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Beaufort Scale

Kilometres per Hour

Miles per Hour  

Beaufort

0

0

0

2 - 6

1 - 3

1

7 - 12

3 - 8

2

13 - 20

8 - 13

3

21 - 30

13-19

4

31 - 40

19 - 25

5

41 - 50

25 - 31

6

51 - 61

32 - 38

7

62 - 74

39 - 46

8

75 - 89

47 - 55

9

90 - 103

56 - 64

10

104 - 119

65-74

11

120 +

75 +

12

The Beaufort scale was named after Rear Admiral Sir Francis Beaufort born in County Meath, Ireland 24th May 1774. In addition to creating the wind force scale bearing his name, he carried out hydrographic surveys which are used to this day.

 

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