Forta vantului 0 - Calm

Impactul pe pământ

Calm, smoke rises vertically

Marea de stat

Sea surface smooth and mirror-like

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

Forta vantului 1 - Light Air

Impactul pe pământ

Smoke drift indicates wind direction, still wind vanes

Marea de stat

Scaly ripples, no foam crests

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

Forta vantului 2 - Light Breeze

Impactul pe pământ

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

Marea de stat

Small wavelets, crests glassy, no breaking

Viteză
  • 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

Forta vantului 3 - Gentle Breeze

Impactul pe pământ

Leaves and small twigs constantly moving, light flags extended

Marea de stat

Large wavelets, crests begin to break, scattered whitecaps

Viteză
  • 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

Forta vantului 4 - Moderate Breeze

Impactul pe pământ

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

Marea de stat

Small waves. becoming longer, numerous whitecaps

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

Forta vantului 5 - Fresh Breeze

Impactul pe pământ

Small trees in leaf begin to sway

Marea de stat

Moderate waves taking longer form, many whitecaps, some spray

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

Forta vantului 6 - Strong Breeze

Impactul pe pământ

Larger tree branches moving, whistling in wires

Marea de stat

Larger waves , whitecaps common, more spray

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

Forta vantului 7 - Near Gale

Impactul pe pământ

Whole trees moving, resistance felt walking against wind

Marea de stat

Sea heaps up, waves , white foam streaks off breakers

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

Forta vantului 8 - Gale

Impactul pe pământ

Whole trees in motion, resistance felt walking against wind

Marea de stat

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

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

Forta vantului 9 - Strong Gale

Impactul pe pământ

Slight structural damage occurs, slate blows off roofs

Marea de stat

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

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

Forta vantului 10 - Storm

Impactul pe pământ

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

Marea de stat

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

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

Forta vantului 11 - Violent Storm

Impactul pe pământ

Widespread devastation

Marea de stat

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

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

Forta vantului 12 - Hurricane

Impactul pe pământ

Considerable destruction

Marea de stat

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

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