风力 0 - Calm

对地球的影响

Calm, smoke rises vertically

海州

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

风力 1 - Light Air

对地球的影响

Smoke drift indicates wind direction, still wind vanes

海州

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

风力 2 - Light Breeze

对地球的影响

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

海州

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

风力 3 - Gentle Breeze

对地球的影响

Leaves and small twigs constantly moving, light flags extended

海州

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

风力 4 - Moderate Breeze

对地球的影响

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

海州

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

风力 5 - Fresh Breeze

对地球的影响

Small trees in leaf begin to sway

海州

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

风力 6 - Strong Breeze

对地球的影响

Larger tree branches moving, whistling in wires

海州

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

风力 7 - Near Gale

对地球的影响

Whole trees moving, resistance felt walking against wind

海州

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

风力 8 - Gale

对地球的影响

Whole trees in motion, resistance felt walking against wind

海州

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

风力 9 - Strong Gale

对地球的影响

Slight structural damage occurs, slate blows off roofs

海州

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

风力 10 - Storm

对地球的影响

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

海州

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

风力 11 - Violent Storm

对地球的影响

Widespread devastation

海州

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

风力 12 - Hurricane

对地球的影响

Considerable destruction

海州

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