University of Florida Geography Professor James Elsner posted an interesting .gif animation on his blog recently. It shows the approximate area of all U.S. tornadoes by year from 1950-2011, using a red circle centered on Oklahoma City as a point of reference:
I didn't choose 1988 for any particular reason, it just happened to be the year that was up on the rotation when I took the screen shot. To view James' blog post with the full .gif animation, please go here.
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