風力 0 - Calm

地球への影響

Calm, smoke rises vertically

海の状態

Sea surface smooth and mirror-like

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

風力 1 - Light Air

地球への影響

Smoke drift indicates wind direction, still wind vanes

海の状態

Scaly ripples, no foam crests

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

風力 2 - Light Breeze

地球への影響

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

海の状態

Small wavelets, crests glassy, no breaking

速度
  • 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

風力 3 - Gentle Breeze

地球への影響

Leaves and small twigs constantly moving, light flags extended

海の状態

Large wavelets, crests begin to break, scattered whitecaps

速度
  • 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

風力 4 - Moderate Breeze

地球への影響

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

海の状態

Small waves. becoming longer, numerous whitecaps

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

風力 5 - Fresh Breeze

地球への影響

Small trees in leaf begin to sway

海の状態

Moderate waves taking longer form, many whitecaps, some spray

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

風力 6 - Strong Breeze

地球への影響

Larger tree branches moving, whistling in wires

海の状態

Larger waves , whitecaps common, more spray

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

風力 7 - Near Gale

地球への影響

Whole trees moving, resistance felt walking against wind

海の状態

Sea heaps up, waves , white foam streaks off breakers

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

風力 8 - Gale

地球への影響

Whole trees in motion, resistance felt walking against wind

海の状態

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

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

風力 9 - Strong Gale

地球への影響

Slight structural damage occurs, slate blows off roofs

海の状態

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

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

風力 10 - Storm

地球への影響

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

海の状態

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

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

風力 11 - Violent Storm

地球への影響

Widespread devastation

海の状態

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

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

風力 12 - Hurricane

地球への影響

Considerable destruction

海の状態

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

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