April 3 marks the anniversary of the catastrophic tornado outbreak of 1974, which remains one of the deadliest in the twentieth century.

Last night's severe weather kicked off a flood watch in Ohio, but tornadoes can form any time. Here's what to know about them and how they form.

If you live in Ohio, you may have woken up to thunder, heavy rain, and tornado sirens last night. Due to severe weather and rain forecasted for the rest of the week, around 55 Ohio counties remain ...