Windkracht 0 - Calm

Impact op de aarde

Calm, smoke rises vertically

Toestand van de zee

Sea surface smooth and mirror-like

Snelheid
  • 0-1 km/h
  • 0-0,54 noeuds (knot)
  • 0 - 0,621 mph
hauteur
  • 0 m
  • 0 ft
 Signe

Windkracht 1 - Light Air

Impact op de aarde

Smoke drift indicates wind direction, still wind vanes

Toestand van de zee

Scaly ripples, no foam crests

Snelheid
  • 1-5 km/h
  • 0,54-2,7 noeuds (knot)
  • 0,621 - 3,11 mph
hauteur
  • 0 - 0,1 m
  • 0-1 ft
 Signe

Windkracht 2 - Light Breeze

Impact op de aarde

Wind felt on face, leaves rustle, vanes begin to move

Toestand van de zee

Small wavelets, crests glassy, no breaking

Snelheid
  • 5-11 km/h
  • 2,7-5,9 noeuds (knot)
  • 3,11-6,84 mph
hauteur
  • 0,1 - 0,5 m
  • 1-2 ft
 Signe

Windkracht 3 - Gentle Breeze

Impact op de aarde

Leaves and small twigs constantly moving, light flags extended

Toestand van de zee

Large wavelets, crests begin to break, scattered whitecaps

Snelheid
  • 11-19 km/h
  • 5.9-10,2 noeuds (knot)
  • 6,84-11,81 mph
hauteur
  • 0,5 - 1,25 m
  • 2-3,5 ft
 Signe

Windkracht 4 - Moderate Breeze

Impact op de aarde

Dust, leaves, and loose paper lifted, small tree branches move

Toestand van de zee

Small waves. becoming longer, numerous whitecaps

Snelheid
  • 19-28 km/h
  • 10,2-15 noeuds (knot)
  • 11,81-17,4 mph
hauteur
  • 1-2 m
  • 3,5-6 ft
 Signe

Windkracht 5 - Fresh Breeze

Impact op de aarde

Small trees in leaf begin to sway

Toestand van de zee

Moderate waves taking longer form, many whitecaps, some spray

Snelheid
  • 28-38 km/h
  • 15-20,5 noeuds (knot)
  • 17,4-23,61 mph
hauteur
  • 2-3 m
  • 6-9 ft
 Signe

Windkracht 6 - Strong Breeze

Impact op de aarde

Larger tree branches moving, whistling in wires

Toestand van de zee

Larger waves , whitecaps common, more spray

Snelheid
  • 38-50 km/h
  • 20,5-27 noeuds (knot)
  • 23,61-31,07 mph
hauteur
  • 3-4 m
  • 9-13 ft
 Signe

Windkracht 7 - Near Gale

Impact op de aarde

Whole trees moving, resistance felt walking against wind

Toestand van de zee

Sea heaps up, waves , white foam streaks off breakers

Snelheid
  • 50-61 km/h
  • 27-33 noeuds (knot)
  • 31,07-37,9 mph
hauteur
  • 4-5,5 m
  • 13-19 ft
 Signe

Windkracht 8 - Gale

Impact op de aarde

Whole trees in motion, resistance felt walking against wind

Toestand van de zee

Moderately high waves of greater length, edges of crests begin to break into spindrift, foam blown in streaks

Snelheid
  • 62-74 km/h
  • 33-40 noeuds (knot)
  • 37,9-45,98 mph
hauteur
  • 5,5-7,5 m
  • 18-25 ft
 Signe

Windkracht 9 - Strong Gale

Impact op de aarde

Slight structural damage occurs, slate blows off roofs

Toestand van de zee

High waves, sea begins to roll, dense streaks of foam, spray may reduce visibility

Snelheid
  • 75-88 km/h
  • 40-47,5 noeuds (knot)
  • 45,98-54,68 mph
hauteur
  • 7-10 m
  • 23-32 ft
 Signe

Windkracht 10 - Storm

Impact op de aarde

Seldom experienced on land, trees broken or uprooted,considerable structural damage

Toestand van de zee

Very high waves with overhanging crests, sea white with densely blown foam, heavy rolling, lowered visibility

Snelheid
  • 89-102 km/h
  • 47,5-55 noeuds (knot)
  • 54,68-63,38 mph
hauteur
  • 9-12,5 m
  • 29-41 ft
 Signe

Windkracht 11 - Violent Storm

Impact op de aarde

Widespread devastation

Toestand van de zee

Exceptionally high waves, foam patches cover sea, visibility more reduced

Snelheid
  • 103-117 km/h
  • 55-63 noeuds (knot)
  • 63,38-72,2 mph
hauteur
  • 11,5-16 m
  • 37-52 ft
 Signe

Windkracht 12 - Hurricane

Impact op de aarde

Considerable destruction

Toestand van de zee

Air filled with foam, sea completely white with driving spray, visibility greatly reduced

Snelheid
  • >118 km/h
  • >63 noeuds (knot)
  • >72,2 mph
hauteur
  • >14 m
  • >46 ft
 Signe