California Hail Map — Last 30 SPC Reporting Days
California experiences varied severe weather, with hail occasionally impacting the Central Valley, Sierra Nevada foothills, and inland Southern California. Monitor recent storm activity and potential crop or property damage across the Golden State. This page shows live NOAA/SPC hail reports for California in the last 30 days.
About hail reports in California
While not in Tornado Alley, California averages about 10-15 days with severe hail annually, primarily during winter and spring frontal systems or summer monsoonal thunderstorms in the mountains and deserts. Notable events, like the October 2010 supercell in the Central Valley, have caused millions in agricultural and property damage. Peak hail activity often aligns with atmospheric river events or localized convective storms.
This California statewide 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 California
- Sacramento
- Fresno
- Bakersfield
- Los Angeles
- San Diego
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.
Hail maps in California cities
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.