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EF-0, winds of 65 to 85 mph (105 to 137 kph)
Tornadoes are rated by the havoc they inflict, on a scale of 1 to 5. But to fully comprehend this scale, you have to see the aftermath.
After a tornado is reported, the National Weather Service deploys storm survey teams to analyze the damage. The teams analyze the damage and calculate the wind speeds necessary for the destruction.
The lowest tornado rating, EF-0, is reserved for minor damage. Above, an EF-0 tornado peeled back parts of the roof on a chicken barn in Ringgold, Georgia.