Síla větru 0 - Calm

Dopad na Zemi

Calm, smoke rises vertically

Stav moře

Sea surface smooth and mirror-like

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

Síla větru 1 - Light Air

Dopad na Zemi

Smoke drift indicates wind direction, still wind vanes

Stav moře

Scaly ripples, no foam crests

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

Síla větru 2 - Light Breeze

Dopad na Zemi

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

Stav moře

Small wavelets, crests glassy, no breaking

Rychlost
  • 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

Síla větru 3 - Gentle Breeze

Dopad na Zemi

Leaves and small twigs constantly moving, light flags extended

Stav moře

Large wavelets, crests begin to break, scattered whitecaps

Rychlost
  • 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

Síla větru 4 - Moderate Breeze

Dopad na Zemi

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

Stav moře

Small waves. becoming longer, numerous whitecaps

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

Síla větru 5 - Fresh Breeze

Dopad na Zemi

Small trees in leaf begin to sway

Stav moře

Moderate waves taking longer form, many whitecaps, some spray

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

Síla větru 6 - Strong Breeze

Dopad na Zemi

Larger tree branches moving, whistling in wires

Stav moře

Larger waves , whitecaps common, more spray

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

Síla větru 7 - Near Gale

Dopad na Zemi

Whole trees moving, resistance felt walking against wind

Stav moře

Sea heaps up, waves , white foam streaks off breakers

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

Síla větru 8 - Gale

Dopad na Zemi

Whole trees in motion, resistance felt walking against wind

Stav moře

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

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

Síla větru 9 - Strong Gale

Dopad na Zemi

Slight structural damage occurs, slate blows off roofs

Stav moře

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

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

Síla větru 10 - Storm

Dopad na Zemi

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

Stav moře

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

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

Síla větru 11 - Violent Storm

Dopad na Zemi

Widespread devastation

Stav moře

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

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

Síla větru 12 - Hurricane

Dopad na Zemi

Considerable destruction

Stav moře

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

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