http://ontario.hazards.ca/maps/windroses/Windrose-doc-figure.png
A windrose is used to show the direction and velocity of winds in a specific location for a period of time. The windrose gives the exact direction for which the wind actually blew, as well as the specific percentage of times when the wind was blowing out of a certain direction for an area. The windrose which is shown was created for Ontario, Canada. As you can see in the windrose, the wind most frequently blew out of the Northwest and the Southeast in Ontario. The windrose explains the velocity and how often the wind actually blows at a certain strength, as well as how often the winds come from one direction or another. When dealing with a windrose, the direction and wind velocity are the main trend of interest.
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