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Introduction to the definition of weather by its physical parameters and stability class.
The method followed is that defined in the article:
Defrance, Jérôme & Salomons, Erik & Stuijt, Ingrid & Heimann, Dietrich & Plovsing, Birger & Watts, G.R & Jonasson, Hans & Zhang, Xuetao & Premat, Eric & Schmich-Yamane, Isabelle & Aballéa, François-Edern & Baulac, Marine & Roo, Foort. (2007). Outdoor Sound Propagation Reference Model Developed in the European Harmonoise Project. Acta Acustica united with Acustica. 93. 213-227.
To access it, you must select a propagation mode following the Harmonoise method (octave or third-octave) and specify that you wish to define the parameters yourself, as shown here:

Please Note:
Calculus can be longer than the one done iwith NMPB met