BEAUFORT WIND SPEED CHART


SPEED (mph) BEAUFORT WIND SPEED EVALUATION CHART
0 Smoke rises vertically
1 - 3 Direction of wind shown by smoke drift but not by wind vanes
4 - 7 Wind felt on face, leaves rustle, ordinary wind vane moved by wind
8 - 12 Leaves and small twigs in motion, light flags extended
13 - 18 Dust raised, loose paper raised, small branches move
19 - 24 Small leafy tress sway, crested wavelets form on lakes and ponds
25 - 31 Large branches in motion, whistling in telephone wires or link fences
32 - 38 Whole trees in motion, inconvenience felt walking against wind
39 - 46 Twigs break off trees, impedes progress walking
47 - 54 Small branches break off dead or diseased trees
55 - 63 Slight structural damage (chimneys and shingles), branches break off healthy trees with leaves
64 - 72 Large branches of trees broken off, trees with leaves uprooted, structural damage mostly to roofs
73+ Damage to structures major and widespread, many roofs and windows damaged

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