The Fujita Scale is used to categorize the amount of damage that can be expected from tornadoes of varying strengths. Destruction increases as numbers advance from F0 through F5.

	F0 Light Chimneys are damaged, tree branches are broken, shallow-rooted trees are toppled.
	F1 Moderate Roof surfaces are peeled off, windows are broken, some tree trunks are snapped, unanchored mobile homes are overturned, attached garages may be destroyed.
	F2 Considerable Roof structures are damaged, mobile homes are destroyed, debris becomes airborne, large trees are snapped or uprooted.
	F3 Severe Roofs and some walls are torn from structures, some small buildings are destroyed, non-reinforced masonry buildings are destroyed, most trees in forest are uprooted.
	F4 Devastating Well-constructed houses are destroyed, some structures are lifted from foundations and blown some distance, cars are blown some distance, large debris becomes airborne.
	F5 Incredible Strong frame houses are lifted from foundations, reinforced concrete structures are damaged, automobile-sized missiles become airborne, trees are completely debarked.

Saffir Simpson Scale, Photos of Hurricane Damage

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Photos & Definitions
Courtesy of FEMA

F0, F1 & F2 Photos by Andrew Devanas
F3, F4 & F5 Photos by NOAA