And up to 20% of supercells spawn tornadoes. Now, you can find these conditions elsewhere in the world. Markowski: Anywhere where you can find warm water that's equator-ward of some area that also ...

But back on May 13, 2013, the El Reno tornado took the cake for being the widest tornado ever record. At its widest point, this monster stretched over a whopping 2.6 miles. For reference, that ...