Weather

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Weather

• Quick Quiz

2
Beaufort Force 8

• Mean wind speed (knots) 37
• Limit of wind speed (knots) 34 - 40
• Description Gale
• Sea State Very Rough - High

3
Beaufort Force 10

• Mean wind speed (knots) 52
• Limit of wind speed (knots) 48 - 55
• Description Storm
• Sea State Very High

4
Beaufort Force 12

• Mean wind speed (knots) N/A
• Limit of wind speed (knots) Greater than 64
• Description Hurricane
• Sea State Phenomenal
• Note this use of the word Hurricane does not
  have the same meaning as its use in terms of a
  tropical storm

5
Beaufort Force 1

• Mean wind speed (knots) 2
• Limit of wind speed (knots) 1 - 3
• Description Light Air
• Sea State Calm (rippled)

6
Beaufort Force 6

• Mean wind speed (knots) 24
• Limit of wind speed (knots) 22 - 27
• Description Strong Breeze
• Sea State Rough

7
Rapidly

• This term describes a weather system that is
  moving
• at 35 to 45 knots

8
Very High

• This is the term used to describe a wave height
• 9.0 to 14.0m

9
Sea Fog

• A type of advection fog formed when air that has
  been lying over a warm water surface is
  transported over a colder water surface
• This results in cooling of the lower layer of air
  below its dewpoint

10
Rapidly

• This term describes a weather system that is
  moving
• at 35 to 45 knots

11
Veering

• The changing of the wind direction clockwise

12
Very Poor

• This term describes visibility of
• less than 1000 metres

13
Backing

• The changing of the wind in the opposite
  direction to veering (anticlockwise)

14
Very High

• This is the term used to describe a wave height
• 9.0 to 14.0m

15
Smooth

• This is the term used to describe a wave height
• less than 0.5m

16
Gale Warnings

• Are issued as required throughout the day (for
  winds of Gale Force 8 or more)
• These are displayed with the Shipping forecast

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Soon

• This weather changes is
• Expected within six to 12 hours of time of issue
  

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Moderate

• This term describes visibility of
• between 2 and 5 Nm

19
Rough

• This is the term used to describe a wave height
• 2.5 to 4.0m

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Later

• This weather changes is
• Expected more than 12 hours from time of issue

21
Beaufort Force 11

• Mean wind speed (knots) 60
• Limit of wind speed (knots) 56 - 63
• Description Violent Storm
• Sea State Very High

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Strong Wind Warnings

• Are issued as required throughout the day (for
  winds of Strong Breeze force 6 or more)
• These are displayed with the Inshore waters
  forecast

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Rising (or falling) quickly

• Pressure change of 3.6 to 6.0mb in the preceding
  three hours

24
Slowly

• This term describes a weather system that is
  moving
• at less than 15 knots

25
Beaufort Force 9

• Mean wind speed (knots) 44
• Limit of wind speed (knots) 41 - 47
• Description Severe Gale
• Sea State High

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Beaufort Force 9

• Mean wind speed (knots) 44
• Limit of wind speed (knots) 41 - 47
• Description Severe Gale
• Sea State High

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Soon

• This weather changes is
• Expected within six to 12 hours of time of issue
  

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Beaufort Force 2

• Mean wind speed (knots) 5
• Limit of wind speed (knots) 4 - 6
• Description Light Breeze
• Sea State Smooth (wavelets)

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Phenomenal

• This is the term used to describe a wave height
• greater than 14.0m

30
Beaufort Force 7

• Mean wind speed (knots) 30
• Limit of wind speed (knots) 28 - 33
• Description Near Gale
• Sea State Rough-Very Rough

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Beaufort Force 2

• Mean wind speed (knots) 5
• Limit of wind speed (knots) 4 - 6
• Description Light Breeze
• Sea State Smooth (wavelets)

32
Beaufort Force 3

• Mean wind speed (knots) 9
• Limit of wind speed (knots) 7 - 10
• Description Gentle Breeze
• Sea State Slight

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Good

• This term describes visibility of
• more than 5 Nm

34
Slight

• This is the term used to describe a wave height
• 0.5 to 1.25m

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Very Poor

• This term describes visibility of
• less than 1000 metres

36
Beaufort Force 8

• Mean wind speed (knots) 37
• Limit of wind speed (knots) 34 - 40
• Description Gale
• Sea State Very Rough - High

37
Rising (or falling) very rapidly

• Pressure change of more than 6.0mb in the
  preceding three hours

38
Beaufort Force 3

• Mean wind speed (knots) 9
• Limit of wind speed (knots) 7 - 10
• Description Gentle Breeze
• Sea State Slight

39
Poor

• This term describes visibility of
• between 1000 metres and 2 Nm

40
Moderate

• This term describes visibility of
• between 2 and 5 Nm

41
Steadily

• This term describes a weather system that is
  moving
• at 15 to 25 knots

42
Gale Warnings

• Are issued as required throughout the day (for
  winds of Gale Force 8 or more)
• These are displayed with the Shipping forecast

