Hi, Thank you very much for the answer. If you manage to find any reference for the calculation of all-sector U50, that would be great. As for the third question, the wind type refers to types of winds we have in Croatia, for example Bora wind (strongest winds are almost always Bora) blows usually in 0° to 45° and depending on the location the range of direction may vary a bit. The other most frequent wind (Jugo) is in 140°- 190° range (cca) and so on. So the question was in the sense if it is "more correct" to divide data bins by wind types rather then strict sectors, because as I understand, the Gumbel method refers to "extreme events" and types of extreme wind events. Anyway, I've tested the Climate Analyst in a sense that I've changed the number of sectors, but I've got pretty much the same all-sector result. Thank you, Siniša