![]() The total number of events and the corresponding percentages for each direction and wind speed class are automatically updated. If available, the user may also specify the average wind speed for each direction, as shown for example in the green cells. For example, wind blowing from North (N) with a speed smaller than 1 m/s has been observed 51 times, while wind blowing from North East (NE) with speed between 1 m/s and 2 m/s has been observed 159 times. ![]() Each yellow cell contains the number of events observed over a specific time period for a specific combination of wind direction and speed. In other words the joint distribution of wind direction and speed must be calculated, as shown for example in the next figure. The first step to plot a wind rose with an electronic data sheet is to organize the wind data in a table according to their direction and speed classes. It is a very useful representation because a large quantity of data can be summarised in a single plot. Two sample files are also available.Ī wind rose is a chart which gives a view of how wind speed and wind direction are distributed at a particular location over a specific period of time. ![]() In this post we show how to produce a simple wind rose using Microsoft Excel or Open Office Calc. ![]()
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