Hail history for a list of addresses
Upload a CSV and get back a CSV with the radar hail history and nearby tornado tracks for every row.
Radar estimates, not proof. Hail sizes come from radar and are estimates. They are not proof of damage and are not for insurance claims or legal use.
Your file
The first row must be a header row. Use either of these:
- Columns named lat and lon (latitude, longitude, lng and long also work).
- A column named address (street also works), ideally with city, state and zip columns. Without those, put the city and state in the address, such as 1500 Marilla St, Dallas, TX.
What comes back
One row per input row, in the same order, with these columns: input address, matched address, lat, lon, storms of 1 inch or larger, largest radar inches, date of largest, most recent storm date, storms confirmed within 5 miles, tornado tracks within 5 miles, and a note.
- Storm counts, the largest size and the dates only count radar estimates of 1 inch or larger since October 2020. A storm is confirmed when a hail report of 0.75 inch or more was logged within 5 miles on the same storm day.
- Tornado tracks within 5 miles go back to 1950.
- Rows that cannot be checked, such as an address that did not match or a place outside the lower 48 states, are left blank with an explanation in the note column.
- Dates are in year-month-day form.
Where your data goes
Your file is read and processed in your browser. For address files, the address text is sent to the US Census geocoder through our server to get coordinates. We do not store it. With lat and lon columns, your file is not sent anywhere; your browser only downloads the public data tiles it needs. See the privacy page.