It's not every day you see one of the most violent tornadoes in recent history and a historic flash flood happen just over ...

From following a tornado with a drone to tracking the path of a hurricane, we are always trying to better understand our ...

While the F- (and EF-) scale used for tornadoes top out at F5, the scale technically went all the way up to F12. That’s Mach 1 speed (738 miles per hour).

Tornadoes assigned an EF5/F5 rating have historically been rare, but when they do strike, the damage in the affected communities is devastating.

This remains South Dakota's only tornado rated either F5 or EF5, the highest rating for tornado damage. Less than 200 miles away that same day, heavy snow fell in western South Dakota.

Seventeen years later, another F5 tornado tore through Lubbock, Texas, after sunset on May 11, 1970. Twenty six were killed and over 1,500 were injured on this violent tornado's 8 to 9-mile long path.

The Great Tri-State Tornado, the longest tracked F5 tornado in U.S. history, devastated Southeast Missouri, Illinois, and Southwest Indiana on March 18, 1925, leaving a trail of destruction and ...

The last tornado to have an EF5 damage rating occurred in Moore, Oklahoma, on May 20, 2013. Prior to that devastating twister, the U.S. had a half-dozen EF5-rated tornadoes in spring 2011.

This remains South Dakota's only tornado rated either F5 or EF5, the highest rating for tornado damage. Advertisement Less than 200 miles away that same day, heavy snow fell in western South Dakota.