C1 Minimal Damage is done primarily to shrubbery and trees, unanchored mobile homes are damaged, some signs are damaged, no real damage is done to structures.
	C2 Moderate Some trees are toppled, some roof coverings are damaged, major damage is done to mobile homes.
	C3 Extensive Large trees are toppled, some structural damage is done to roofs, mobile homes are destroyed, structural damage is done to small homes and utility buildings.
	C4 Extreme Extensive damage is done to roofs, windows, and doors; roof systems on small buildings completely fail; some curtain walls fail.
	C5 Catastrophic Roof damage is considerable and widespread, window and door damage is severe, there are extensive glass failures, some complete buildings fail.

Fujita Scale, Photos of Tornado Damage

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Photos & Definitions
Courtesy of FEMA

C1, C2, C3 & C4 Photos by FEMA
C5 Photos by NOAA