00:48 Sioux Falls Tornado Rips Apart Building in Newly Released Footage Newly released footage from inside a health center in Sioux Falls shows the damage done by an EF-2 tornado that struck the city one year ago.

This is a previous version of our forecast article for a major tornado threat in the South on Sunday, Jan. 22, 2017. For the latest updates on this dangerous situation, see our new article at this link.

MORE ON WEATHER.COM: Severe Weather in the South, Jan. 2017 (PHOTOS)