BEAUFORT WIND SCALE
| No. | Velocity Knots | Description |
| 0 | 0 | Calm. |
| 1 | 1 – 3 | Light Air. |
| 2 | 4 – 6 | Light Breeze. |
| 3 | 7 – 10 | Gentle Breeze. |
| 4 | 11 – 15 | Moderate Breeze. |
| 5 | 16 – 20 | Fresh Breeze. |
| 6 | 21 – 26 | Strong Breeze. |
| 7 | 27 – 33 | Moderate Gale. |
| 8 | 34 – 40 | Fresh Gale. |
| 9 | 41 – 47 | Strong Gale. |
| 10 | 48 – 55 | Whole Gale. |
| 11 | 56 – 65 | Storm |
| 12 | Above 65 | Hurricane |
SEA DISTURBANCE SCALE
| No. | Description | Height of Wave, Crest to Trough |
| 0 | Calm | 0 |
| 1 | Very Smooth | Less than 1 ft. |
| 2 | Smooth | 1 – 2 ft. |
| 3 | Slight | 2 – 3 ft. |
| 4 | Moderate | 3 – 5 ft. |
| 5 | Rather Rough | 5 – 8 ft. |
| 6 | Rough | 8 – 12 ft. |
| 7 | High | 12 – 20 ft. |
| 8 | Very High | 20 – 40 ft. |
| 9 | Precipitous | 40 ft. and over |
VISIBILITY SCALE
| No. | Description | Distance of Vision |
| 0 | Dense Fog | Objects not visible at 50yd. |
| 1 | Thick Fog | Objects not visible at 300yd. |
| 2 | Fog | Objects not visible at 600yd. |
| 3 | Moderate Fog | Objects not visible at 1/2 ml. |
| 4 | Mist or Thin Fog | Objects not visible at 1 ml. |
| 5 | Poor Visibility | Objects not visible at 2 ml. |
| 6 | Moderate Visibility | Objects not visible at 5 ml. |
| 7 | Good Visibility | Objects not visible at 10 ml. |
| 8 | Very Good Visibility | Objects not visible at 30 ml. |
| 9 | Exceptional Visibility | Objects visible at more than 30 miles. |
BEAUFORT NOTATION TO INDICATE THE STATE OF THE WEATHER
| Weather | Beaufort Letter |
|---|---|
| Blue sky (0 – 2/3 clouded) | b |
| Sky partly clouded (3 – 5/8 clouded) | bc |
| Cloudy (6 – 8/8 clouded) | c |
| Drizzle | d |
| Wet air (without precipitation) | e |
| Fog | f |
| Gale | g |
| Hail | h |
| Precipitation in sight of ship or station | jp |
| Line squall | kq |
| Storm of drifting snow | ks |
| Sandstorm or duststorm | kz |
| Lighting | l |
| Mist | m |
| Overcast sky. (The whole sky covered with unbroken cloud) | o |
| Squally weather | q |
| Rain | r |
| Sleet (i.e. rain and snow together) | rs |
| Snow | s |
| Thunder | t |
| Thunderstorm with rain or snow | tir or tis |
| Ugly threatening sky | u |
| Unusual visibility | v |
| Dew | w |
| Hoar frost | x |
| Dry air | y |
| Dust haze | z |