface Jul 20, 2026
0.5"
Estimated-size surface Jul 4, 2026
1"
Estimated-size surface Jul 1, 2026
1.25"
Estimated-size surface Jun 19, 2026
0.5"
Estimated-size surface Jun 1, 2026
1.25"
Estimated-size surface May 6, 2026
4"
Estimated-size surface Apr 29, 2026
1.5"
Estimated-size surface Apr 28, 2026
1.25"
Estimated-size surface Apr 24, 2026
1"
Estimated-size surface Mar 7, 2026
1.5"Take your next area into the field.
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