The Enhanced Fujita scale rates the intensity of tornadoes in some countries, including the United States and Canada, based on the severity of the damage they cause. The Enhanced Fujita scale replaced the decommissioned Fujita scale that was introduced in 1971 by Ted Fujita.

What does the EF-scale measure?

The Enhanced Fujita Scale or EF Scale, which became operational on February 1, 2007, is used to assign a tornado a 'rating' based on estimated wind speeds and related damage.

How bad is a EF1 tornado?

EF1 tornadoes have wind speeds of 86 to 110 miles per hour. Damage includes broken glass in doors and windows, uplift of roof deck and significant loss of roof covering (>20%), collapse of chimneys and garage doors, mobile homes pushed off foundations or overturned, and moving automobiles pushed off roads.