Tornadoes don't just appear out of nowhere. They need the perfect storm to form. It starts when warm, humid air clashes with cold air, which can generate a powerful thunderstorm known as a supercell.

Tornadoes are one of the most violent and destructive forces on Earth reaching speeds in excess of 200 miles per hour. Sometimes, tornadoes can clear a path a mile wide and travel more than 50 miles.

Tornadoes don't just appear out of nowhere. They need the perfect storm to form. It starts when warm, humid air clashes with cold air, which can generate a powerful thunderstorm known as a supercell.

After the Clark Mills tornado, parents face difficult talks about loss and future storms. Here's some helpful advice and tips ...

There were 29 tornadoes in Ohio on July 12, 1992, and 19 on Nov. 10, 2002, the most of any day since 1950. There were 61 tornadoes in 1992, the most since 1950 until Ohio broke its tornado record ...

Over the stunning tornado’s entire lifetime, it only traveled 3.02 miles. It ambled along at 4 mph — barely walking pace.