F0 (40 - 74 mph)    Light Damage

Some damage to chimneys; break branches off trees; push over shallow rooted trees or down rotten trees; damage to signs and billboards; light-weight awnings and canopies damaged.

Peel surface off roofs (large sections of shingles removed from roof corners and eaves); home chimneys collasped; mobile home pushed off foundations or overturned; moving automobiles pushed off road; windows broken by flying debris.

Sections of roof and porches damaged, especially if inadequately anchored; large sections of gabled roofs may be torn off on leeward side; car port roofs lifted; extensive damage to garage roofs, if door is on windward side; mobile homes demolished; boxcars pushed over; large trees snapped or uprooted; light-object missles generated.

Roofs and some walls torn off well-constructed houses; trains overturned; most trees in forest uprooted; heavy cars lifted off the ground and thrown a sizeable distance.

Well constructed houses leveled; structures with weak foundations blown some distance; cars thrown and large missles generated.

Strong frame houses lifted off foundations and carried considerable distance to disintegrate; automobile-sized missles fly through the air for hundreds of yards; trees debarked.