Question about wind vector


I am trying to simulate airflow from the southeast direction and a little bit confusing about the wind vector setting. As shown in the figure, the default value is (0,1,0) and just wondering isn’t the default value had been set that the wind will come from the NORTH direction? So that if I am going to simulate the wind come from the southeast direction, I will need to set the wind vector as (1,-1,0)?