ADOPTION OF BEAUFORT'S WEATHER NOTATION
Weather
Notation
Code |
British Navy
1833 | British Meteor. Office
1925 | British Meteor. Office
1926 | International Convention
1935 |
| b. |
Blue sky
clear or turbid atmosphere | Blue sky
0, 1, 2, or 3 tenths cloudiness | Blue sky
clear or turbid atmosphere | Blue sky
clear or turbid
atmosphere |
| bc. | | Sky partly overcast
4, 5, or 6 tenths cloudiness | | |
| c. | Individual clouds | Cloudy
7 or 8 tenths cloudiness | Cloudy
i.e., individual clouds or clouds with clear spaces between | Cloudy
i.e., individual clouds or clouds with clear spaces between |
| d. | Drizzle | Drizzle | Drizzle | Drizzle |
| e. | | Damp air
but without
precipitation | Damp air
but without precipitation | Damp air
without falling rain.
Considerable water deposited on trees, buildings, riggings, etc. |
| f. | Fog | Fog | Fog | Fog |
| f: | Dense fog | Damp fog (wetting) visibility less than 1000 yards | Damp fog (wetting) visibility less than 1000 yards | |
| g. | Dark, gloomy weather | Gloomy | Gloomy weather | Gloomy weather |
| h. | Hail | Hail | Hail | Hail |
| l. | Lightning | Lightning | | Lightning |
| m. | Mist
limited visibility |
Mist
visibility 1100 yards or more but less than 2200 yards | Mist
visibility 1100 yards or more but less than 2200 yards | Mist
visibility 1100 yards or more but less than 2200 yards |
| o. | Overcast
Entire sky covered by thick clouds. | Overcast
9 to 10 tenths cloudiness | Overcast
Entire sky covered by one impermeable cloud mass. | Overcast |
| p. | Passing shower |
Passing shower | Passing shower | Passing shower |
| q. | Squally wind | Squally wind | Squally wind | Squally wind |
| r. | Rain, uninterrupted | Rain | Rain | Rain |
| rs. | | Snow with rain | Snow with rain | Snow with rain |
| s. | Snow | Snow | Snow | Snow |
| t. | Thunder | Thunder | Thunder | Thunder |
| u. | Unfavourable, threatening skies | Unfavourable, threatening skies | Unfavourable, threatening skies | Unfavourable, threatening skies |
| v. | Visibility | Visibility of
distant objects, independent of cloudiness | Unusual visibility | Clear sky, unusual visibility |
| w. | Wet, dew | Dew |
Dew | Dew |
| x. | Indicates exceptional
degree | Hoar frost | Hoar frost | Hoar frost |
| y. | | Dry air
(relative humidity less than 60%) | Dry air
(relative humidity less than 60%) |
Dry air
(relative humidity less than 60%) |
| Note: In the system of notation of the British Meteorological Office for 1925-1926, when fog, electrical phenomena, wind, or precipitation are of high intensity, they are indicated by the respective capital letter; long duration of these phenomena is indicated by doubling the corresponding letter; the letter i can be used to signify interrupted, random phenomena. |
