A tornado warning, replete with threatening funnel clouds, made IndyCar drivers' weekend at Iowa Speedway extra memorable.

After an afternoon filled with tornado sirens, lightning strikes, torrential rain and visible cloud rotation near Iowa ...

Severe storms and a Tornado Warning halted the IndyCar practice at Iowa Speedway Friday, sending drivers and fans scrambling ...

Visible funnel clouds near the track ensure IndyCar drivers will not be playing ‘Twister’ in practice today at the Iowa ...

Listen to the sirens going off at the track.

Drivers and teams captured photos and videos of the storm making its way through the area. IndyCar reporters said tornado ...

After an afternoon filled with tornado sirens, lightning strikes, torrential rain and visible cloud rotation near Iowa Speedway, IndyCar canceled Friday afternoon practice.

Eyewitness captures moment in which a tornado warning interrupts IndyCar practice at Iowa Speedway in Newton. Video credit: ...

IndyCar sold about 14,000 tickets for the July 12-13 doubleheader at Iowa Speedway. Will it fall off the IndyCar schedule for a second time?

Stormy weather and tornado warnings has caused IndyCar to reschedule the weekend after it was forced to cancel sessions on ...

After an afternoon filled with tornado sirens, lightning strikes, torrential rain and visible cloud rotation near Iowa Speedway, IndyCar canceled Friday afternoon practice.