What is a shelf cloud? A shelf cloud can appear on the line of a series of storms, similar to what Des Moines saw Tuesday morning, said Dylan Dodson, a meteorologist with the National Weather Service.

Heavy rain caused flooding issues in Ames and rotation was observed in clouds around the Iowa Speedway in Newton while the area was under a tornado warning. Fans sheltered in place ahead of the Sukup ...

A potent line of thunderstorms crossed Iowa Monday night into Tuesday morning. This line was at its strongest in far northwest Iowa, where wind gusts approached 100 mph and caused widespread tree ...

Severe weather including high winds Friday, July 11 dumped enough rain in parts of Southwest Wisconsin to change the year’s ...

A wall cloud and cloud rotation could be seen just north of the track, with additional rotation spotted to the south.

A wall cloud and cloud rotation could be seen just north of the track, with additional rotation spotted to the south. According to a race official, a tornado touched down 1.5 miles from Iowa Speedway.

Shelf clouds are usually confused with wall clouds. Wall clouds develop under supercells which consist of storms that are rotating. Wall clouds can be a precursor to tornadoes.