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Beaufort scale

Beaufort scale Named after the 19th-century British naval officer who devised it, the Beaufort Scale assesses wind speed according to its effects. Originally designed in 1806 as an aid for sailors, it has since been adapted for use on land and was internationally recognised in 1874.

Scale

Wind speed

Name

km/h

mph

0

0–1

0–1

Calm

1

1–5

1–3

Light air

2

6–11

4–7

Light breeze

3

12–19

8–12

Gentle breeze

4

20–28

13–18

Moderate

5

29–38

19–24

Fresh

6

39–49

25–31

Strong

7

50–61

32–38

Near gale

8

62–74

39–46

Gale

9

75–88

47–54

Strong gale

10

89–102

55–63

Storm

11

103–117

64–72

Violent storm

12–17

118+

73+

Hurricane


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Beaufort scale

Beaufort scale A scale of values, from 0 to 12, for describing wind strength, as defined by Admiral Sir Francis Beaufort (1774–1857) in 1806 (the scale was accepted by the British Admiralty in 1838 and adopted by the International Meteorological Committee in 1874). Each wind force is recognized by its common effects on objects in the landscape (dust, flags, trees, etc.) and on people in the open, or on the state of the sea surface.

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"Beaufort scale." A Dictionary of Ecology. . Encyclopedia.com. 20 Feb. 2018 <http://www.encyclopedia.com>.

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Beaufort scale

Beaufort scale Scale of values, from 0 to 12, for describing wind strength, as defined by Admiral Beaufort in the nineteenth century. Each wind force is recognized by its common effects on objects in the landscape (dust, flags, trees, etc.) and on people in the open, or on the state of the sea surface. See also SAFFIR/SIMPSON SCALE; and FUJITA TORNADO INTENSITY SCALE.

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Beaufort Sea

Beaufort Sea (bō´fərt), part of the Arctic Ocean, N of Alaska and Canada, between Point Barrow, Alaska, and the Canadian Arctic Archipelago. The Mackenzie River flows into the sea, which is always covered with pack ice. It was first explored by the Canadian Vilhjalmur Stefansson in 1914.

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