| Força del vent | Denominació | Impacte sobre la terra | Estat del mar |
Alçada de les onades en metres | Alçada de les onades als peus | Velocitat del vent en km / h | Velocitat del vent en nusos | Velocitat del vent en milles per hora |
| Força del vent | Denominació | Impacte sobre la terra | Estat del mar |
Alçada de les onades en metres | Alçada de les onades als peus | Velocitat del vent en km / h | Velocitat del vent en nusos | Velocitat del vent en milles per hora |
| 0 | Calm | Calm, smoke rises vertically | Sea surface smooth and mirror-like
 | 0 | 0 | 0-1 | 0-0,54 | 0 - 0,621 |
| 1 | Light Air | Smoke drift indicates wind direction, still wind vanes | Scaly ripples, no foam crests
 | 0 - 0,1 | 0-1 | 1-5 | 0,54-2,7 | 0,621 - 3,11 |
| 2 | Light Breeze | Wind felt on face, leaves rustle, vanes begin to move | Small wavelets, crests glassy, no breaking
 | 0,1 - 0,5 | 1-2 | 5-11 | 2,7-5,9 | 3,11-6,84 |
| 3 | Gentle Breeze | Leaves and small twigs constantly moving, light flags extended | Large wavelets, crests begin to break, scattered whitecaps
 | 0,5 - 1,25 | 2-3,5 | 11-19 | 5.9-10,2 | 6,84-11,81 |
| 4 | Moderate Breeze | Dust, leaves, and loose paper lifted, small tree branches move | Small waves. becoming longer, numerous whitecaps
 | 1-2 | 3,5-6 | 19-28 | 10,2-15 | 11,81-17,4 |
| 5 | Fresh Breeze | Small trees in leaf begin to sway | Moderate waves taking longer form, many whitecaps, some spray
 | 2-3 | 6-9 | 28-38 | 15-20,5 | 17,4-23,61 |
| 6 | Strong Breeze | Larger tree branches moving, whistling in wires | Larger waves , whitecaps common, more spray
 | 3-4 | 9-13 | 38-50 | 20,5-27 | 23,61-31,07 |
| 7 | Near Gale | Whole trees moving, resistance felt walking against wind | Sea heaps up, waves , white foam streaks off breakers
 | 4-5,5 | 13-19 | 50-61 | 27-33 | 31,07-37,9 |
| 8 | Gale | Whole trees in motion, resistance felt walking against wind | Moderately high waves of greater length, edges of crests begin to break into spindrift, foam blown in streaks
 | 5,5-7,5 | 18-25 | 62-74 | 33-40 | 37,9-45,98 |
| 9 | Strong Gale | Slight structural damage occurs, slate blows off roofs | High waves, sea begins to roll, dense streaks of foam, spray may reduce visibility
 | 7-10 | 23-32 | 75-88 | 40-47,5 | 45,98-54,68 |
| 10 | Storm | Seldom experienced on land, trees broken or uprooted,considerable structural damage | Very high waves with overhanging crests, sea white with densely blown foam, heavy rolling, lowered visibility
 | 9-12,5 | 29-41 | 89-102 | 47,5-55 | 54,68-63,38 |
| 11 | Violent Storm | Widespread devastation | Exceptionally high waves, foam patches cover sea, visibility more reduced
 | 11,5-16 | 37-52 | 103-117 | 55-63 | 63,38-72,2 |
| 12 | Hurricane | Considerable destruction | Air filled with foam, sea completely white with driving spray, visibility greatly reduced
 | >14 | >46 | >118 | >63 | >72,2 |
