What is EF0 regarding tornadoes?

EF0 is the weakest category on the Enhanced Fujita scale which runs from EF0 to EF5. It is a system of rating tornadoes that uses damage to estimate a tornado's wind speed and then assign a rating.

An EF0 tornado has estimated winds of 65-85 mph and causes relatively minor damage.

Typical EF0 damage includes removal of small amounts of roofing material, some shedding of aluminum or vinyl siding, down gutters and awnings, and broken tree limbs with some weak rooted trees uprooted.