43
Good

• This term describes visibility of
• more than 5 Nm

44
Beaufort Force 11

• Mean wind speed (knots) 60
• Limit of wind speed (knots) 56 - 63
• Description Violent Storm
• Sea State Very High

45
Beaufort Force 12

• Mean wind speed (knots) N/A
• Limit of wind speed (knots) Greater than 64
• Description Hurricane
• Sea State Phenomenal
• Note this use of the word Hurricane does not
  have the same meaning as its use in terms of a
  tropical storm

46
Rising (or falling)

• Pressure change of 1.6 to 3.5mb in the preceding
  three hours

47
Moderate

• This is the term used to describe a wave height
• 1.25 to 2.5m

48
Rising (or falling) quickly

• Pressure change of 3.6 to 6.0mb in the preceding
  three hours

49
Slowly

• This term describes a weather system that is
  moving
• at less than 15 knots

50
High

• This is the term used to describe a wave height
• 6.0 to 9.0m

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Later

• This weather changes is
• Expected more than 12 hours from time of issue

52
Very Rapidly

• This term describes a weather system that is
  moving
• at more than 45 knots

53
Steadily

• This term describes a weather system that is
  moving
• at 15 to 25 knots

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Imminent

• This weather changes is
• Expected within six hours of time of issue

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Very Rough

• This is the term used to describe a wave height
• 4.0 to 6.0m

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Veering

• The changing of the wind direction clockwise

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Rising (or falling)

• Pressure change of 1.6 to 3.5mb in the preceding
  three hours

58
Poor

• This term describes visibility of
• between 1000 metres and 2 Nm

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Imminent

• This weather changes is
• Expected within six hours of time of issue

60
Beaufort Force 1

• Mean wind speed (knots) 2
• Limit of wind speed (knots) 1 - 3
• Description Light Air
• Sea State Calm (rippled)

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Very Rapidly

• This term describes a weather system that is
  moving
• at more than 45 knots

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High

• This is the term used to describe a wave height
• 6.0 to 9.0m

63
Very Rough

• This is the term used to describe a wave height
• 4.0 to 6.0m

64
Beaufort Force 4

• Mean wind speed (knots) 13
• Limit of wind speed (knots) 11 - 16
• Description Moderate breeze
• Sea State Slight-Moderate

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Beaufort Force 6

• Mean wind speed (knots) 24
• Limit of wind speed (knots) 22 - 27
• Description Strong Breeze
• Sea State Rough

66
Strong Wind Warnings

• Are issued as required throughout the day (for
  winds of Strong Breeze force 6 or more)
• These are displayed with the Inshore waters
  forecast

67
Rather Quickly

• This term describes a weather system that is
  moving
• at 25 to 35 knots

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Beaufort Force 10

• Mean wind speed (knots) 52
• Limit of wind speed (knots) 48 - 55
• Description Storm
• Sea State Very High

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Beaufort Force 0

• Mean wind speed (knots) 0
• Limit of wind speed (knots) Less than 1
• Description Calm
• Sea State Calm (glassy)

70
Rising (or falling) slowly

• Pressure change of 0.1 to 1.5mb in the preceding
  three hours

71
Beaufort Force 7

• Mean wind speed (knots) 30
• Limit of wind speed (knots) 28 - 33
• Description Near Gale
• Sea State Rough-Very Rough

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Beaufort Force 4

• Mean wind speed (knots) 13
• Limit of wind speed (knots) 11 - 16
• Description Moderate breeze
• Sea State Slight-Moderate

73
Rather Quickly

• This term describes a weather system that is
  moving
• at 25 to 35 knots

74
Smooth

• This is the term used to describe a wave height
• less than 0.5m

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Slight

• This is the term used to describe a wave height
• 0.5 to 1.25m

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Moderate

• This is the term used to describe a wave height
• 1.25 to 2.5m

77
Beaufort Force 5

• Mean wind speed (knots) 19
• Limit of wind speed (knots) 17 - 21
• Description Fresh Breeze
• Sea State Moderate

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Beaufort Force 0

• Mean wind speed (knots) 0
• Limit of wind speed (knots) Less than 1
• Description Calm
• Sea State Calm (glassy)

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Rough

• This is the term used to describe a wave height
• 2.5 to 4.0m

80
Phenomenal

• This is the term used to describe a wave height
• greater than 14.0m

81
Sea Fog

• A type of advection fog formed when air that has
  been lying over a warm water surface is
  transported over a colder water surface
• This results in cooling of the lower layer of air
  below its dewpoint

82
Rising (or falling) slowly

• Pressure change of 0.1 to 1.5mb in the preceding
  three hours

83
Rising (or falling) very rapidly

• Pressure change of more than 6.0mb in the
  preceding three hours

84
Beaufort Force 5

• Mean wind speed (knots) 19
• Limit of wind speed (knots) 17 - 21
• Description Fresh Breeze
• Sea State Moderate

85
Backing

• The changing of the wind in the opposite
  direction to veering (anticlockwise)