56 Years of Tornado Tracks

For the storm chasers (and streamchasers) out there- here is IDV's map of tornado tracks across the US using freely available information from data.gov. Each streak connects tornado's touchdown and lift-off location (the actual tornadoes meandered around a bit more than is shown here). The brightness is how violent it was. There is also a high resolution version.

Tornado tracks

The National Weather Service also has plenty more visualizations of this tornado data including maps of the tornadoes that happened in each year. It would be interesting to animate this like has been done with paths of airplane flights.