Weather Conditions

 

Contents

Beaufont Scale

Links to the Met. Office

Beaufort Scale

Force
Miles
per
hour
Km
per
hour
Knots per
hour
Probable
wave height
feet
Probable
wave height
m
Description
Effects
on
land
Effects
on
sea
0
0-1
0-1
0-1
-
-
Calm
Still, calm air, smoke will rise vertically.
Water is mirror-like.
1
1-3
1-5
1-3
1/4
0.1
Light Air
Rising smoke drifts, wind vane is inactive.
Small ripples appear on water surface.
2
4-7
6-11
4-6
1/2
0.2
Light Breeze
Leaves rustle, can feel wind on your face, wind vanes begin to move.
Small wavelets develop, crests are glassy.
3
8-12
12-19
7-10
2
0.6
Gentle Breeze
Leaves and small twigs move, light weight flags extend.
Large wavelets, crests start to break, some white horses.
4
13-18
20-28
11-16
3 1/2
1.0
Moderate Breeze
Small branches move, raises dust, leaves and paper.
Small waves develop, becoming longer, frequent white horses.
5
19-24
29-38
17-21
6
2.0
Fresh Breeze
Small trees sway.
White crested wavelets form, some spray.
6
25-31
39-49
22-27
9 1/2
3.0
Strong Breeze
Large tree branches move,  telephone wires begin to "whistle", umbrellas used with difficulty.
Larger waves form, white horses prevalent, spray.
7
32-38
50-61
28-33
13 1/2
4.0
Moderate or Near Gale
Large trees sway, becoming difficult to walk.
Larger waves develop, white foam from breaking waves begins to be blown.
8
39-46
62-74
34-40
18
6.0
Gale or Fresh Gale
Twigs and small branches are broken from trees, walking is difficult.
Moderately large waves with blown foam.
9
47-54
75-88
41-47
23
7.0
Strong Gale
Slight damage occurs to buildings, shingles are blown off of roofs.
High waves, rolling seas, dense foam, Blowing spray reduces visibility.
10
55-63
89-102
48-55
29
9.0
Whole Gale or Storm
Trees are broken or uprooted, building damage is considerable.
Large waves, overhanging crests, sea becomes white with foam, heavy rolling, reduced visibility.
11
64-72
103-117
56-63
37
11.5
Violent Storm
Extensive widespread damage.
Large waves, white foam, visibility further reduced.
12
73+
118+
64+
-
14.0
Hurricane
Extreme destruction, devastation.
Large waves, air filled with foam, sea white with foam and driving spray, little visibility.

 

Links to the Met. Office

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UK Shipping Forecast

UK Shipping Forecast Area

UK Inshore Waters Forecast

UK Inshore Waters Forecast Locations

UK Gale Warning

Note

Imminent, means expected in the next 6 hours

Soon, means expected in the next 6 to 12 hours

Later, means expected in the next 12 to 24 hours

 

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