John Nelson used 56 years worth of NOAA data to create a beautiful map of the most powerful tornadoes of the past five-plus decades.
Got this data from NOAA via the spectacular Data.gov. It tracks 56 years of tornado paths along with a host of attribute information. Here, the tracks are categorized by their F-Scale (which isn't the latest and greatest means but good enough for a hack like me), where brighter strokes represent more violent storms.
This is yet another example of the power of data visualization.
Hat tip: BadBlue.com/tech.