The Enhanced Fujita scale (also known as the EF-Scale) is a scale to measure and categorize the intensity of a tornado. It was created to replace the Fujita scale introduced in 1971, and it began officially being used in the United States on February 1, 2007, followed by Canada on April 1, 2013. The scale has the same basic design as the original Fujita scale - six categories from zero to five, representing increasing degrees of damage. Unlike the Fujita scale which goes from F0 - F12, The Enhanced Fujita scale only goes from EF0 - EF5 (although unofficially there is also an EF6).
This table only lists the five official scales. Unofficially there is an EF6, and some also adopt an EF7 - EF12 scale. EF8+ ratings are physically impossible although it is estimated an EF6 tornado will strike within the next 10 years or so.
|Scale||Estimated wind speed||Potential damage|
|EF0||65-85||104–136||An EF0 tornado will produce little to no damage. EF0 tornadoes typically peel surface off of some roofs, damage to gutters/siding, break branches off trees, some shallow-rooted trees pushed over. If a tornado is confirmed to do no damage, it is always rated EF0. Typically EF0 tornadoes have a few injuries and no deaths, although there have been a few reported deaths in an EF0 tornado.|
|EF1||86–110||138–177||An EF1 is stronger than an EF0, and can produce some moderate damage. Some roofs will be ruined or severely stripped, mobile homes will be overturned or badly damaged, windows smashed, and some doors will be ripped off.|
|EF2||113–157||181–253||An EF2 will produce some significant damage. Roofs torn off of well-constructed homes, foundations of frame homes shifted, mobile homes destroyed, large trees snapped and uprooted, and some cars will be flipped or lifted off the ground.|
|EF3||136–165||218–265||An EF3 tornado will produce severe damage. Entire stores of well-constructed homes destroyed, severe damage to large buildings (such as shopping malls), trains overturned, trees destroyed/debarked, heavy cars will be lifted off the ground and thrown, and structures with weak foundations will be badly damaged.|
|EF4||166-200||267–321||An EF4 tornado is extremely dangerous and will produce some extreme damage. Well-constructed homes will be completely leveled (destroyed), cars and other large objects will be thrown like paper airplanes.|
|EF5||>200||>321||An EF5 tornado is the most deadly tornado level that has been reached so far. Total destruction of buildings, strong framed, well built homes leveled off foundations and swept away, steel-reinforced concrete structures will be critically damaged, tall buildings collapse or have severe structural deformations, and cars, trucks, and train cars will be thrown away, sometimes as far as 1 mile (1.6 kilometers).|