Technical data - Wind speed
3 - 17
830 / 07.2012
Original operating instructions
3.7 Wind speed
Wind force
Wind
speed Effect
Beau-
fort
scale
Description m/s kph On shore
0Calm
0-0.2 1
Calm, smoke rises vertically
1 Light draught
0.3-1.5 1-5
Direction of wind is displayed by
the direction of the smoke, but
not by a weather vane
2 Light breeze
1.6-3.3 6-11
Wind is felt on the face, leaves
rustle, weather vane moves
3 Weak breeze
3.4-5.4 12-19
Leaves and small twigs in
constant motion, wind extends
a light flag
4 Moderate
breeze
5.5-7.9 20-28
Wind raises dust and loose
paper; small branches move
5 Fresh breeze
8.0-10.7 29-38
Small-leaved trees begin to
sway; crested wavelets form on
inland waters
6 Strong
breeze
10.8-13.8 39-49
Large branches move;
overhead wires whistle;
umbrellas are difficult to control
7 Moderate
gale
13.9-17.1 50-61
Whole trees sway
8 Fresh gale
17.2-20.7 62-74
Twigs break off trees; walking is
difficult
9Storm
20.8-24.4 75-88
Slight structural damage
occurs, shingles may blow off
10 Heavy storm
24.5-28.4 89-102
Trees uprooted; considerable
structural damage occurs
11 Hurricane
type storm
28.5-32.6 103-117
Extensive storm damages
(rarely in inland)
12 Hurricane
32.7-36.9 118-133
Severe devastation
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