Nicholas Snider talks with an expert about how they form and what impacts the strength and intensity of tornadoes.

Meteorologists Tom Trtan and Tom Schmidt discuss the formation of tornadoes and why fall is considered severe weather's ...

Videos of Torch Lake's tornado in northwest Michigan are circulating online. See what weather officials say and a video of the entrancing spout.

Preliminary reports for the pair of Utah tornadoes currently rank them as level EF2, the same as the tornado that tore through Salt Lake City in 1999.