F3 tornado in Knox and Anderson County, Tennessee

Tornado February 21, 1993 · Knox and Anderson County, Tennessee

Rating

6.0 mi

Path length

150 yd

Path width

$5.0M

Damage as recorded

What F3 means. This tornado was rated on Fujita’s original scale, used until 2007. F3 meant severe damage: whole stories of well-built houses destroyed, large buildings badly damaged, trains overturned; the scale paired it with winds of 158–206 mph, figures later judged too high, especially toward the top of the scale, and revised downward in the Enhanced Fujita scale. Ratings then, as now, came from the damage.

What the National Weather Service wrote

The tornado that went through Anderson County continued into Knox County affecting the towns of Powell and Northbrook. Eleven homes were destroyed and another 75 homes were damaged. Numerous trees were knocked down as well.

Source: NOAA Storm Events Database, event 10349726. Narratives are written by the National Weather Service forecast office that issued the report.

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