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.

At a Glance An outbreak of tornadoes and flash flooding is expected on Monday.

Strong tornadoes are possible in parts of the Plains Monday.

The main impacts are expected from the eastern Texas panhandle to Oklahoma.

This is a previous version of our forecast for an outbreak of severe storms and flash flooding in the southern Plains on May 20, 2019. To see the latest updates, click here .