Beaufort scale definition, a scale of wind forces, described by name and range of velocity, and classified as from force 0 to force 12, or, sometimes, to force 17. The Beaufort scale, officially known as the Beaufort wind force scale, is a descriptive table. The Beaufort scale is a scale for measuring wind speeds.It is based on observation rather than accurate measurement. See more. Actually, the Beaufort scale goes all the way to 17, but the last five numbers only apply to tropical typhoons. In addition to our wind speed converter, you can also convert precipitation values and distances (e.g. Beaufort Wind Scale Table Force Wind Speed Descriptive Term Effects Observed at Sea Effects Observed on Land; Km/h Knots; 0: Less than 1: Less than 1: Calm: Sea surface like a mirror, but not necessarily flat. He developed the scale in 1805 to help sailors estimate the winds via visual observations. Leaves rustle. It depicts the force of wind by a series of numbers from 0 to 12. Beaufort Wind Scale 10 Whole gale: 48-55 Knots, Sea has white appearance, waves have long overhanging crests great patches of foam. These numbers are only used in the areas around China and Taiwan. Force: Name: Wind Speed knots mph Consequence: 0: Calm: 0: 0: Smoke rises vertically: Wave height: 0 m - Sea: Like a mirror 1 The Beaufort scale as originally drawn up was calibrated to Beaufort’s assessment of the various effects of the wind on a full-rigged man-of-war. Modern scale. The Beaufort Scale or Beaufort Wind Force Scale is a system for estimating wind strengths without the use of instruments, based on the effects wind has on the physical environment.
3 8-12 11 Gentle breeze Leaves and smaller twigs in constant motion. Admiral Beaufort’s ‘Scale of wind force’ Francis Beaufort devised his scale of wind force in 1805, when serving aboard HMS Woolwich, and first mentioned it in his private log on 13 January 1806, stating that he would, “hereafter estimate the force of the wind according to the following scale”.
The behaviour of smoke, waves, trees, etc., is rated on a 13 point scale of 0 (calm) to 12 (hurricane). The Beaufort scale is excellent .. if you can see occasional whitecaps (or "whitehorses"), you know it's around 15 knots. It was devised by Irishman Francis Beaufort in 1805, an officer in the British Royal Navy. Nearly 70,000 homes were left without electricity Thursday as a cyclone lashed the French Indian Ocean island of Reunion. Description of the Beaufort Wind Scale. He wanted to create a standard scale, which would allow naval officers to relate sea conditions to a mean wind speed when taking meteorological observations. The Beaufort wind scale is divided into series of values, from zero for calm winds, up to twelve and above for hurricanes. The Beaufort Scale gives us a way of describing measured mean wind speeds (in numbers) with words. The Beaufort Scale or Beaufort Wind Force Scale is a system for estimating wind strengths without the use of instruments, based on the effects wind has on the physical environment. The Beaufort Wind Scale is named after Sir Francis Beaufort, an admiral in the British Navy. Beaufort scale synonyms, Beaufort scale pronunciation, Beaufort scale translation, English dictionary definition of Beaufort scale. The Beaufort scale is an empirical measure that relates wind speed tae observed condeetions at sea or on laund. It turned out to be a great help and was later adapted for use on land. Appearance of Wind Effects; On the Water On Land; 0: Less than 1: Calm: Sea surface smooth and mirror-like: Calm, smoke rises vertically: 1: 1-3: Light Air: Scaly ripples, no foam crests: Smoke drift indicates wind direction, still wind vanes: 2: 4-6: Light Breeze: Small wavelets, crests glassy, no breaking: Wind … It depicts the force of wind by a series of numbers from 0 to 12.
Beaufort wind force scale The Beaufort scale, which is used in Met Office marine forecasts, is an empirical measure for describing wind intensity based on observed sea conditions. The Beaufort scale, officially known as the Beaufort wind force scale, is a descriptive table.
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