
How do tornados form?
This tornado is one of the worst to hit the area for a long time.
It was more than a mile wide and caused loads of damage as it swept over Oklahoma.
Martin caught up with BBC weatherman Simon King to find out how tornados form.
This tornado is one of the worst to hit the area for a long time.
It was more than a mile wide and caused loads of damage as it swept over Oklahoma.
Martin caught up with BBC weatherman Simon King to find out how tornados form.