America's deadly tornadoes

The twister that devastated Moore, Oklahoma, on 20 May was a tragedy for this suburban community in the heart of Tornado Alley. The US is no stranger to such disasters, as this map of the Moore tornado (red circle) and other fatal tornadoes from 1950 to 2012 reveals.

Hover over the circles, which are scaled according to the number of fatalities, to learn more about each event, and view the total death toll per year on the chart below.

Source: National Oceanic and Atmospheric Administration; graphic by Peter Aldhous, published 22 May 2013.

Deaths per tornado: