Beaufort Wind Scale

0

< 1

Calm

Smoke rises vertically.

1

1-3

Light Air

Direction of wind shown by smoke drift but not by wind vanes.

2

4-7

4-6

Light Breeze

Wind felt on face;
Leaves rustle; Wind vanes moved by wind

3

8-12

7-10

Gentle Breeze

Leaves and small twigs in constant motion; Wind extends light flag.

4

13-18

11-16

Moderate

Raises dust, loose paper; Small branches moved.

5

19-24

17-21

Fresh

Small trees begin to sway; Crested wavelets form on inland waters.

6

25-31

22-27

Strong

Large branches in motion; Whistling heard in telephone wires; Umbrellas
used with difficulty.

7

32-38

28-33

Near Gale

Whole trees in motion; Inconvenience felt walking against the wind.

8

39-46

34-40

Gale

Twigs break off trees; Wind generally impedes progress; Mobile homes
may shake.

9

47-54

41-47

Strong Gale

Slight structural damage occurs; Mobile homes, sheds, roofs, lanais,
and RV's suffer minor damage.

10

55-63

48-55

Storm

Small trees uprooted; Moderate damage occurs to mobile homes and RV's;
Brick and wood frame houses receive minor structural and roof damage;
Some signs blown down.

11

64-73

56-63

Violent Storm

Moderate sized trees uprooted; Large branches snapped off trees;
Chimneys and road signs toppled; Significant mobile home damage;
Power lines downed.

12

74-95

64-83

Hurricane Category 1

Mobile homes overturned; Large trees and branches downed; Moderate
roof damage to wood and brick homes; Minor pier damage.