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Wind Scale
Here is a wind scale (Beaufort) that shows the scale of winds and
their corisponding force number that may prove useful for safety
reasons in using our machinery.
Wind Type
Speed
(mph)
Description
Force Number
Calm
1
If smoke rises in a vertical
direction.
0
Light Air
1 to 3
The direction of smoke drifts
not by the wind or vanes.
1
Light Breeze
4 to 7
Weather vanes move and the
wind is felt on the face.
2
Gentle Breeze
8 to 12
Lightly weighted flags extend
and leaves are moving.
3
Moderate Breeze
13 to 18
Refuse and small twigs
move with dust raising by the wind.
4
Fresh Breeze
19 to 24
Small leafed trees start
to sway.
5
Strong Breeze
25 to 31
Large tree branches start
swaying.
6
Near Gale
32 to 38
It becomes difficult to
walk due to the power of the wind. Whole trees start to sway.
7
Gale
39 to 46
Twigs break off of trees
8
Strong Gale
47 to 54
Slight structural damage
may occur like slates, tiles and chimney pots blown off.
