Conversione di forza del vento

Scaly ripples, no foam crests

Small wavelets, crests glassy, no breaking

Large wavelets, crests begin to break, scattered whitecaps

Small waves. becoming longer, numerous whitecaps

Moderate waves taking longer form, many whitecaps, some spray

Larger waves , whitecaps common, more spray

Sea heaps up, waves , white foam streaks off breakers

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

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

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

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

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