I’m getting some odd results using the windrose with an epw from Stockholm, Arlanda. Sorting the dataset and looking at speeds and directions the data about the strongest winds looks like this:
In the windrose (ill post below to workaround the one image per post policy) the strongest winds are plotted from the west, and not north (10 degrees) as the dataset dictates. How are degrees interpreted by the windrose component? I assumed north would be 0, east 90, south 180 and west 270…?
If west is set to 0 degrees, this particular case would be correct - does windrose for some reason assume 0 degrees to be west?