IndyCar driver Nolan Siegel was not cleared to race at Iowa Speedway because of a mild concussion suffered in a crash Saturday.

IndyCar Medical has not cleared Arrow McLaren driver Nolan Siegel to compete in Sunday's Farm To Finish 275 at Iowa Speedway after he crashed in Saturday's Synk 275.

Pato O'Ward's win at Iowa Speedway was the closest IndyCar finish at Iowa Speedway since 2007 under green flag conditions.

The IndyCar Series is at Iowa for a doubleheader weekend for two 275-lap races on the 7/8-mile short oval: Qualifying results, starting grid.

Chad Hahn, warning coordination meteorologist at the National Weather Service, also confirmed a tornado did not touch down in Newton or Jasper County. He said there was a strong rotating wall cloud on the storm, which along with the rotation identified on radar prompted the tornado warning.

"It saved me a headache." IndyCar's aeroscreen was tested for the first time in race at Iowa Speedway five years ago.

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

Myles Rowe made history in addition to his personal victory this weekend at the Iowa Speedway. The driver for Abel Motorsports with Force Indy finished the Newton oval with his first win for Indy NXT after starting the race in fourth, also making him the first Black driver to win series.

Heavy rain caused flooding issues in Ames and rotation was observed in clouds around the Iowa Speedway in Newton as the area was under a tornado warning. All watches and warnings have expired for central Iowa, but major flooding continues in some eastern Iowa communities after heavy rain and possible tornadoes.