Tornado Graph Added

I've added a graph from the Storm Prediction Center to the site. The graph shows the running total of yearly tornadoes, plotted for the past 5 years. The image above is static, but the graph in the left side bar will update as SPC adds data.

There is an apparent trend from year to year that can be observed. However it is important to note that the tornado count is from local storm reports and is only preliminary data. There will always be an increase in tornado reports as the population increases, technology advances, and as an overall interest in severe weather increases. When the linear trend from the 1954-2007 tornado counts was adjusted for this inflation, the upward trend was removed. Read this page for more info on tornado report inflation: http://w1.spc.woc.noaa.gov/wcm/adj.html.