0 |
- < 1 km/h
- 0 - 0,2 m/s
- 0 kt
- Calm
-
On the Water
Flat.
-
On LandSmoke rises vertically
|
1 |
- 1 - 5 km/h
- 0,3 - 1,5 m/s
- 1 - 3 kt
- Light air
-
On the Water
Small, scaly ripples without crests
-
On LandWind indicated by drift of smoke
|
2 |
- 6 - 11 km/h
- 1,6 - 3,3 m/s
- 4 - 6 kt
- Light breeze
-
On the Water
Small wavelets, even shorter but more pronounced. The crests look glassy and do not break.
-
On LandWind vane begin to move
|
3 |
- 12 - 19 km/h
- 3,4 - 5,4 m/s
- 7 - 10 kt
- Gentle breeze
-
On the Water
Large wavelets, crests begin to break, scattered small whitecaps.
-
On LandLeaves and small twigs moving, light flags extended
|
4 |
- 20 - 28 km/h
- 5,5 - 7,9 m/s
- 11 - 16 kt
- Moderate breeze
-
On the Water
Waves still small, but become longer, numerous whitecaps
-
On LandDust, leaves and loose paper lifted, twigs and thinner branches move
|
5 |
- 29 - 38 km/h
- 8,0 - 10,7 m/s
- 17 - 21 kt
- Fresh breeze
-
On the Water
Moderate waves with pronounced long shape. Many whitecaps, sporadic spray.
-
On LandSmall trees in leaf begin to sway
|
6 |
- 39 - 49 km/h
- 10,8 - 13,8 m/s
- 22 - 27 kt
- Strong breeze
-
On the Water
Large waves begin to form; crests break and leave behind larger white foam surfaces; some spray.
-
On LandLarger branches moving
|
7 |
- 50 - 61 km/h
- 13,9 - 17,1 m/s
- 28 - 33 kt
- High wind
-
On the Water
Sea heaps up and foam begins to streak.
-
On LandWhole trees in motion.
|
8 |
- 62 - 74 km/h
- 17,2 - 20,7 m/s
- 34 - 40 kt
- Fresh Gale
-
On the Water
Moderately high waves, edges of crests begin to break into spindrift, foam blown in streaks
-
On LandTwigs breaking off trees, generally impedes progress
|
9 |
- 75 - 88 km/h
- 20,8 - 24,4 m/s
- 41 - 47 kt
- Strong Gale
-
On the Water
High waves with dense foam, wave crests start to roll over, spray may reduce visibility
-
On LandLarger branches break off trees, and some small trees blow over, minor damage to houses.
|
10 |
- 89 - 102 km/h
- 24,5 - 28,4 m/s
- 48 - 55 kt
- Whole Storm
-
On the Water
Very high wave with overhanging crests, large patches of foam give the sea a white appearance, heavy rolling, lowered visibility.
-
On LandUprooted trees, considerable structural damage.
|
11 |
- 103 - 117 km/h
- 28,5 - 32,6 m/s
- 56 - 63 kt
- Violent Storm
-
On the Water
Exceptionally high waves, very large patches of foam cover sea, visibility severely reduced.
-
On LandWidespread vegetation damage
|
12 |
- > 117 km/h
- > 32,7 m/s
- > 64 kt
- Hurricane-force
-
On the Water
Huge waves. Sea is completely white with foam and spray. Air is filled with driving spray, greatly reducing visibility.
-
On LandSevere damage
|