When did the enhanced Fujita scale replace the regular Fujita scale when measuring a tornadoes strength?
On February 1, 2007, the (regular) Fujita scale was decommissioned in favor of the more accurate Enhanced Fujita Scale, which replaces it. The EF Scale improved on the F-scale on many counts—it accounts for different degrees of damage that occur with different types of structures, both man-made and natural. It also provides much better estimates for wind speeds, and sets no upper limit on the wind speeds for the strongest level, EF5.
