Philadelphia Hail Map — Last 30 SPC Reporting Days
Monitor real-time hail activity and storm damage across Philadelphia, from Center City to the Main Line and surrounding Delaware Valley neighborhoods. Our interactive map helps property owners and contractors identify areas impacted by severe weather. This page shows live NOAA/SPC hail reports for Philadelphia in the last 30 days.
About hail reports in Philadelphia
While Philadelphia sees fewer severe hail events than the Midwest, spring and summer thunderstorms frequently bring damaging winds and occasional large hail to the Delaware Valley. Notable events, such as the severe storms in May 2014 and June 2020, have produced quarter-sized hail that caused localized property and vehicle damage. Peak severe weather season typically runs from May through August, driven by hot, humid air masses colliding with cold fronts.
This Philadelphia area research page connects reported NOAA/SPC hail activity with THOR’s interactive map. Use the map to investigate a place, ZIP code, county, address, or storm area alongside available hail swaths, NEXRAD radar, and Timeline replay.
From hail research to field work
- Open the interactive map and review reported hail in the selected area.
- Compare the broader storm corridor with radar, hail swaths, and Timeline replay.
- Use Market Priority, Impact View, and map layers to focus the next area.
- Save the investigation as a property report, lead workflow, alert, or export.
Places to research around Philadelphia
- Upper Darby
- King of Prussia
- Norristown
- Bensalem
- Chester
Data and method
THOR uses preliminary NOAA Storm Prediction Center reports as a starting point for local hail research. Reports can be revised or incomplete, so use the interactive map and available radar context to investigate the broader storm picture.
Related hail maps
Hail map questions
What is a hail swath map?
A hail swath is a radar-derived estimate of where a hail-producing storm cell traveled. THOR places swaths beside reported hail events, radar, and Timeline replay so you can study the full storm corridor.
Can I check hail history by address?
Yes. THOR searches by address, ZIP code, county, or place and creates Property Storm History reports that stay in My Reports for reopening, sharing, or browser PDF export.
Can roofing teams use THOR for canvassing?
Yes. THOR includes built-in canvassing with map pins, imported leads, statuses, notes, call and drive actions, follow-up dates, Storm Hits, Lead Storm Monitor, and exportable storm data.
How does THOR help prioritize storm damage work?
Market Priority compares the storm events already on the map with household, residential-density, population, and Residential Score context. Impact View, Heat Grid, and Timeline help the team sort the broader storm picture before field follow-up.
Build the next storm workflow
THOR combines nationwide hail research with storm replay, mapping, reports, alerts, canvassing, lead follow-up, and exports in one workspace.