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Beaufort scale


Description Velocitat del vent
10m above ground
Specification Probable wave height (max)
Land Sea Coast
0 Calmat < 1 kt
0-0.2 m/s
< 1 km/h
< 1 mph
  • Calmat
  • Smoke rises vertically
  • Sea like a mirror
  • Calmat
0 m
0 ft
1 Aire lleuger 1-3 kt
0.3-1.5 m/s
1-5 km/h
1-3 mph
  • Direction of wind shown by smoke drift but not by wind vanes
  • Ripples with the appearance of scales are formed, but without foam crests
  • Fishing smack just has steerage way
0.1 (0.1) m
0.25 (0.25) ft
2 Brisa lleugera 4-6 kt
1.6-3.3 m/s
6-11 km/h
4-7 mph
  • Wind felt on face
  • Leaves rustle
  • Ordinary vanes moved by wind
  • Small wavelets, still short but more pronounced
  • Crests have a glassy appearance and do not break
  • Wind fills the sails of smacks which then travel at about 1-2 kt
0.2 (0.3) m
0.5 (1) ft
3 Brisa suau 7-10 kt
3.4-5.4 m/s
12-19 km/h
8-12 mph
  • Leaves and small twigs in constant motion
  • Wind extends light flag
  • Large wavelets
  • Crests begin to break
  • Foam of glassy appearance
  • Perhaps scattered white horses
  • Smacks begin to careen and travel about 3-4 kt
0.6 (1) m
2 (3) ft
4 Brisa moderada 11-16 kt
5.5-7.9 m/s
20-28 km/h
13-18 mph
  • Raises dust and loose paper
  • Small branches are moved
  • Small waves, becoming longer
  • Fairly frequent white horses
  • Good working breeze
  • Smacks carry all canvas with good list
1 (1.5) m
3.5 (5) ft
5 Fresh breeze 17-21 kt
8.0-10.7 m/s
29-38 km/h
19-24 mph
  • Small trees in leaf begin to sway
  • Crested wavelets form on inland waters
  • Moderate waves, taking a more pronounced long form
  • Many white horses are formed (chance of some spray)
  • Smacks shorten sail
2 (2.5) m
6 (8.5) ft
6 Strong breeze 22-27 kt
10.8-13.8 m/s
39-49 km/h
25-31 mph
  • Large branches in motion
  • Whistling heard in telegraph wires
  • Umbrellas used with difficulty
  • Large waves begin to form
  • White foam crests are more extensive everywhere (probably some spray)
  • Smacks have double reef in mainsail
  • Care required when fishing
3 (4) m
9.5 (13) ft
7 Near gale 28-33 kt
13.9-17.1 m/s
50-61 km/h
32-38 mph
  • Whole trees in motion
  • Inconvenience felt when walking against wind
  • Sea heaps up and white foam from breaking waves begins to be blown in streaks along the direction of the wind
  • Smacks remain in harbor and those at sea lie to
4 (5.5) m
13.5 (19) ft
8 Gale 34-40 kt
17.2-20.7 m/s
62-74 km/h
39-46 mph
  • Breaks twigs off trees
  • Generally impedes progress
  • Moderately high waves of greater length
  • Edges of crests begin to break into the spindrift
  • Foam is blown in well-marked streaks along the direction of the wind
  • All smacks make for harbor, if near
5.5 (7.5) m
18 (25) ft
9 Strong gale 41-47 kt
20.8-24.4 m/s
75-88 km/h
47-54 mph
  • Slight structural damage occurs (chimney pots and states removed)
  • High waves
  • Dense streaks of foam along the direction of the wind
  • Crests of waves begin to topple, tumble and roll over
  • Spray may affect visibility
- 7 (10) m
23 (32) ft
10 Storm 48-55 kt
24.5-28.4 m/s
89-102 km/h
55-63 mph
  • Seldom experienced inland
  • Trees uprooted
  • Considerable structural damage occurs
  • Very high waves with long overhanging crests
  • Resulting foam, in great patches, is blown in dense white streaks along the directionof the wind
  • On the whole, the surface of the sea takes on a white appearance
  • Tumbling of the sea becomes heavy and shock-like
  • Visibility affected
- 9 (12.5) m
29 (41) ft
11 Violent storm 56-63 kt
28.5-32.6 m/s
103-117 km/h
64-72 mph
  • Very rarely experienced
  • Accompanied by widespread damage
  • Exceptionally high waves (small and medium-sized ships might be for a time lost to view behind waves)
  • Sea is completely covered with long white patches of foam lying along the direction of the wind
  • Everywhere the edges of the wave crests are blown into froth
  • Visibility affected
- 11.5 (16) m
37 (52) ft
12 Huracà > 64 kt
> 32.7 m/s
> 118 km/h
> 73 mph
-
  • Air is filled with foam and spray
  • Sea completely white with driving spray
  • Visibility very seriously affected
- 14 (-) m
45 (-) ft


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Icones


Temperatura

Humitat

Pressió

Velocitat del vent

Wind gust

Precipitació

Radiació solar

Neu

Temperatura aparent

Punt de rosada

UV

Visibilitat

Base del núvol

Evapotranspiració

Temperatura interior

Humitat interior


Sortida

Capvespre

Sortida de la lluna

Conjunt de la lluna

Time

Menu

Des de

To

Pantalla completa

Exporta com a imatge

Ajustos

Pàgina d'inici

Webcam

Taula

Gràfic

Mapa

Constant

Pujant

Caient

Avisos

Latitud

Longitud

Història

Ecplisi solar

Eclipsi llunar

GPS

Elevació

Dia

Mes

Any

Alta temperatura

Tempertura baixa

Dia

Nit

Primavera

Estiu

Tardor

Hivern