Mapping Historical Tornado Data

Three Decades of Violent Storms is a graphical representation of tornado strikes over the last thirty years in the United States.


Data can be explored by year and location. You can view all recorded tornadoes from a given year by selecting it from the map sidebar. In the map sidebar, you can view information on the total number of tornadoes that occurred throughout the year, as well as the number of injuries and deaths that resulted.

us tornado map
us tornado map


Location data can be filtered by the map. When you pan and zoom the map, the map sidebar updates automatically to show only the data from the currently selected map bounds. Using the map, you can also select individual tornadoes to view their strength, length, and number of injuries and fatalities.An interactive map is also available for Tornado Tracks, 1950-2014. This map shows the paths taken by tornadoes from 1950-2014.

tornado map usa
tornado map usa


By adjusting the scale, the year range, and the number of casualties caused, the tornadoes shown on the map can be filtered. On the map, you can also select individual tornado tracks to view their strength, dates, lengths & widths, as well as the number of injuries & fatalities.The National Weather Service’s National Weather Database has visualized nine years of US tornado data. Animated data by month and year is provided by CartoDB’s Torque library.

tornado tracks
tornado tracks


This graph shows the ebb and flow of tornado frequency and distribution over the last nine years in the United States. As you can see from the map, every year tornadoes move north-west from the south-east across the country and through Tornado Alley. The map also confirms that tornadoes are most likely to strike in spring and summer.

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