| EYE Color/pulse
|
Beaufort
Force |
Knots |
MPH |
Sea Conditions |
Slow on/off
Pulse |
Force 0 |
0-1 |
Calm
0-1.7 |
Glassy-smooth, mirror-like |
Violet with
1 Blue pulse |
Force 1 |
2-3 |
Light air
1.8-4 |
Scale-like ripples |
Indigo with
2 Blue pulses |
Force 2 |
4-6 |
Light breeze
4.1-7.4 |
Small, short wavelets with glassy crests |
Blue with
3 Green pulses |
Force 3 |
7-10 |
Gentle breeze
7.5-12.0 |
Large wavelets, crests begin to break |
Green with
4 Yellow pulses |
Force 4 |
11-16 |
Moderate breeze
12.1-18.9 |
Small waves, some whitecaps |
Yellow with
5 Orange pulses |
Force 5 |
17-21 |
Fresh breeze
19.0-24.7 |
Moderate longer waves, better formed with
Many whitecaps, much foam, some spray |
Orange with
6 Red pulses |
Force 6 |
22-27 |
Strong breeze
24.8-31.6 |
Large waves form, many whitecaps, foam everywhere, more spray |
Red with
7 White pulses |
Force 7 |
28-33 |
Moderate gale
31.7-38.5 |
Sea heaps up, streaks of foam spindrift begins |
