This is the moment a tornado formed in the town of Arnett in Oklahoma, making it another US state hit by severe weather in the past few days.
Footage caught by storm chasers captured the a tornado touching ground and throwing debris across the air.
Much of the state is expected to experience a moderate risk of tornadoes with a severe thunderstorm warning in effect.
Oklahoma is one of many states that has been hit with severe weather that has left 28 people dead in neighbouring states.