![wind rose diagram interpretation wind rose diagram interpretation](https://windroseexcel.com/wp-content/uploads/2016/04/wre-excel-example-1.jpg)
It is often the case that the wind patterns measured at the airport are very different than the wind patterns of nearby sites.
#Wind rose diagram interpretation software
While weather data from software tools can provide a basic understanding of wind patterns, the best way to get accurate data is to perform real measurements at the site itself.Ĭlimate data, including wind patterns, mostly comes from airports. Of the winds from the WNW direction, wind speeds are most often in the 19 mph and 25 mph range.
![wind rose diagram interpretation wind rose diagram interpretation](https://www.researchgate.net/publication/339078310/figure/download/fig2/AS:855629442854914@1581009364346/Surface-wind-rose-plots-during-the-summer-a-b-and-winter-c-d-at-C1-and-S1-The.png)
In this sample, Speed Distribution wind rose (an annual wind rose from Boston, Massachusetts), winds from the WNW direction is most common (more than 10% of annual hours). The radial length of each spoke around the circle is the percentage of time that the wind blows from that direction. Each spoke is divided by color into wind speed ranges. This chart shows the frequency and speed of wind blowing from each direction.Īs you move outward on the radial scale, the frequency associated with wind coming from that direction increases. Wind can vary a lot by site and the provided weather data may not be accurate for you) (But make sure this data is valid for your site.
![wind rose diagram interpretation wind rose diagram interpretation](https://www.geological-digressions.com/wp-content/uploads/2019/02/paleo-measure-rose.jpg)
In Insight you can produce tri-monthly Wind Rose charts to observe how wind patterns change throughout the year. Wind roses can be a yearly average, or can be made for specific seasons some even include air temperature information. In terms of angle measurement in degrees, North corresponds to 0°/360°, East to 90°, South to 180° and West to 270°.Ĭompiling a wind rose is one of the preliminary steps taken in constructing airport runways, as aircraft can have a lower ground speed at both landing and takeoff when pointing against the wind.Wind rose diagrams help you visualize wind patterns at a site. Use them to better inform your design decisions, but be aware of unique microclimates and site considerations that wind rose diagrams will not capture.Ī "wind rose" diagram is the most common way of displaying wind data, and can be measured in a “speed distribution” or a “frequency distribution". Wind roses typically use 16 cardinal directions, such as north (N), NNE, NE, etc., although they may be subdivided into as many as 32 directions. A wind rose plot may contain additional information, in that each spoke is broken down into colour-coded bands that show wind speed ranges. Each concentric circle represents a different frequency, emanating from zero at the center to increasing frequencies at the outer circles. The length of each "spoke" around the circle is related to the frequency that the wind blows from a particular direction per unit time. Presented in a circular format, the modern wind rose shows the frequency of winds blowing from particular directions over a specified period. North was depicted with a fleur de lis, while east was shown as a Christian cross to indicate the direction of Jerusalem from Europe. No differentiation was made between cardinal directions and the winds which blew from those directions. Before the development of the compass rose, a wind rose was included on maps in order to let the reader know which directions the 8 major winds (and sometimes 8 half-winds and 16 quarter-winds) blew within the plan view.