Tornado Tracks by Year, 1950 – 2011

Sourced from sixty-one years of NOAA data, tornado tracks are flip-booked through 61 years in 30 seconds.  Brightness of the track is tied to tornado severity. Check the source for high resolution visualizations by season, severity, or all together for a revealing illustration of regional risk: uxblog.idvsolutions.com/2012/05/tornado-tracks.html
These images were generated in Visual Fusion.

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