US county hail map
Pick a measure, read the map, then download or embed it. 3,026 counties.
An interactive county map of hail across the lower 48, coloured by reports, largest stone or the share of damaging hail, and free to download or embed.
What the map shows, and what it cannot
Colours are quintiles of the chosen measure across every county with a report, so the darkest fifth of counties always looks the same whatever the underlying numbers are. That makes the pattern readable and the absolute values easy to misread: hover any county for its actual figure, and use the CSV if you need the numbers.
Three honest caveats. Reports track people. A storm over a city produces dozens of reports; the same storm over open ranch land may produce none, so the map partly shows where people live and drive. Hail swaths are narrow. A county can be 900 square miles, and a single supercell may cross only a corner of it. The map covers the lower 48. Alaska, Hawaii and the territories appear in the data and the CSV, but they are outside this projection and so are not drawn.
For the full method, including how sizes are estimated and why a decade is the right window, see methodology. The underlying aggregate is on the data page.
Embedding the map
Copy the embed code above and paste it into a blog post, a report or a lesson plan. The iframe loads one small page and one map file, sets no cookies, and runs no third-party scripts. You are welcome to use it commercially; the underlying NOAA data is public domain. A link back is appreciated and not required.
If you need the map as a static image, download the SVG: it is a plain vector file that opens in Illustrator, Figma or Inkscape and scales to any size without blurring.