In FDS, the wind can be modeled as a boundary condition in the cubic control volume that can be used to investigate the effects of wind on flame, smoke, HVAC, etc. For more information, you can refer to the User's Guide attached below. See chapter 10, Page 125.
Fire Dynamic Simulation software can be implemented to analyze the influence of wind on fluid-related parameters within the control volume, such as smoke and flame. As far as I know, It is not applicable to perform solid mechanics analysis. For instance, the effect of wind on the structures cannot be evaluated.
Regarding capabilities, different wind conditions can be defined by giving related coefficients, explained in the user manual. For instance, you can choose to simulate the wind blowing on the beach or in the woods. Another example is that you can consider the turbulent or steady-state flow.
Here is an example of specifying some of the coefficients applicable to the definition of a wind blowing southwesterly (DIRECTION=225) at a speed of 5 m/s (WIND SPEED=5) over a farm field (Z_0=0.03) with unstable conditions (L=-100). see tables 10.1 and 10.2 for additional values for other cases.