Besides having a colorful, peacock-like appearance, windroses are
helpful to meteorologists because they depict wind direction frequency in a
given location in a visually interesting and effective way. According to this Maine website, data is
presented for 36 directions, in order to reduce any bias from using a
particular windrose software. In
addition, this windrose represents five years of data, which helps in
determining trends. We can see
that most of the winds in this area in Maine came from the northwest – the
winds from this direction were also some of the strongest winds (black). The least of the winds in this area
come from the southeast. It is
important to consider that windroses such as these are site-specific and really
depend on the topography (mountains versus valleys).
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