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Friday 03 September 2010 |
Wind charts show the wind speed and direction for a given altitude. Be careful to check the altitude your wind chart applies to - for surfing & windsurfing, you want surface-level winds.
To get around surface friction problems, surface-level wind speeds are normally given for 10 metres above ground level.
Wind speed and direction. Wind speed may be in knots (20kts is 23mph or 37kmph), miles per hour or kilometres per hour.
On met charts, wind speed is often represented by feathers on a wind arrow, where one big feather = 10kts and one small one = 5kts. Wind direction is represented by the direction the arrow is pointing towards.
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