Bresser 7003800 Bedienungsanleitung Seite 26

4.14.3 Beaufort scale table
The Beaufort scale is an international scale of wind velocities ranging from 0 (calm) to 12
Hurricane force).
Beaufort Scale
0 Calm
1 Light air
2 Light breeze
3 Gentle breeze
Moderate
4
breeze
5 Fresh breeze
6 Strong breeze
7 High wind
8 Gale
9 Strong gale
10 Storm
11 Violent storm
12 Hurricane force
Description Wind Speed
10.8 ~ 13.8 m/s
13.9 ~ 17.1 m/s
17.2 ~ 20.7 m/s
20.8 ~ 24.4 m/s
24.5 ~ 28.4 m/s
103 ~ 117 km/h
28.5 ~ 32.6 m/s
< 1 km/h
< 1 mph
Calm. Smoke rises vertically.
< 1
knots
< 0.3 m/s
1.1 ~ 5km/h
Smoke drift indicates wind direction.
1 ~ 3 mph
Leaves and wind vanes are stationary.
1 ~ 3 knots
0.3 ~ 1.5 m/s
6 ~ 11 km/h
Wind felt on exposed skin. Leaves rustle.
4 ~ 7 mph
Wind vanes begin to move.
4 ~ 6 knots
1.6 ~ 3.3 m/s
12 ~ 19 km/h
Leaves and small twigs constantly moving,
8 ~ 12 mph
light flags extended.
7 ~ 10 knots
3.4 ~ 5.4 m/s
20 ~ 28 km/h
Dust and loose paper raised.
13 ~ 17 mph
Small branches begin to move.
11 ~ 16 knots
5.5 ~ 7.9 m/s
29 ~ 38 km/h
Branches of a moderate size move.
18 ~ 24 mph
Small trees in leaf begin to sway.
17 ~ 21 knots
8.0 ~ 10.7 m/s
39 ~ 49 km/h
Large branches in motion. Whistling heard
25 ~ 30 mph
in overhead wires. Umbrella use becomes
22 ~ 27 knots
difficult. Empty plastic bins tip over.
50 ~ 61 km/h
Whole trees in motion. Effort needed to
31 ~ 38 mph
walk against the wind.
28 ~ 33 knots
62 ~ 74 km/h
Some twigs broken from trees.
39 ~ 46 mph
Cars veer on road. Progress on foot is
34 ~ 40 knots
seriously impeded.
75 ~ 88 km/h
Some branches break off trees, and some
47 ~ 54 mph
small trees blow over. Construction /
41 ~ 47 knots
temporary signs and barricades blow over.
89 ~ 102 km/h
Trees are broken off or uprooted,
55 ~ 63 mph
structural damage likely.
48 ~ 55 knots
Widespread vegetation and structural
64 ~ 73 mph
damage likely.
56 ~ 63 knots
≥ 118 km/h
Severe widespread damage to vegetation
≥ 74 mph
and structures. Debris and unsecured
≥ 64 knots
objects are hurled about.
≥ 32.7m/s
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Land Condition