Hail in Philadelphia · Sep 6, 2026
NEXRAD logged 0 hail signatures up to 0"; the estimated-size surface reached 0.5" aloft. Open it on the live map to see the swath over the streets.
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Convective day · Sep 6, 2026 · noon–noon UTC
Severity
The 11th 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
- 57 /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
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.
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.
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.
The storm in context
Where Sep 6, 2026 sits in Philadelphia's hail record.
This was Philadelphia's 14th recorded hail day, arriving 17 days after the Aug 20, 2026 storm. By severity it ranks 11th 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 6, 2026 convective day was bigger than Philadelphia: the same system put hail over 608 other tracked cities, 35 of them in Mississippi. Nearest: Lena (14 miles southwest, up to 0.5"); Preston (27 miles northeast, up to 1"); Forest (30 miles southwest, up to 0.5").
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.
The National Weather Service logged no spotter reports for this storm over Philadelphia. That absence is ordinary — filing a report takes a person on the spot who saw the hail and phoned it in. What stands as the record for this date is the radar above, which caught the storm regardless.
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
$8.7M
Potential roof exposure — 726 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 726 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 $152 on top of the $150 plan.
Philadelphia hail history
Other storms in Philadelphia.
Estimated-size surface Sep 7, 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.
See the hail, review your recommendations, and canvass with Overview on iPhone.
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