Main content
The power of a tornado
Scientists demonstrate the power of a tornado's winds in a laboratory in Texas. This clip refers to the F Scale (Fujita Scale), a system used to rate tornadoes' intensity. Since 2007, a scale known as the Enhanced F Scale has been used to rate twisters in the US and some other countries.
Duration:
This clip is from
Featured in...
![]()
Earth
Find out how the Earth works.
More clips from The Hunt for the Supertwister
-
![]()
What triggers a twister?
Duration: 03:17
More clips from Horizon
-
![]()
The results are in...—2021, Horizon Special: The Vaccine
Duration: 02:02
-
![]()
Pluto’s first pictures—2020, Pluto: Back from the Dead
Duration: 02:30
