Saint Louis Hail Map — Last 30 SPC Reporting Days
Explore the latest hail activity and storm damage reports across Saint Louis, from downtown to the surrounding St. Louis County suburbs. Our interactive map provides precise tracking of severe weather systems impacting the Gateway City. This page shows live NOAA/SPC hail reports for Saint Louis in the last 30 days.
About hail reports in Saint Louis
Saint Louis experiences a high frequency of severe thunderstorms, particularly during the peak spring season from April to June. The city has seen historic hail events, such as the devastating April 2012 storm that dropped baseball-sized hail and caused hundreds of millions in damage across the metro area. Local meteorological drivers include the collision of warm, moist air from the Gulf of Mexico with cold fronts sweeping across the Midwest.
This Saint Louis 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 Saint Louis
- Chesterfield
- St. Charles
- Florissant
- O'Fallon
- Kirkwood
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.