A windrose is a graphical technique used to view how wind speed and direction are distributed at a certain location. The longer spokes show winds with a greater frequency while shorter spokes represent winds with a smaller frequency. The length of the spoke correlates to the amount of time the wind blew from that direction during the time ellapsed. The colors depict the wind speed. This windrose represents 30 years of combined hourly data for April winds in Fresno, California. This shows that 50% of the winds in April come from the northwest. It also shows which speeds occur more often by comparing the position of the colored segment to the rings on the windrose.
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