About National Storms

National Storms is an independent website that turns the public US storm record into pages anyone can read and cite.

What it covers

Every hail, damaging-wind and tornado report the NOAA Storm Prediction Center has logged since 1955, and NOAA radar hail estimates since October 2019. You can browse it two ways:

• By storm day: what was reported on a given day, where the largest hail fell and how many people lived inside the radar-estimated swath.
• By place: how often hail has been reported near a state, county or city, the largest stones on record and the most recent storms.

Who runs it

National Storms is an independent project. It is not a government website and is not affiliated with NOAA, the National Weather Service or the Storm Prediction Center. Address-level data is never published on public pages.

Sources and accuracy

All underlying data is public. The methodology & sources page lists every source, how we process it and where it falls short. Results are radar-estimated or reported near a place; they are not damage assessments. Read the disclaimer before relying on any page.

Quoting and citing

You are welcome to quote and cite any page (see data for journalists). Each page ends with a citation line that includes the date the data runs through. The underlying NOAA and Census data is public domain; please credit National Storms for our counts, maps and swath figures.